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250 results on '"Blackburn, Lindy"'

201. Resolved magnetic-field structure and variability near the event horizon of Sagittarius A*

Author: Johnson, Michael D., primary, Fish, Vincent L., additional, Doeleman, Sheperd S., additional, Marrone, Daniel P., additional, Plambeck, Richard L., additional, Wardle, John F. C., additional, Akiyama, Kazunori, additional, Asada, Keiichi, additional, Beaudoin, Christopher, additional, Blackburn, Lindy, additional, Blundell, Ray, additional, Bower, Geoffrey C., additional, Brinkerink, Christiaan, additional, Broderick, Avery E., additional, Cappallo, Roger, additional, Chael, Andrew A., additional, Crew, Geoffrey B., additional, Dexter, Jason, additional, Dexter, Matt, additional, Freund, Robert, additional, Friberg, Per, additional, Gold, Roman, additional, Gurwell, Mark A., additional, Ho, Paul T. P., additional, Honma, Mareki, additional, Inoue, Makoto, additional, Kosowsky, Michael, additional, Krichbaum, Thomas P., additional, Lamb, James, additional, Loeb, Abraham, additional, Lu, Ru-Sen, additional, MacMahon, David, additional, McKinney, Jonathan C., additional, Moran, James M., additional, Narayan, Ramesh, additional, Primiani, Rurik A., additional, Psaltis, Dimitrios, additional, Rogers, Alan E. E., additional, Rosenfeld, Katherine, additional, SooHoo, Jason, additional, Tilanus, Remo P. J., additional, Titus, Michael, additional, Vertatschitsch, Laura, additional, Weintroub, Jonathan, additional, Wright, Melvyn, additional, Young, Ken H., additional, Zensus, J. Anton, additional, and Ziurys, Lucy M., additional
Published: 2015
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202. High-energy electromagnetic offline follow-up of LIGO-Virgo gravitational-wave binary coalescence candidate events

Author: Blackburn, Lindy, Briggs, Michael S., Camp, Jordan, Christensen, Nelson, Connaughton, Valerie, Jenke, Peter, Remillard, Ronald A., Veitch, John, Blackburn, Lindy, Briggs, Michael S., Camp, Jordan, Christensen, Nelson, Connaughton, Valerie, Jenke, Peter, Remillard, Ronald A., and Veitch, John
Abstract: We present two different search methods for electromagnetic counterparts to gravitational-wave (GW) events from ground-based detectors using archival NASA high-energy data from the Fermi-GBM and RXTE-ASM instruments. To demonstrate the methods, we use a limited number of representative GW background noise events produced by a search for binary neutron star coalescence over the last two months of the LIGO-Virgo S6/VSR3 joint science run. Time and sky location provided by the GW data trigger a targeted search in the high-energy photon data. We use two custom pipelines: one to search for prompt gamma-ray counterparts in GBM, and the other to search for a variety of X-ray afterglow model signals in ASM. We measure the efficiency of the joint pipelines to weak gamma-ray burst counterparts, and a family of model X-ray afterglows. By requiring a detectable signal in either electromagnetic instrument coincident with a GW event, we are able to reject a large majority of GW candidates. This reduces the signal-to-noise of the loudest surviving GW background event by around 15-20%., Comment: Accepted for publication in ApJS
Published: 2014
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203. Multimessenger search for sources of gravitational waves and high-energy neutrinos: Initial results for LIGO-Virgo and IceCube

Author: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Aggarwal, Nancy, Barsotti, Lisa, Biscans, Sebastien, Bodiya, Timothy Paul, Buikema, Aaron, Donovan, Frederick J., Essick, Reed Clasey, Evans, Matthew J., Fritschel, Peter K., Gras, Slawek, Isogai, Tomoki, Katsavounidis, Erotokritos, Lee, P. J., Libson, Adam, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Miller, John, Mittleman, Richard K., Oelker, Eric Glenn, Sankar, S., Shoemaker, David H., Vaulin, Ruslan, Vitale, Salvatore, Weiss, Rainer, Wipf, C. C., Yam, William, Zhang, Fan, Zucker, Michael E., Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., Altmann, D., Anderson, T., Arguelles, C., Arlen, T. C., Auffenberg, J., Bai, X., Barwick, S. W., Baum, V., Beatty, J. J., Becker Tjus, J., Becker, K.-H., BenZvi, S., Berghaus, P., Berley, D., Bernardini, E., Bernhard, A., Besson, D. Z., Binder, G., Bindig, D., Bissok, M., Blaufuss, E., Blumenthal, J., Boersma, D. J., Bohm, C., Bos, F., Bose, D., Böser, S., Botner, O., Brayeur, L., Bretz, H.-P., Brown, A. M., Casey, J., Casier, M., Chirkin, D., Christov, A., Christy, B., Clark, K., Classen, L., Clevermann, F., Coenders, S., Cowen, D. F., Cruz Silva, A. H., Danninger, M., Daughhetee, J., Davis, J. C., Day, M., de Andre, J. P. A. M., De Clercq, C., De Ridder, S., Desiati, P., de Vries, K. D., de With, M., DeYoung, T., Díaz-Vélez, J. C., Dunkman, M., Eagan, R., Eberhardt, B., Eichmann, B., Eisch, J., Euler, S., Evenson, P. A., Fadiran, O., Fazely, A. R., Fedynitch, A., Feintzeig, J., Felde, J., Feusels, T., Filimonov, K., Finley, C., Fischer-Wasels, T., Flis, S., Franckowiak, A., Frantzen, K., Fuchs, T., Gaisser, T. K., Gallagher, J. S., Gerhardt, L., Gier, D., Gladstone, L., Glüsenkamp, T., Goldschmidt, A., Golup, G., Gonzalez, J. G., Goodman, J. A., Góra, D., Grandmont, D. T., Grant, D., Gretskov, P., Groh, J. C., Groß, A., Ha, C., Haack, C., Haj Ismail, A., Hallen, P., Hallgren, A., Halzen, F., Hanson, K., Hebecker, D., Heereman, D., Heinen, D., Helbing, K., Hellauer, R., Hellwig, D., Hickford, S., Hill, G. C., Hoffman, K. D., Hoffmann, R., Homeier, A., Hoshina, K., Huang, F., Huelsnitz, W., Hulth, P. O., Hultqvist, K., Hussain, S., Ishihara, A., Jacobi, E., Jacobsen, J., Jagielski, K., Japaridze, G. S., Jero, K., Jlelati, O., Jurkovic, M., Kaminsky, B., Kappes, A., Karg, T., Karle, A., Kauer, M., Kelley, J. L., Kheirandish, A., Kiryluk, J., Kläs, J., Klein, S. R., Köhne, J.-H., Kohnen, G., Kolanoski, H., Koob, A., Köpke, L., Kopper, C., Kopper, S., Koskinen, D. J., Kowalski, M., Kriesten, A., Krings, K., Kroll, G., Kroll, M., Kunnen, J., Kurahashi, N., Kuwabara, T., Labare, M., Larsen, D. T., Larson, M. J., Lesiak-Bzdak, M., Leuermann, M., Leute, J., Lünemann, J., Macías, O., Madsen, J., Maggi, G., Maruyama, R., Mase, K., Matis, H. S., McNally, F., Meagher, K., Medici, M., Meli, A., Meures, T., Miarecki, S., Middell, E., Middlemas, E., Milke, N., Mohrmann, L., Montaruli, T., Morse, R., Nahnhauer, R., Naumann, U., Niederhausen, H., Nowicki, S. C., Nygren, D. R., Obertacke, A., Odrowski, S., Olivas, A., Omairat, A., O’Murchadha, A., Palczewski, T., Paul, L., Penek, Ö., Pepper, J. A., Pérez de los Heros, C., Pfendner, C., Pieloth, D., Pinat, E., Posselt, J., Price, P. B., Przybylski, G. T., Pütz, J., Quinnan, M., Rädel, L., Rameez, M., Rawlins, K., Redl, P., Rees, I., Reimann, R., Resconi, E., Rhode, W., Richman, M., Riedel, B., Robertson, S., Rodrigues, J. P., Rongen, M., Rott, C., Ruhe, T., Ruzybayev, B., Ryckbosch, D., Saba, S. M., Sander, H.-G., Sandroos, J., Santander, M., Sarkar, S., Schatto, K., Scheriau, F., Schmidt, T., Schmitz, M., Schoenen, S., Schöneberg, S., Schönwald, A., Schukraft, A., Schulte, L., Schulz, O., Seckel, D., Sestayo, Y., Seunarine, S., Shanidze, R., Sheremata, C., Smith, M. W. E., Soldin, D., Spiczak, G. M., Spiering, C., Stamatikos, M., Stanev, T., Stanisha, N. A., Stasik, A., Stezelberger, T., Stokstad, R. G., Stößl, A., Strahler, E. A., Ström, R., Strotjohann, N. L., Sullivan, G. W., Taavola, H., Taboada, I., Tamburro, A., Tepe, A., Ter-Antonyan, S., Terliuk, A., Tešić, G., Tilav, S., Toale, P. A., Tobin, M. N., Tosi, D., Tselengidou, M., Unger, E., Usner, M., Vallecorsa, S., van Eijndhoven, N., Vandenbroucke, J., van Santen, J., Vehring, M., Voge, M., Vraeghe, M., Walck, C., Wallraff, M., Weaver, Ch., Wellons, M., Wendt, C., Westerhoff, S., Whelan, B. J., Whitehorn, N., Wichary, C., Wiebe, K., Wiebusch, C. H., Williams, D. R., Wissing, H., Wolf, M., Wood, T. R., Woschnagg, K., Xu, D. L., Xu, X. W., Yanez, J. P., Yodh, G., Yoshida, S., Zarzhitsky, P., Ziemann, J., Zierke, S., Zoll, M., Aasi, J., Abbott, B. P., Abbott, R., Abbott, T., Abernathy, M. R., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, Rana X., Affeldt, C., Agathos, M., Aguiar, O. D., Ajith, P., Alemic, A., Allen, B., Allocca, A., Amariutei, D., Andersen, M., Anderson, R. A., Anderson, S. B., Anderson, W. G., Arai, K., Araya, M. C., Arceneaux, C., Areeda, J. S., Ast, S., Aston, S. M., Astone, P., Aufmuth, P., Augustus, H., Aulbert, C., Aylott, B. E., Babak, S., Baker, P. T., Ballardin, G., Ballmer, Stefan W., Barayoga, J. C., Barbet, M., Barish, B. C., Barker, D., Barone, F., Barr, B., Barsuglia, M., Barton, M. A., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bauchrowitz, J., Bauer, Th. S., Baune, C., Bavigadda, V., Behnke, B., Bejger, M., Beker, M. G., Belczynski, C., Bell, A. S., Bell, C., Bergmann, G., Bersanetti, D., Bertolini, A., Betzwieser, J., Bilenko, I. A., Billingsley, G., Birch, J., Bitossi, M., Biwer, C., Bizouard, M. A., Black, E., Blackburn, J. K., Blackburn, Lindy L., Blair, D., Bloemen, S., Bock, O., Boer, M., Bogaert, G., Bogan, C., Bojtos, P., Bond, C., Bondu, F., Bonelli, L., Bonnand, R., Bork, R., Born, M., Boschi, V., Bose, Sukanta, Bosi, L., Bradaschia, C., Brady, Patrick R., Braginsky, V. B., Branchesi, M., Brau, J. E., Briant, T., Bridges, D. O., Brillet, A., Brinkmann, M., Brisson, V., Brooks, A. F., Brown, D. A., Brown, D. D., Brückner, F., Buchman, S., Bulik, T., Bulten, H. J., Buonanno, Alessandra, Burman, R., Buskulic, D., Buy, C., Cadonati, Laura, Cagnoli, G., Calderon Bustillo, J., Calloni, E., Camp, J. B., Campsie, P., Cannon, K. C., Canuel, B., Cao, J., Capano, C. D., Carbognani, F., Carbone, L., Caride, S., Castaldi, G., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Celerier, C., Cella, G., Cepeda, C., Cesarini, E., Chakraborty, R., Chalermsongsak, T., Chamberlin, S. J., Chao, S., Charlton, P., Chassande-Mottin, E., Chen, X., Chen, Y., Chincarini, A., Chiummo, A., Cho, H. S., Cho, M., Chow, J. H., Christensen, N., Chu, Q., Chua, S. S. Y., Chung, S., Ciani, G., Clara, F., Clark, D. E., Clark, J. A., Clayton, J. H., Cleva, F., Coccia, E., Cohadon, P.-F., Colla, A., Collette, C., Colombini, M., Cominsky, L., Constancio, M., Conte, A., Cook, D., Corbitt, Thomas R., Cornish, N., Corsi, A., Costa, C. A., Coughlin, M. W., Coulon, J.-P., Countryman, S., Couvares, P., Coward, D. M., Cowart, M. J., Coyne, D. C., Coyne, R., Craig, K., Creighton, J. D. E., Croce, R. P., Crowder, S. G., Cumming, A., Cunningham, L., Cuoco, E., Cutler, C., Dahl, K., Dal Canton, T., Damjanic, M., Danilishin, S. L., D’Antonio, S., Danzmann, K., Dattilo, V., Daveloza, H., Davier, M., Davies, G. S., Daw, E. J., Day, R., Dayanga, T., DeBra, D., Debreczeni, G., Degallaix, J., Deléglise, S., Del Pozzo, W., Denker, T., Dent, T., Dereli, H., Dergachev, V., De Rosa, R., DeRosa, R. T., DeSalvo, R., Dhurandhar, S., Díaz, M., Dickson, J., Di Fiore, L., Di Lieto, A., Di Palma, I., Di Virgilio, A., Dolique, V., Dominguez, E., Dooley, K. L., Doravari, S., Douglas, R., Downes, T. P., Drago, M., Drever, R. W. P., Driggers, J. C., Du, Z., Ducrot, M., Dwyer, S., Eberle, T., Edo, T., Edwards, M., Effler, A., Eggenstein, H.-B., Ehrens, P., Eichholz, J., Eikenberry, S. S., Endrőczi, G., Etzel, T., Evans, T., Factourovich, M., Fafone, V., Fairhurst, S., Fan, X., Fang, Q., Farinon, S., Farr, B., Farr, Will M., Favata, M., Fazi, D., Fehrmann, H., Fejer, M. M., Feldbaum, D., Feroz, F., Ferrante, I., Ferreira, E. C., Ferrini, F., Fidecaro, F., Finn, L. S., Fiori, I., Fisher, R. P., Flaminio, R., Fournier, J.-D., Franco, S., Frasca, S., Frasconi, F., Frede, M., Frei, Z., Freise, A., Frey, R., Fricke, T. T., Frolov, V. V., Fulda, P., Fyffe, M., Gair, Jonathan R., Gammaitoni, L., Gaonkar, S., Garufi, F., Gehrels, N., Gemme, G., Gendre, B., Genin, E., Gennai, A., Ghosh, S., Giaime, J. A., Giardina, K. D., Giazotto, A., Gleason, J., Goetz, E., Goetz, R., Gondan, L., González, G., Gordon, N., Gorodetsky, M. L., Gossan, S., Goßler, S., Gouaty, R., Gräf, C., Graff, P. B., Granata, M., Grant, A., Gray, C., Greenhalgh, R. J. S., Gretarsson, A. M., Groot, P., Grote, H., Grover, K., Grunewald, S., Guidi, G. M., Guido, C. J., Gushwa, K., Gustafson, E. K., Gustafson, R., Ha, J., Hall, E. D., Hamilton, W., Hammer, D., Hammond, G., Hanke, M., Hanks, J., Hanna, C., Hannam, M. D., Hanson, J., Harms, J., Harry, Gregory, Harry, I. W., Harstad, E. D., Hart, M., Hartman, M. T., Haster, C.-J., Haughian, K., Heidmann, A., Heintze, M., Heitmann, H., Hello, P., Hemming, G., Hendry, M., Heng, I. S., Heptonstall, A. W., Heurs, M., Hewitson, M., Hild, S., Hoak, D., Hodge, K. A., Hofman, D., Holt, K., Hopkins, P., Horrom, T., Hoske, D., Hosken, D. J., Hough, J., Howell, E. J., Hu, Y., Huerta, E., Hughey, B., Husa, S., Huttner, S. H., Huynh, M., Huynh-Dinh, T., Idrisy, A., Ingram, D. R., Inta, R., Islas, G., Ivanov, A., Iyer, B. R., Izumi, K., Jacobson, M., Jang, H., Jaranowski, P., Ji, Y., Jiménez-Forteza, F., Johnson, W. W., Jones, D. I., Jones, R., Jonker, R. J. G., Ju, L., K, Haris, Kalmus, P., Kalogera, V., Kandhasamy, S., Kang, G., Kanner, J. B., Karlen, J., Kasprzack, M., Katzman, W., Kaufer, H., Kaufer, S., Kaur, T., Kawabe, K., Kawazoe, F., Kéfélian, F., Keiser, G. M., Keitel, D., Kelley, D. B., Kells, W., Keppel, D. G., Khalaidovski, A., Khalili, F. Y., Khazanov, E. A., Kim, C., Kim, K., Kim, N. G., Kim, N., Kim, S., Kim, Y.-M., King, E. J., King, P. J., Kinzel, D. L., Kissel, J. S., Klimenko, Sergey, Kline, J. L., Koehlenbeck, S., Kokeyama, K., Kondrashov, V., Koranda, S., Korth, W. Z., Kowalska, I., Kozak, D. B., Kringel, V., Królak, A., Kuehn, G., Kumar, A., Kumar, D. Nanda, Kumar, P., Kumar, R., Kuo, L., Kutynia, A., Lam, P. K., Landry, M., Lantz, B., Larson, S., Lasky, P. D., Lazzarini, A., Lazzaro, C., Leaci, P., Leavey, S., Lebigot, E. O., Lee, C. H., Lee, H. K., Lee, H. M., Lee, J., Leonardi, M., Leong, J. R., Le Roux, A., Leroy, N., Letendre, N., Levin, Y., Levine, B., Lewis, J., Li, T. G. F., Libbrecht, K., Lin, A. C., Littenberg, T. B., Lockerbie, N. A., Lockett, V., Lodhia, D., Loew, K., Logue, J., Lombardi, A. L., Lopez, E., Lorenzini, M., Loriette, V., Lormand, M., Losurdo, G., Lough, J., Lubinski, M. J., Lück, H., Lundgren, A. P., Ma, Y., Macdonald, E. P., MacDonald, T., Machenschalk, B., Macleod, D. M., Magaña-Sandoval, F., Magee, R., Mageswaran, M., Maglione, C., Mailand, K., Majorana, E., Maksimovic, I., Malvezzi, V., Man, N., Manca, G. M., Mandel, I., Mandic, V., Mangano, V., Mangini, N. M., Mansell, G., Mantovani, M., Marchesoni, F., Marion, F., Márka, S., Márka, Z., Markosyan, A., Maros, E., Marque, J., Martelli, F., Martin, I. W., Martin, R. M., Martinelli, L., Martynov, D., Marx, J. N., Masserot, A., Massinger, T. J., Matone, L., May, G., Mazumder, N., Mazzolo, G., McCarthy, R., McClelland, D. E., McGuire, S. C., McIntyre, G., McIver, J., McLin, K., Meacher, D., Meadors, G. D., Mehmet, M., Meidam, J., Meinders, M., Melatos, A., Mendell, G., Mercer, R. A., Meshkov, S., Messenger, C., Meyer, M. S., Meyers, P. M., Mezzani, F., Miao, H., Michel, C., Mikhailov, E. E., Milano, L., Miller, J., Minenkov, Y., Mingarelli, C. M. F., Mishra, C., Mitra, S., Mitrofanov, V. P., Mitselmakher, G., Moe, B., Moggi, A., Mohan, M., Mohapatra, S. R. P., Moraru, D., Moreno, G., Morgado, N., Morriss, S. R., Mossavi, K., Mours, B., Mow-Lowry, C. M., Mueller, C. L., Mueller, G., Mukherjee, S., Mullavey, A., Munch, J., Murphy, D., Murray, P. G., Mytidis, A., Nagy, M. F., Nardecchia, I., Naticchioni, L., Nayak, R. K., Necula, V., Nelemans, G., Neri, I., Neri, M., Newton, G., Nguyen, T., Nielsen, A. B., Nissanke, S., Nitz, A. H., Nocera, F., Nolting, D., Normandin, M. E. N., Nuttall, L. K., Ochsner, E., O’Dell, J., Oh, J. J., Oh, S. H., Ohme, F., Omar, S., Oppermann, P., Oram, R., O’Reilly, B., Ortega, W., O’Shaughnessy, R., Osthelder, C., Ottaway, D. J., Ottens, R. S., Overmier, H., Owen, B. J., Padilla, C., Pai, A., Palashov, O., Palomba, C., Pan, H., Pan, Y., Pankow, C., Paoletti, F., Papa, M. A., Paris, H., Pasqualetti, A., Passaquieti, R., Passuello, D., Pedraza, M., Pele, A., Penn, S., Perreca, A., Phelps, M., Pichot, M., Pickenpack, M., Piergiovanni, F., Pierro, V., Pinard, L., Pinto, I. M., Pitkin, M., Poeld, J., Poggiani, R., Poteomkin, A., Powell, J., Prasad, J., Predoi, V., Premachandra, S., Prestegard, T., Price, L. R., Prijatelj, M., Privitera, S., Prodi, G. A., Prokhorov, L., Puncken, O., Punturo, M., Puppo, P., Pürrer, M., Qin, J., Quetschke, V., Quintero, E., Quitzow-James, R., Raab, F. J., Rabeling, D. S., Rácz, I., Radkins, H., Raffai, P., Raja, S., Rajalakshmi, G., Rakhmanov, M., Ramet, C., Ramirez, K., Rapagnani, P., Raymond, V., Razzano, M., Re, V., Recchia, S., Reed, C. M., Regimbau, T., Reid, S., Reitze, D. H., Reula, O., Rhoades, E., Ricci, F., Riesen, R., Riles, K., Robertson, N. A., Robinet, F., Rocchi, A., Roddy, S. B., Rolland, L., Rollins, J. G., Romano, R., Romanov, G., Romie, J. H., Rosińska, D., Rowan, S., Rüdiger, A., Ruggi, P., Ryan, K., Salemi, F., Sammut, L., Sandberg, V., Sanders, J. R., Sannibale, V., Santiago-Prieto, I., Saracco, E., Sassolas, B., Sathyaprakash, B. S., Saulson, P. R., Savage, R., Scheuer, J., Schilling, R., Schilman, M., Schmidt, P., Schnabel, R., Schofield, R. M. S., Schreiber, E., Schuette, D., Schutz, B. F., Scott, J., Scott, S. M., Sellers, D., Sengupta, A. S., Sentenac, D., Sequino, V., Sergeev, A., Shaddock, D. A., Shah, S., Shahriar, M. S., Shaltev, M., Shao, Z., Shapiro, B., Shawhan, P., Sidery, T. L., Siellez, K., Siemens, X., Sigg, D., Simakov, D., Singer, A., Singer, L., Singh, R., Sintes, A. M., Slagmolen, B. J. J., Slutsky, J., Smith, J. R., Smith, M. R., Smith, R. J. E., Smith-Lefebvre, N. D., Son, E. J., Sorazu, B., Souradeep, T., Staley, A., Stebbins, J., Steinke, M., Steinlechner, J., Steinlechner, S., Stephens, B. C., Steplewski, S., Stevenson, S., Stone, R., Stops, D., Strain, K. A., Straniero, N., Strigin, S., Sturani, R., Stuver, A. L., Summerscales, T. Z., Susmithan, S., Sutton, P. J., Swinkels, B., Tacca, M., Talukder, D., Tanner, D. B., Tao, J., Tarabrin, S. P., Taylor, R., Tellez, G., Thirugnanasambandam, M. P., Thomas, M., Thomas, P., Thorne, K. A., Thorne, K. S., Thrane, E., Tiwari, V., Tokmakov, K. V., Tomlinson, C., Tonelli, M., Torres, C. V., Torrie, C. I., Travasso, F., Traylor, G., Tse, M., Tshilumba, D., Tuennermann, H., Ugolini, D., Unnikrishnan, C. S., Urban, A. L., Usman, S. A., Vahlbruch, H., Vajente, G., Valdes, G., Vallisneri, M., van Beuzekom, M., van den Brand, J. F. J., Van Den Broeck, C., van der Sluys, M. V., van Heijningen, J., van Veggel, A. A., Vass, S., Vasúth, M., Vecchio, A., Vedovato, G., Veitch, J., Veitch, P. J., Venkateswara, K., Verkindt, D., Vetrano, F., Viceré, A., Vincent-Finley, R., Vinet, J.-Y., Vo, T., Vocca, H., Vorvick, C., Vousden, W. D., Vyachanin, S. P., Wade, A. R., Wade, L., Wade, M., Walker, M., Wallace, L., Walsh, S., Wang, M., Wang, X., Ward, R. L., Was, M., Weaver, B., Wei, L.-W., Weinert, M., Weinstein, A. J., Welborn, T., Wen, L., Wessels, P., West, M., Westphal, T., Wette, K., Whelan, J. T., White, D. J., Whiting, B. F., Wiesner, K., Wilkinson, C., Williams, K., Williams, L., Williams, R., Williams, T. D., Williamson, A. R., Willis, J. L., Willke, B., Wimmer, M., Winkler, W., Wiseman, A. 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A., Straniero, N., Strigin, S., Sturani, R., Stuver, A. L., Summerscales, T. Z., Susmithan, S., Sutton, P. J., Swinkels, B., Tacca, M., Talukder, D., Tanner, D. B., Tao, J., Tarabrin, S. P., Taylor, R., Tellez, G., Thirugnanasambandam, M. P., Thomas, M., Thomas, P., Thorne, K. A., Thorne, K. S., Thrane, E., Tiwari, V., Tokmakov, K. V., Tomlinson, C., Tonelli, M., Torres, C. V., Torrie, C. I., Travasso, F., Traylor, G., Tse, M., Tshilumba, D., Tuennermann, H., Ugolini, D., Unnikrishnan, C. S., Urban, A. L., Usman, S. A., Vahlbruch, H., Vajente, G., Valdes, G., Vallisneri, M., van Beuzekom, M., van den Brand, J. F. J., Van Den Broeck, C., van der Sluys, M. V., van Heijningen, J., van Veggel, A. A., Vass, S., Vasúth, M., Vecchio, A., Vedovato, G., Veitch, J., Veitch, P. J., Venkateswara, K., Verkindt, D., Vetrano, F., Viceré, A., Vincent-Finley, R., Vinet, J.-Y., Vo, T., Vocca, H., Vorvick, C., Vousden, W. D., Vyachanin, S. P., Wade, A. 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Abstract: We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint operation between 2007–2010. These include parts of the 2005–2007 run and the 2009–2010 run for LIGO-Virgo, and IceCube’s observation periods with 22, 59 and 79 strings. We find no significant coincident events, and use the search results to derive upper limits on the rate of joint sources for a range of source emission parameters. For the optimistic assumption of gravitational-wave emission energy of 10[superscript −2] M[subscript ]c[superscript 2] at ~150 Hz with ~60 ms duration, and high-energy neutrino emission of 10[superscript 51] erg comparable to the isotropic gamma-ray energy of gamma-ray bursts, we limit the source rate below 1.6 × 10[superscript -2] Mpc[superscript −3] yr[superscript −1]. We also examine how combining information from gravitational waves and neutrinos will aid discovery in the advanced gravitational-wave detector era., National Science Foundation (U.S.). Division of Polar Programs, National Science Foundation (U.S.). Physics Division, University of Wisconsin. Alumni Research Foundation, Grid Laboratory of Wisconsin, Open Science Grid, United States. Dept. of Energy, National Energy Research Scientific Computing Center (U.S.), Louisiana Optical Network Initiative
Published: 2014

204. Improved Upper Limits on the Stochastic Gravitational-Wave Background from 2009–2010 LIGO and Virgo Data

Author: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Aggarwal, Nancy, Barsotti, Lisa, Biscans, Sebastien, Bodiya, Timothy Paul, Donovan, Frederick J., Essick, Reed Clasey, Evans, Matthew J., Fritschel, Peter K., Gras, Slawek, Isogai, Tomoki, Katsavounidis, Erotokritos, Kwee, P., Lee, J., Libson, Adam, Lynch, Ryan Christopher, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Miller, John, Mittleman, Richard K., Oelker, Eric Glenn, Shoemaker, David H., Tse, Maggie, Vaulin, Ruslan, Vitale, Salvatore, Weiss, Rainer, Wipf, C. C., Zhang, Fan, Zucker, Michael E., Aasi, J., Abbott, B. P., Abbott, R., Abbott, T., Abernathy, M. R., Accadia, T., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, Rana X., Affeldt, C., Agathos, M., Aguiar, O. D., Ain, A., Ajith, P., Alemic, A., Allen, B., Allocca, A., Amariutei, D., Andersen, M., Anderson, R., Anderson, S. B., Anderson, W. G., Arai, K., Araya, M. C., Arceneaux, C., Areeda, J. S., Aston, S. M., Astone, P., Aufmuth, P., Aulbert, C., Austin, L., Aylott, B. E., Babak, S., Baker, P. T., Ballardin, G., Ballmer, Stefan W., Barayoga, J. C., Barbet, M., Barish, B. C., Barker, D., Barone, F., Barr, B., Barsuglia, M., Barton, M. A., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bauchrowitz, J., Bauer, Th. S., Behnke, B., Bejger, M., Beker, M. G., Belczynski, C., Bell, A. S., Bell, C., Bergmann, G., Bersanetti, D., Bertolini, A., Betzwieser, J., Beyersdorf, P. T., Bilenko, I. A., Billingsley, G., Birch, J., Bitossi, M., Bizouard, M. A., Black, E., Blackburn, J. K., Blackburn, Lindy L., Blair, D., Bloemen, S., Blom, M., Bock, O., Boer, M., Bogaert, G., Bogan, C., Bond, C., Bondu, F., Bonelli, L., Bonnand, R., Bork, R., Born, M., Boschi, V., Bose, Sukanta, Bosi, L., Bradaschia, C., Brady, Patrick R., Braginsky, V. B., Branchesi, M., Brau, J. E., Briant, T., Bridges, D. O., Brillet, A., Brinkmann, M., Brisson, V., Brooks, A. F., Brown, D. A., Brown, D. D., Brückner, F., Buchman, S., Bulik, T., Bulten, H. J., Buonanno, Alessandra, Burman, R., Buskulic, D., Buy, C., Cadonati, Laura, Cagnoli, G., Bustillo, J. Calderón, Calloni, E., Camp, J. B., Campsie, P., Cannon, K. C., Canuel, B., Cao, J., Capano, C. D., Carbognani, F., Carbone, L., Caride, S., Castiglia, A., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Celerier, C., Cella, G., Cepeda, C., Cesarini, E., Chakraborty, R., Chalermsongsak, T., Chamberlin, S. J., Chao, S., Charlton, P., Chassande-Mottin, E., Chen, X., Chen, Y., Chincarini, A., Chiummo, A., Cho, H. S., Chow, J., Christensen, N., Chu, Q., Chua, S. S. Y., Chung, S., Ciani, G., Clara, F., Clark, J. A., Cleva, F., Coccia, E., Cohadon, P.-F., Colla, A., Collette, C., Colombini, M., Cominsky, L., Constancio, M., Conte, A., Cook, D., Corbitt, Thomas R., Cordier, M., Cornish, N., Corpuz, A., Corsi, A., Costa, C. A., Coughlin, M. W., Coughlin, S., Coulon, J.-P., Countryman, S., Couvares, P., Coward, D. M., Cowart, M. J., Coyne, D. C., Coyne, R., Craig, K., Creighton, J. D. E., Crowder, S. G., Cumming, A., Cunningham, L., Cuoco, E., Dahl, K., Canton, T. Dal, Damjanic, M., Danilishin, S. L., D’Antonio, S., Danzmann, K., Dattilo, V., Daveloza, H., Davier, M., Davies, G. S., Daw, E. J., Day, R., Dayanga, T., Debreczeni, G., Degallaix, J., Deléglise, S., Del Pozzo, W., Denker, T., Dent, T., Dereli, H., Dergachev, V., DeRosa, R. T., DeSalvo, R., Dhurandhar, S., Díaz, M., Di Fiore, L., Di Lieto, A., Di Palma, I., Di Virgilio, A., Donath, A., Dooley, K. L., Doravari, S., Dossa, S., Douglas, R., Downes, T. P., Drago, M., Drever, R. W. P., Driggers, J. C., Du, Z., Dwyer, S., Eberle, T., Edo, T., Edwards, M., Effler, A., Eggenstein, H.-B., Ehrens, P., Eichholz, J., Eikenberry, S. S., Endrőczi, G., Etzel, T., Evans, T., Factourovich, M., Fafone, V., Fairhurst, S., Fang, Q., Farinon, S., Farr, B., Farr, Will M., Favata, M., Fehrmann, H., Fejer, M. M., Feldbaum, D., Feroz, F., Ferrante, I., Ferrini, F., Fidecaro, F., Finn, L. S., Fiori, I., Fisher, R. P., Flaminio, R., Fournier, J.-D., Franco, S., Frasca, S., Frasconi, F., Frede, M., Frei, Z., Freise, A., Frey, R., Fricke, T. T., Frolov, V. V., Fulda, P., Fyffe, M., Gair, Jonathan R., Gammaitoni, L., Gaonkar, S., Garufi, F., Gehrels, N., Gemme, G., Genin, E., Gennai, A., Ghosh, S., Giaime, J. A., Giardina, K. D., Giazotto, A., Gill, C., Gleason, J., Goetz, E., Goetz, R., Gondan, L., González, G., Gordon, N., Gorodetsky, M. L., Gossan, S., Goßler, S., Gouaty, R., Gräf, C., Graff, P. B., Granata, M., Grant, A., Gray, C., Greenhalgh, R. J. S., Gretarsson, A. M., Groot, P., Grote, H., Grover, K., Grunewald, S., Guidi, G. M., Guido, C. J., Gushwa, K., Gustafson, E. K., Gustafson, R., Hammer, D., Hammond, G., Hanke, M., Hanks, J., Hanna, C., Hanson, J., Harms, J., Harry, Gregory, Harry, I. W., Harstad, E. D., Hart, M., Hartman, M. T., Haster, C.-J., Haughian, K., Heidmann, A., Heintze, M., Heitmann, H., Hello, P., Hemming, G., Hendry, M., Heng, I. S., Heptonstall, A. W., Heurs, M., Hewitson, M., Hild, S., Hoak, D., Hodge, K. A., Holt, K., Hooper, S., Hopkins, P., Hosken, D. J., Hough, J., Howell, E. J., Hu, Y., Huerta, E., Hughey, B., Husa, S., Huttner, S. H., Huynh, M., Huynh-Dinh, T., Ingram, D. R., Inta, R., Ivanov, A., Iyer, B. R., Izumi, K., Jacobson, M., James, E., Jang, H., Jaranowski, P., Ji, Y., Jiménez-Forteza, F., Johnson, W. W., Jones, D. I., Jones, R., Jonker, R. J. G., Ju, L., K., Haris, Kalmus, P., Kalogera, V., Kandhasamy, S., Kang, G., Kanner, J. B., Karlen, J., Kasprzack, M., Katzman, W., Kaufer, H., Kawabe, K., Kawazoe, F., Kéfélian, F., Keiser, G. M., Keitel, D., Kelley, D. B., Kells, W., Khalaidovski, A., Khalili, F. Y., Khazanov, E. A., Kim, C., Kim, K., Kim, N., Kim, N. G., Kim, Y.-M., King, E. J., King, P. J., Kinzel, D. L., Kissel, J. S., Klimenko, Sergey, Kline, J. L., Koehlenbeck, S., Kokeyama, Keiko, Kondrashov, V., Koranda, S., Korth, W. Z., Kowalska, I., Kozak, D. B., Kremin, A., Kringel, V., Królak, A., Kuehn, G., Kumar, A., Kumar, P., Kumar, R., Kuo, L., Kutynia, A., Landry, M., Lantz, B., Larson, S., Lasky, P. D., Lawrie, C., Lazzarini, A., Lazzaro, C., Leaci, P., Leavey, S., Lebigot, E. O., Lee, C.-H., Lee, H. K., Lee, H. M., Leonardi, M., Leong, J. R., Le Roux, A., Leroy, N., Letendre, N., Levin, Y., Levine, B., Lewis, J., Li, T. G. F., Libbrecht, K., Lin, A. C., Littenberg, T. B., Litvine, V., Lockerbie, N. A., Lockett, V., Lodhia, D., Loew, K., Logue, J., Lombardi, A. L., Lorenzini, M., Loriette, V., Lormand, M., Losurdo, G., Lough, J., Lubinski, M. J., Lück, H., Luijten, E., Lundgren, A. P., Ma, Y., Macarthur, J., Macdonald, E. P., MacDonald, T., Machenschalk, B., Macleod, D. M., Magana-Sandoval, F., Mageswaran, M., Maglione, C., Mailand, K., Majorana, E., Maksimovic, I., Malvezzi, V., Man, N., Manca, G. M., Mandel, I., Mandic, V., Mangano, V., Mangini, N., Mantovani, M., Marchesoni, F., Marion, F., Márka, S., Márka, Z., Markosyan, A., Maros, E., Marque, J., Martelli, F., Martin, I. W., Martin, R. M., Martinelli, L., Martynov, D., Marx, J. N., Masserot, A., Massinger, T. J., Matone, L., Matzner, R. A., Mazumder, N., Mazzolo, G., McCarthy, R., McClelland, D. E., McGuire, S. C., McIntyre, G., McIver, J., McLin, K., Meacher, D., Meadors, G. D., Mehmet, M., Meidam, J., Meinders, M., Melatos, A., Mendell, G., Mercer, R. A., Meshkov, S., Messenger, C., Meyers, P., Miao, H., Michel, C., Mikhailov, E. E., Milano, L., Milde, S., Minenkov, Y., Mingarelli, C. M. F., Mishra, C., Mitra, S., Mitrofanov, V. P., Mitselmakher, G., Moe, B., Moesta, P., Mohan, M., Mohapatra, S. R. P., Moraru, D., Moreno, G., Morgado, N., Morriss, S. R., Mossavi, K., Mours, B., Mow-Lowry, C. M., Mueller, C. L., Mueller, G., Mukherjee, S., Mullavey, A., Munch, J., Murphy, D., Murray, P. G., Mytidis, A., Nagy, M. F., Kumar, D. Nanda, Nardecchia, I., Naticchioni, L., Nayak, R. K., Necula, V., Nelemans, G., Neri, I., Neri, M., Newton, G., Nguyen, T., Nitz, A., Nocera, F., Nolting, D., Normandin, M. E. N., Nuttall, L. K., Ochsner, E., O’Dell, J., Oh, J. J., Oh, S. H., Ohme, F., Oppermann, P., O’Reilly, B., O’Shaughnessy, R., Osthelder, C., Ottaway, D. J., Ottens, R. S., Overmier, H., Owen, B. J., Padilla, C., Pai, A., Palashov, O., Palomba, C., Pan, H., Pan, Y., Pankow, C., Paoletti, F., Paoletti, R., Paris, H., Pasqualetti, A., Passaquieti, R., Passuello, D., Pedraza, M., Penn, S., Perreca, A., Phelps, M., Pichot, M., Pickenpack, M., Piergiovanni, F., Pierro, V., Pinard, L., Pinto, I. M., Pitkin, M., Poeld, J., Poggiani, R., Poteomkin, A., Powell, J., Prasad, J., Premachandra, S., Prestegard, T., Price, L. R., Prijatelj, M., Privitera, S., Prodi, G. A., Prokhorov, L., Puncken, O., Punturo, M., Puppo, P., Qin, J., Quetschke, V., Quintero, E., Quiroga, G., Quitzow-James, R., Raab, F. J., Rabeling, D. S., Rácz, I., Radkins, H., Raffai, P., Raja, S., Rajalakshmi, G., Rakhmanov, M., Ramet, C., Ramirez, K., Rapagnani, P., Raymond, V., Re, V., Read, J., Reed, C. M., Regimbau, T., Reid, S., Reitze, D. H., Rhoades, E., Ricci, F., Riles, K., Robertson, N. A., Robinet, F., Rocchi, A., Rodruck, M., Rolland, L., Rollins, J. G., Romano, J. D., Romano, R., Romanov, G., Romie, J. H., Rosińska, D., Rowan, S., Rüdiger, A., Ruggi, P., Ryan, K., Salemi, F., Sammut, L., Sandberg, V., Sanders, J. R., Sannibale, V., Santiago-Prieto, I., Saracco, E., Sassolas, B., Sathyaprakash, B. S., Saulson, P. R., Savage, R., Scheuer, J., Schilling, R., Schnabel, R., Schofield, R. M. S., Schreiber, E., Schuette, D., Schutz, B. F., Scott, J., Scott, S. M., Sellers, D., Sengupta, A. S., Sentenac, D., Sequino, V., Sergeev, A., Shaddock, D., Shah, S., Shahriar, M. S., Shaltev, M., Shapiro, B., Shawhan, P., Sidery, T. L., Siellez, K., Siemens, X., Sigg, D., Simakov, D., Singer, A., Singer, L., Singh, R., Sintes, A. M., Slagmolen, B. J. J., Slutsky, J., Smith, J. R., Smith, M., Smith, R. J. E., Smith-Lefebvre, N. D., Son, E. J., Sorazu, B., Souradeep, T., Sperandio, L., Staley, A., Stebbins, J., Steinlechner, J., Steinlechner, S., Stephens, B. C., Steplewski, S., Stevenson, S., Stone, R., Stops, D., Strain, K. A., Straniero, N., Strigin, S., Sturani, R., Stuver, A. L., Summerscales, T. Z., Susmithan, S., Sutton, P. J., Swinkels, B., Tacca, M., Talukder, D., Tanner, D. B., Tarabrin, S. P., Taylor, R., ter Braack, A. P. M., Thirugnanasambandam, M. P., Thomas, M., Thomas, P., Thorne, K. A., Thorne, K. S., Thrane, E., Tiwari, V., Tokmakov, K. V., Tomlinson, C., Toncelli, A., Tonelli, M., Torre, O., Torres, C. V., Torrie, C. I., Travasso, F., Traylor, G., Ugolini, D., Unnikrishnan, C. S., Urban, A. L., Urbanek, K., Vahlbruch, H., Vajente, G., Valdes, G., Vallisneri, M., van den Brand, J. F. J., Van Den Broeck, C., van der Putten, S., van der Sluys, M. V., van Heijningen, J., van Veggel, A. A., Vass, S., Vasúth, M., Vecchio, A., Vedovato, G., Veitch, J., Veitch, P. J., Venkateswara, K., Verkindt, D., Verma, S. S., Vetrano, F., Viceré, A., Vincent-Finley, R., Vinet, J.-Y., Vo, T., Vocca, H., Vorvick, C., Vousden, W. D., Vyachanin, S. P., Wade, A., Wade, L., Wade, M., Walker, M., Wallace, L., Wang, M., Wang, X., Ward, R. L., Was, M., Weaver, B., Wei, L.-W., Weinert, M., Weinstein, A. J., Welborn, T., Wen, L., Wessels, P., West, M., Westphal, T., Wette, K., Whelan, J. T., White, D. J., Whiting, B. F., Wiesner, K., Wilkinson, C., Williams, K., Williams, L., Williams, R., Williams, T., Williamson, A. R., Willis, J. L., Willke, B., Wimmer, M., Winkler, W., Wiseman, A. G., Wittel, H., Woan, G., Worden, J., Yablon, J., Yakushin, I., Yamamoto, H., Yancey, C. C., Yang, H., Yang, Z., Yoshida, S., Yvert, M., Zadrożny, A., Zanolin, M., Zendri, J.-P., Zhang, L., Zhao, C., Zhu, X. J., Zuraw, S., Zweizig, J., Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Aggarwal, Nancy, Barsotti, Lisa, Biscans, Sebastien, Bodiya, Timothy Paul, Donovan, Frederick J., Essick, Reed Clasey, Evans, Matthew J., Fritschel, Peter K., Gras, Slawek, Isogai, Tomoki, Katsavounidis, Erotokritos, Kwee, P., Lee, J., Libson, Adam, Lynch, Ryan Christopher, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Miller, John, Mittleman, Richard K., Oelker, Eric Glenn, Shoemaker, David H., Tse, Maggie, Vaulin, Ruslan, Vitale, Salvatore, Weiss, Rainer, Wipf, C. C., Zhang, Fan, Zucker, Michael E., Aasi, J., Abbott, B. P., Abbott, R., Abbott, T., Abernathy, M. R., Accadia, T., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, Rana X., Affeldt, C., Agathos, M., Aguiar, O. D., Ain, A., Ajith, P., Alemic, A., Allen, B., Allocca, A., Amariutei, D., Andersen, M., Anderson, R., Anderson, S. B., Anderson, W. G., Arai, K., Araya, M. C., Arceneaux, C., Areeda, J. S., Aston, S. M., Astone, P., Aufmuth, P., Aulbert, C., Austin, L., Aylott, B. E., Babak, S., Baker, P. T., Ballardin, G., Ballmer, Stefan W., Barayoga, J. C., Barbet, M., Barish, B. C., Barker, D., Barone, F., Barr, B., Barsuglia, M., Barton, M. A., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bauchrowitz, J., Bauer, Th. S., Behnke, B., Bejger, M., Beker, M. G., Belczynski, C., Bell, A. S., Bell, C., Bergmann, G., Bersanetti, D., Bertolini, A., Betzwieser, J., Beyersdorf, P. T., Bilenko, I. A., Billingsley, G., Birch, J., Bitossi, M., Bizouard, M. A., Black, E., Blackburn, J. K., Blackburn, Lindy L., Blair, D., Bloemen, S., Blom, M., Bock, O., Boer, M., Bogaert, G., Bogan, C., Bond, C., Bondu, F., Bonelli, L., Bonnand, R., Bork, R., Born, M., Boschi, V., Bose, Sukanta, Bosi, L., Bradaschia, C., Brady, Patrick R., Braginsky, V. B., Branchesi, M., Brau, J. E., Briant, T., Bridges, D. O., Brillet, A., Brinkmann, M., Brisson, V., Brooks, A. F., Brown, D. A., Brown, D. D., Brückner, F., Buchman, S., Bulik, T., Bulten, H. J., Buonanno, Alessandra, Burman, R., Buskulic, D., Buy, C., Cadonati, Laura, Cagnoli, G., Bustillo, J. Calderón, Calloni, E., Camp, J. B., Campsie, P., Cannon, K. C., Canuel, B., Cao, J., Capano, C. D., Carbognani, F., Carbone, L., Caride, S., Castiglia, A., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Celerier, C., Cella, G., Cepeda, C., Cesarini, E., Chakraborty, R., Chalermsongsak, T., Chamberlin, S. J., Chao, S., Charlton, P., Chassande-Mottin, E., Chen, X., Chen, Y., Chincarini, A., Chiummo, A., Cho, H. 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L., Doravari, S., Dossa, S., Douglas, R., Downes, T. P., Drago, M., Drever, R. W. P., Driggers, J. C., Du, Z., Dwyer, S., Eberle, T., Edo, T., Edwards, M., Effler, A., Eggenstein, H.-B., Ehrens, P., Eichholz, J., Eikenberry, S. S., Endrőczi, G., Etzel, T., Evans, T., Factourovich, M., Fafone, V., Fairhurst, S., Fang, Q., Farinon, S., Farr, B., Farr, Will M., Favata, M., Fehrmann, H., Fejer, M. M., Feldbaum, D., Feroz, F., Ferrante, I., Ferrini, F., Fidecaro, F., Finn, L. S., Fiori, I., Fisher, R. P., Flaminio, R., Fournier, J.-D., Franco, S., Frasca, S., Frasconi, F., Frede, M., Frei, Z., Freise, A., Frey, R., Fricke, T. T., Frolov, V. V., Fulda, P., Fyffe, M., Gair, Jonathan R., Gammaitoni, L., Gaonkar, S., Garufi, F., Gehrels, N., Gemme, G., Genin, E., Gennai, A., Ghosh, S., Giaime, J. A., Giardina, K. D., Giazotto, A., Gill, C., Gleason, J., Goetz, E., Goetz, R., Gondan, L., González, G., Gordon, N., Gorodetsky, M. L., Gossan, S., Goßler, S., Gouaty, R., Gräf, C., Graff, P. 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Abstract: Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the Universe that is unavailable through standard electromagnetic observations, making its study of fundamental importance to understanding the evolution of the Universe. We carry out a search for the stochastic background with the latest data from the LIGO and Virgo detectors. Consistent with predictions from most stochastic gravitational-wave background models, the data display no evidence of a stochastic gravitational-wave signal. Assuming a gravitational-wave spectrum of Ω[subscript GW](f) = Ω[subscript α](f/f[subscript ref])[superscript α], we place 95% confidence level upper limits on the energy density of the background in each of four frequency bands spanning 41.5–1726 Hz. In the frequency band of 41.5–169.25 Hz for a spectral index of α = 0, we constrain the energy density of the stochastic background to be Ω[subscript GW](f) < 5.6 × 10[superscript -6]. For the 600–1000 Hz band, Ω[subscript GW](f) < 0.14(f/900 Hz)[superscript 3], a factor of 2.5 lower than the best previously reported upper limits. We find Ω[subscript GW](f) < 1.8 × 10[superscript -4] using a spectral index of zero for 170–600 Hz and Ω[subscript GW](f) < 1.0(f/1300 Hz)[superscript 3] for 1000–1726 Hz, bands in which no previous direct limits have been placed. The limits in these four bands are the lowest direct measurements to date on the stochastic background. We discuss the implications of these results in light of the recent claim by the BICEP2 experiment of the possible evidence for inflationary gravitational waves., United States. National Aeronautics and Space Administration, National Science Foundation (U.S.), Carnegie Trust, David & Lucile Packard Foundation, Alfred P. Sloan Foundation
Published: 2014

205. Multimessenger search for sources of gravitational waves and high-energy neutrinos: Initial results for LIGO-Virgo and IceCube

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Aggarwal, Nancy, Barsotti, Lisa, Biscans, Sebastien, Bodiya, Timothy Paul, Buikema, Aaron, Donovan, Frederick J., Essick, Reed Clasey, Evans, Matthew J., Fritschel, Peter K., Gras, Slawek, Isogai, Tomoki, Katsavounidis, Erotokritos, Lee, P. J., Libson, Adam, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Miller, John, Mittleman, Richard K., Oelker, Eric Glenn, Sankar, S., Shoemaker, David H., Vaulin, Ruslan, Vitale, Salvatore, Weiss, Rainer, Wipf, C. C., Yam, William, Zhang, Fan, Zucker, Michael E., Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., Altmann, D., Anderson, T., Arguelles, C., Arlen, T. C., Auffenberg, J., Bai, X., Barwick, S. W., Baum, V., Beatty, J. J., Becker Tjus, J., Becker, K.-H., BenZvi, S., Berghaus, P., Berley, D., Bernardini, E., Bernhard, A., Besson, D. Z., Binder, G., Bindig, D., Bissok, M., Blaufuss, E., Blumenthal, J., Boersma, D. J., Bohm, C., Bos, F., Bose, D., Böser, S., Botner, O., Brayeur, L., Bretz, H.-P., Brown, A. M., Casey, J., Casier, M., Chirkin, D., Christov, A., Christy, B., Clark, K., Classen, L., Clevermann, F., Coenders, S., Cowen, D. F., Cruz Silva, A. H., Danninger, M., Daughhetee, J., Davis, J. C., Day, M., de Andre, J. P. A. M., De Clercq, C., De Ridder, S., Desiati, P., de Vries, K. D., de With, M., DeYoung, T., Díaz-Vélez, J. C., Dunkman, M., Eagan, R., Eberhardt, B., Eichmann, B., Eisch, J., Euler, S., Evenson, P. A., Fadiran, O., Fazely, A. R., Fedynitch, A., Feintzeig, J., Felde, J., Feusels, T., Filimonov, K., Finley, C., Fischer-Wasels, T., Flis, S., Franckowiak, A., Frantzen, K., Fuchs, T., Gaisser, T. K., Gallagher, J. S., Gerhardt, L., Gier, D., Gladstone, L., Glüsenkamp, T., Goldschmidt, A., Golup, G., Gonzalez, J. G., Goodman, J. A., Góra, D., Grandmont, D. T., Grant, D., Gretskov, P., Groh, J. 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B., Karlen, J., Kasprzack, M., Katzman, W., Kaufer, H., Kaufer, S., Kaur, T., Kawabe, K., Kawazoe, F., Kéfélian, F., Keiser, G. M., Keitel, D., Kelley, D. B., Kells, W., Keppel, D. G., Khalaidovski, A., Khalili, F. Y., Khazanov, E. A., Kim, C., Kim, K., Kim, N. G., Kim, N., Kim, S., Kim, Y.-M., King, E. J., King, P. J., Kinzel, D. L., Kissel, J. S., Klimenko, Sergey, Kline, J. L., Koehlenbeck, S., Kokeyama, K., Kondrashov, V., Koranda, S., Korth, W. Z., Kowalska, I., Kozak, D. B., Kringel, V., Królak, A., Kuehn, G., Kumar, A., Kumar, D. Nanda, Kumar, P., Kumar, R., Kuo, L., Kutynia, A., Lam, P. K., Landry, M., Lantz, B., Larson, S., Lasky, P. D., Lazzarini, A., Lazzaro, C., Leaci, P., Leavey, S., Lebigot, E. O., Lee, C. H., Lee, H. K., Lee, H. M., Lee, J., Leonardi, M., Leong, J. R., Le Roux, A., Leroy, N., Letendre, N., Levin, Y., Levine, B., Lewis, J., Li, T. G. F., Libbrecht, K., Lin, A. C., Littenberg, T. B., Lockerbie, N. 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M., Mezzani, F., Miao, H., Michel, C., Mikhailov, E. E., Milano, L., Miller, J., Minenkov, Y., Mingarelli, C. M. F., Mishra, C., Mitra, S., Mitrofanov, V. P., Mitselmakher, G., Moe, B., Moggi, A., Mohan, M., Mohapatra, S. R. P., Moraru, D., Moreno, G., Morgado, N., Morriss, S. R., Mossavi, K., Mours, B., Mow-Lowry, C. M., Mueller, C. L., Mueller, G., Mukherjee, S., Mullavey, A., Munch, J., Murphy, D., Murray, P. G., Mytidis, A., Nagy, M. F., Nardecchia, I., Naticchioni, L., Nayak, R. K., Necula, V., Nelemans, G., Neri, I., Neri, M., Newton, G., Nguyen, T., Nielsen, A. B., Nissanke, S., Nitz, A. H., Nocera, F., Nolting, D., Normandin, M. E. N., Nuttall, L. K., Ochsner, E., O’Dell, J., Oh, J. J., Oh, S. H., Ohme, F., Omar, S., Oppermann, P., Oram, R., O’Reilly, B., Ortega, W., O’Shaughnessy, R., Osthelder, C., Ottaway, D. J., Ottens, R. S., Overmier, H., Owen, B. J., Padilla, C., Pai, A., Palashov, O., Palomba, C., Pan, H., Pan, Y., Pankow, C., Paoletti, F., Papa, M. A., Paris, H., Pasqualetti, A., Passaquieti, R., Passuello, D., Pedraza, M., Pele, A., Penn, S., Perreca, A., Phelps, M., Pichot, M., Pickenpack, M., Piergiovanni, F., Pierro, V., Pinard, L., Pinto, I. M., Pitkin, M., Poeld, J., Poggiani, R., Poteomkin, A., Powell, J., Prasad, J., Predoi, V., Premachandra, S., Prestegard, T., Price, L. R., Prijatelj, M., Privitera, S., Prodi, G. A., Prokhorov, L., Puncken, O., Punturo, M., Puppo, P., Pürrer, M., Qin, J., Quetschke, V., Quintero, E., Quitzow-James, R., Raab, F. J., Rabeling, D. S., Rácz, I., Radkins, H., Raffai, P., Raja, S., Rajalakshmi, G., Rakhmanov, M., Ramet, C., Ramirez, K., Rapagnani, P., Raymond, V., Razzano, M., Re, V., Recchia, S., Reed, C. M., Regimbau, T., Reid, S., Reitze, D. H., Reula, O., Rhoades, E., Ricci, F., Riesen, R., Riles, K., Robertson, N. A., Robinet, F., Rocchi, A., Roddy, S. B., Rolland, L., Rollins, J. G., Romano, R., Romanov, G., Romie, J. H., Rosińska, D., Rowan, S., Rüdiger, A., Ruggi, P., Ryan, K., Salemi, F., Sammut, L., Sandberg, V., Sanders, J. R., Sannibale, V., Santiago-Prieto, I., Saracco, E., Sassolas, B., Sathyaprakash, B. S., Saulson, P. R., Savage, R., Scheuer, J., Schilling, R., Schilman, M., Schmidt, P., Schnabel, R., Schofield, R. M. S., Schreiber, E., Schuette, D., Schutz, B. F., Scott, J., Scott, S. M., Sellers, D., Sengupta, A. S., Sentenac, D., Sequino, V., Sergeev, A., Shaddock, D. A., Shah, S., Shahriar, M. S., Shaltev, M., Shao, Z., Shapiro, B., Shawhan, P., Sidery, T. L., Siellez, K., Siemens, X., Sigg, D., Simakov, D., Singer, A., Singer, L., Singh, R., Sintes, A. M., Slagmolen, B. J. J., Slutsky, J., Smith, J. R., Smith, M. R., Smith, R. J. E., Smith-Lefebvre, N. D., Son, E. J., Sorazu, B., Souradeep, T., Staley, A., Stebbins, J., Steinke, M., Steinlechner, J., Steinlechner, S., Stephens, B. C., Steplewski, S., Stevenson, S., Stone, R., Stops, D., Strain, K. A., Straniero, N., Strigin, S., Sturani, R., Stuver, A. L., Summerscales, T. Z., Susmithan, S., Sutton, P. J., Swinkels, B., Tacca, M., Talukder, D., Tanner, D. B., Tao, J., Tarabrin, S. P., Taylor, R., Tellez, G., Thirugnanasambandam, M. P., Thomas, M., Thomas, P., Thorne, K. A., Thorne, K. S., Thrane, E., Tiwari, V., Tokmakov, K. V., Tomlinson, C., Tonelli, M., Torres, C. V., Torrie, C. I., Travasso, F., Traylor, G., Tse, M., Tshilumba, D., Tuennermann, H., Ugolini, D., Unnikrishnan, C. S., Urban, A. L., Usman, S. A., Vahlbruch, H., Vajente, G., Valdes, G., Vallisneri, M., van Beuzekom, M., van den Brand, J. F. J., Van Den Broeck, C., van der Sluys, M. V., van Heijningen, J., van Veggel, A. A., Vass, S., Vasúth, M., Vecchio, A., Vedovato, G., Veitch, J., Veitch, P. J., Venkateswara, K., Verkindt, D., Vetrano, F., Viceré, A., Vincent-Finley, R., Vinet, J.-Y., Vo, T., Vocca, H., Vorvick, C., Vousden, W. D., Vyachanin, S. P., Wade, A. R., Wade, L., Wade, M., Walker, M., Wallace, L., Walsh, S., Wang, M., Wang, X., Ward, R. L., Was, M., Weaver, B., Wei, L.-W., Weinert, M., Weinstein, A. J., Welborn, T., Wen, L., Wessels, P., West, M., Westphal, T., Wette, K., Whelan, J. T., White, D. J., Whiting, B. F., Wiesner, K., Wilkinson, C., Williams, K., Williams, L., Williams, R., Williams, T. D., Williamson, A. R., Willis, J. L., Willke, B., Wimmer, M., Winkler, W., Wiseman, A. G., Wittel, H., Woan, G., Wolovick, N., Worden, J., Wu, Y., Yablon, J., Yakushin, I., Yamamoto, H., Yancey, C. C., Yang, H., Yvert, M., Zadrożny, A., Zanolin, M., Zendri, J.-P., Zhang, L., Zhao, C., Zhu, H., Zhu, X. J., Zuraw, S., Zweizig, J., Evans, Matthew J, Gras, Slawomir, MacInnis, Myron E, Zucker, Michael E, Wipf, Christopher C., Bodiya, Timothy P., Donovan, Frederick J, Sankar, Shannon Reynier, Fritschel, Peter K, Libson, Adam A., Mason, Kenneth R, Mittleman, Richard K, and Shoemaker, David H
Abstract: We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint operation between 2007–2010. These include parts of the 2005–2007 run and the 2009–2010 run for LIGO-Virgo, and IceCube’s observation periods with 22, 59 and 79 strings. We find no significant coincident events, and use the search results to derive upper limits on the rate of joint sources for a range of source emission parameters. For the optimistic assumption of gravitational-wave emission energy of 10[superscript −2] M[subscript ]c[superscript 2] at ~150 Hz with ~60 ms duration, and high-energy neutrino emission of 10[superscript 51] erg comparable to the isotropic gamma-ray energy of gamma-ray bursts, we limit the source rate below 1.6 × 10[superscript -2] Mpc[superscript −3] yr[superscript −1]. We also examine how combining information from gravitational waves and neutrinos will aid discovery in the advanced gravitational-wave detector era., National Science Foundation (U.S.). Division of Polar Programs, National Science Foundation (U.S.). Physics Division, University of Wisconsin. Alumni Research Foundation, Grid Laboratory of Wisconsin, Open Science Grid, United States. Dept. of Energy, National Energy Research Scientific Computing Center (U.S.), Louisiana Optical Network Initiative
Published: 2014

206. Application of machine learning algorithms to the study of noise artifacts in gravitational-wave data

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, LIGO (Observatory : Massachusetts Institute of Technology), Essick, Reed Clasey, Katsavounidis, Erotokritos, Vaulin, Ruslan, Biswas, Rahul, Blackburn, Lindy L., Cao, Junwei, Hodge, K. A., Kim, Kyungmin, Kim, Young-Min, Le Bigot, Eric-Olivier, Lee, Chang-Hwan, Oh, John J., Oh, Sang Hoon, Son, Edwin J., Wang, Xiaoge, Tao, Ye, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, LIGO (Observatory : Massachusetts Institute of Technology), Essick, Reed Clasey, Katsavounidis, Erotokritos, Vaulin, Ruslan, Biswas, Rahul, Blackburn, Lindy L., Cao, Junwei, Hodge, K. A., Kim, Kyungmin, Kim, Young-Min, Le Bigot, Eric-Olivier, Lee, Chang-Hwan, Oh, John J., Oh, Sang Hoon, Son, Edwin J., Wang, Xiaoge, and Tao, Ye
Abstract: The sensitivity of searches for astrophysical transients in data from the Laser Interferometer Gravitational-wave Observatory (LIGO) is generally limited by the presence of transient, non-Gaussian noise artifacts, which occur at a high enough rate such that accidental coincidence across multiple detectors is non-negligible. These “glitches” can easily be mistaken for transient gravitational-wave signals, and their robust identification and removal will help any search for astrophysical gravitational waves. We apply machine-learning algorithms (MLAs) to the problem, using data from auxiliary channels within the LIGO detectors that monitor degrees of freedom unaffected by astrophysical signals. Noise sources may produce artifacts in these auxiliary channels as well as the gravitational-wave channel. The number of auxiliary-channel parameters describing these disturbances may also be extremely large; high dimensionality is an area where MLAs are particularly well suited. We demonstrate the feasibility and applicability of three different MLAs: artificial neural networks, support vector machines, and random forests. These classifiers identify and remove a substantial fraction of the glitches present in two different data sets: four weeks of LIGO’s fourth science run and one week of LIGO’s sixth science run. We observe that all three algorithms agree on which events are glitches to within 10% for the sixth-science-run data, and support this by showing that the different optimization criteria used by each classifier generate the same decision surface, based on a likelihood-ratio statistic. Furthermore, we find that all classifiers obtain similar performance to the benchmark algorithm, the ordered veto list, which is optimized to detect pairwise correlations between transients in LIGO auxiliary channels and glitches in the gravitational-wave data. This suggests that most of the useful information currently extracted from the auxiliary channels is already described by this, National Science Foundation (U.S.) (Laser Interferometer Gravitational Wave Observatory cooperative Agreement PHY-0757058)
Published: 2014

207. High-rate 256+ Gbit/s laser communications for enhanced high-resolution imaging using space-based very long baseline interferometry (VLBI).

Author: Wang, Jade P., Bilyeu, Bryan, Boroson, Don, Caplan, David, Robinson, Bryan, Schieler, Curt, Johnson, Michael, Blackburn, Lindy, Doeleman, Sheperd, and Haworth, Kari
Published: 2023
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208. X-ray Transients in the Advanced LIGO/Virgo Horizon

Author: Kanner, Jonah, Baker, John, Blackburn, Lindy, Camp, Jordan, Mooley, Kunal, Mushotzky, Richard, Ptak, Andy, Kanner, Jonah, Baker, John, Blackburn, Lindy, Camp, Jordan, Mooley, Kunal, Mushotzky, Richard, and Ptak, Andy
Abstract: Advanced LIGO and Advanced Virgo will be all-sky monitors for merging compact objects within a few hundred Mpc. Finding the electromagnetic counterparts to these events will require an understanding of the transient sky at low red-shift (z<0.1). We performed a systematic search for extragalactic, low red-shift, transient events in the XMM-Newton Slew Survey. In a flux limited sample, we found that highly-variable objects comprised 10% of the sample, and that of these, 10% were spatially coincident with cataloged optical galaxies. This led to 4x10^-4 transients per square degree above a flux threshold of 3x10^-12 erg cm-2 s-1 [0.2-2 keV] which might be confused with LIGO/Virgo counterparts. This represents the first extragalactic measurement of the soft X-ray transient rate within the Advanced LIGO/Virgo horizon. Our search revealed six objects that were spatially coincident with previously cataloged galaxies, lacked evidence for optical AGNs, displayed high luminosities around 10^43 erg s-1, and varied in flux by more than a factor of ten when compared with the ROSAT All-Sky Survey. At least four of these displayed properties consistent with previously observed tidal disruption events., Comment: 10 pages, accepted for publication in ApJ
Published: 2013
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209. Using ISS Telescopes for Electromagnetic Follow-up of Gravitational Wave Detections of NS-NS and NS-BH Mergers

Author: Camp, Jordan, Barthelmy, Scott D., Blackburn, Lindy, Carpenter, Kenneth, Gehrels, Neil, Kanner, Jonah, Marshall, Frank E., Racusin, Judith L., Sakamoto, Takanori, Camp, Jordan, Barthelmy, Scott D., Blackburn, Lindy, Carpenter, Kenneth, Gehrels, Neil, Kanner, Jonah, Marshall, Frank E., Racusin, Judith L., and Sakamoto, Takanori
Abstract: The International Space Station offers a unique platform for rapid and inexpensive deployment of space telescopes. A scientific opportunity of great potential later this decade is the use of telescopes for the electromagnetic follow-up of ground-based gravitational wave detections of neutron star and black hole mergers. We describe this possibility for OpTIIX, an ISS technology demonstration of a 1.5 m diffraction limited optical telescope assembled in space, and ISS-Lobster, a wide-field imaging X-ray telescope now under study as a potential NASA mission. Both telescopes will be mounted on pointing platforms, allowing rapid positioning to the source of a gravitational wave event. Electromagnetic follow-up rates of several per year appear likely, offering a wealth of complementary science on the mergers of black holes and neutron stars.
Published: 2013
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210. Optimizing Vetoes for Gravitational-wave Transient Searches

Author: Essick, Reed, Blackburn, Lindy, Katsavounidis, Erik, Essick, Reed, Blackburn, Lindy, and Katsavounidis, Erik
Abstract: Interferometric gravitational-wave detectors like LIGO, GEO600 and Virgo record a surplus of information above and beyond possible gravitational-wave events. These auxiliary channels capture information about the state of the detector and its surroundings which can be used to infer potential terrestrial noise sources of some gravitational-wave-like events. We present an algorithm addressing the ordering (or equivalently optimizing) of such information from auxiliary systems in gravitational-wave detectors to establish veto conditions in searches for gravitational-wave transients. The procedure was used to identify vetoes for searches for unmodelled transients by the LIGO and Virgo collaborations during their science runs from 2005 through 2007. In this work we present the details of the algorithm; we also use a limited amount of data from LIGO's past runs in order to examine the method, compare it with other methods, and identify its potential to characterize the instruments themselves. We examine the dependence of Receiver Operating Characteristic curves on the various parameters of the veto method and the implementation on real data. We find that the method robustly determines important auxiliary channels, ordering them by the apparent strength of their correlations to the gravitational-wave channel. This list can substantially reduce the background of noise events in the gravitational-wave data. In this way it can identify the source of glitches in the detector as well as assist in establishing confidence in the detection of gravitaional-wave transients., Comment: 18 pages, 8 figures, 2 tables
Published: 2013
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211. Search for gravitational waves from binary black hole inspiral, merger, and ringdown

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Barnum, Sam, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Dwyer, S., Evans, M., Foley, S., Fritschel, Peter K., Harry, Gregory, Hughey, B., Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, A.J., Stein, L.C., Waldman, S.J., Weiss, Rainer, Wipf, Christopher, Zucker, M.E., Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Barnum, Sam, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Dwyer, S., Evans, M., Foley, S., Fritschel, Peter K., Harry, Gregory, Hughey, B., Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, A.J., Stein, L.C., Waldman, S.J., Weiss, Rainer, Wipf, Christopher, and Zucker, M.E.
Abstract: We present the first modeled search for gravitational waves using the complete binary black-hole gravitational waveform from inspiral through the merger and ringdown for binaries with negligible component spin. We searched approximately 2 years of LIGO data, taken between November 2005 and September 2007, for systems with component masses of 1–99M⊙ and total masses of 25–100M⊙. We did not detect any plausible gravitational-wave signals but we do place upper limits on the merger rate of binary black holes as a function of the component masses in this range. We constrain the rate of mergers for 19M⊙≤m₁, m2≤28M⊙ binary black-hole systems with negligible spin to be no more than 2.0 Mpc⁻3 Myr⁻1 at 90% confidence., Alfred P. Sloan Foundation, David & Lucile Packard Foundation, Research Corporation, United States. National Aeronautics and Space Administration, Carnegie Trust, Leverhulme Trust, National Science Foundation (U.S.)
Published: 2013

212. First search for gravitational waves from the youngest known neutron star

Author: Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, Brett Noah, Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Corbitt, Thomas R, Evans, Matthew J, Fritschel, Peter K, MacInnis, Myron E, Mittleman, Richard K, Shoemaker, David H, Bodiya, Timothy P., Donovan, Frederick J, Mason, Kenneth R, Shapiro, B., Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, Brett Noah, Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Corbitt, Thomas R, Evans, Matthew J, Fritschel, Peter K, MacInnis, Myron E, Mittleman, Richard K, Shoemaker, David H, Bodiya, Timothy P., Donovan, Frederick J, Mason, Kenneth R, and Shapiro, B.
Abstract: We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12 day interval taken from the fifth science run of the Laser Interferometer Gravitational-Wave Observatory. It searches gravitational-wave frequencies from 100 to 300 Hz and covers a wide range of first and second frequency derivatives appropriate for the age of the remnant and for different spin-down mechanisms. No gravitational-wave signal was detected. Within the range of search frequencies, we set 95% confidence upper limits of (0.7-1.2) × 10[superscript –24] on the intrinsic gravitational-wave strain, (0.4-4) × 10[superscript –4] on the equatorial ellipticity of the neutron star, and 0.005-0.14 on the amplitude of r-mode oscillations of the neutron star. These direct upper limits beat indirect limits derived from energy conservation and enter the range of theoretical predictions involving crystalline exotic matter or runaway r-modes. This paper is also the first gravitational-wave search to present upper limits on the r-mode amplitude.
Published: 2013

213. Search for Gravitational-wave Inspiral Signals Associated with Short Gamma-ray Bursts During Ligo’s Fifth and Virgo’s First Science Run

Author: Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. School of Science, MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Cao, Jianshu, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, S., Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. School of Science, MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Cao, Jianshu, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, S., Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Matichard, Fabrice, and Mavalvala, Nergis
Abstract: Progenitor scenarios for short gamma-ray bursts (short GRBs) include coalescenses of two neutron stars or a neutron star and black hole, which would necessarily be accompanied by the emission of strong gravitational waves. We present a search for these known gravitational-wave signatures in temporal and directional coincidence with 22 GRBs that had sufficient gravitational-wave data available in multiple instruments during LIGO's fifth science run, S5, and Virgo's first science run, VSR1. We find no statistically significant gravitational-wave candidates within a [ – 5, + 1) s window around the trigger time of any GRB. Using the Wilcoxon-Mann-Whitney U-test, we find no evidence for an excess of weak gravitational-wave signals in our sample of GRBs. We exclude neutron star-black hole progenitors to a median 90% confidence exclusion distance of 6.7 Mpc., Alfred P. Sloan Foundation, David & Lucile Packard Foundation, National Aeronautics and Space Administration, Carnegie Trust, Leverhulme Trust, Research Corporation
Published: 2013

214. Open Issues in the search for gravitational wave transients

Author: Erotokritos Katsavounidis., Massachusetts Institute of Technology. Dept. of Physics., Blackburn, Lindy L, Erotokritos Katsavounidis., Massachusetts Institute of Technology. Dept. of Physics., and Blackburn, Lindy L
Abstract: Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010., Cataloged from PDF version of thesis., Includes bibliographical references (p. 193-201)., The LIGO-Virgo network of kilometer-scale laser interferometric gravitational-wave detectors reached a major milestone with the successful operation of LIGO's fifth (S5) and Virgo's first (VSR1) science runs during 2005-2007. This thesis presents several issues related to gravitational-wave transient detection from the perspective of the joint all-sky, un-triggered burst search over S5/VSR1 data. Existing searches for gravitational-wave bursts must deal with the presence of non-Gaussian noise transients which populate the data over the majority of sensitive signal space. These events may be confused with true signals, and are the current limiting factor in search sensitivity and detection confidence for any real event. The first part of this thesis focuses on the development of tools to identify, monitor and characterize these instrumental disturbances in LIGO and Virgo data. An automated procedure is developed and applied to the S5/VSR1 search in order to safely remove noise transients from the analysis without sacrificing sensitivity by making use of the wealth of auxiliary information recorded by the detectors. The second part of this thesis focuses on the interpretation of outlier events in the context of a non-Gaussian, non-stationary background. An extensive follow-up procedure for candidate gravitational-wave events is developed and applied to a single burst outlier from the S5/VSR1 search, later revealed to be a blind simulation injected into the instruments. While the follow-up procedure correctly finds no reason to reject the candidate as a possible gravitational wave, it highlights the difficulty in making a confident detection for signals with similar waveform morphology to common instrumental disturbances. The follow-up also deals with the problem of objectively defining the significance of a single outlier event in the context of many semi-disjoint individual searches. To address this, a likelihood-ratio based unified ranking is developed and tested ag, by Lindy L. Blackburn, Ph.D.
Published: 2012

215. Observation of a kilogram-scale oscillator near its quantum ground state

Author: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Weiss, Rainer, Bayer, K., Blackburn, Lindy L., Bodiya, Timothy Paul, Brunet, G., Cao, Junwei, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Fritschel, Peter K., Goda, K., Grimaldi, F., Harry, Gregory, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Mavalvala, Nergis, Mittleman, R., Ottaway, David J., Ruet, L., Sarin, P., Shoemaker, David H., Smith, N. D., Stein, Leo Chaim, Wipf, Christopher C., Zucker, Michael E., LIGO Scientific Collaboration, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Weiss, Rainer, Bayer, K., Blackburn, Lindy L., Bodiya, Timothy Paul, Brunet, G., Cao, Junwei, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Fritschel, Peter K., Goda, K., Grimaldi, F., Harry, Gregory, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Mavalvala, Nergis, Mittleman, R., Ottaway, David J., Ruet, L., Sarin, P., Shoemaker, David H., Smith, N. D., Stein, Leo Chaim, Wipf, Christopher C., Zucker, Michael E., and LIGO Scientific Collaboration
Abstract: We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system—an interferometric gravitational wave detector. The detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) operate within a factor of 10 of the standard quantum limit (SQL), providing a displacement sensitivity of 10[superscript −18] m in a 100 Hz band centered on 150 Hz. With a new feedback strategy, we dynamically shift the resonant frequency of a 2.7 kg pendulum mode to lie within this optimal band, where its effective temperature falls as low as 1.4 μK, and its occupation number reaches about 200 quanta. This work shows how the exquisite sensitivity necessary to detect gravitational waves can be made available to probe the validity of quantum mechanics on an enormous mass scale., Alfred P. Sloan Foundation, United States. National Aeronautics and Space Administration, David & Lucile Packard Foundation, Research Corporation, National Science Foundation (U.S.)
Published: 2012

216. Directional Limits on Persistent Gravitational Waves Using LIGO S5 Science Data

Author: Kavli Institute for Astrophysics and Space Research, Laser Interferometer Gravitational-Wave Observatory, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, Barsotti, Lisa, Barnum, Sam, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Toksoz, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, R., Wipf, Christopher C., Zucker, Michael E., Mavalvala, Nergis, Kavli Institute for Astrophysics and Space Research, Laser Interferometer Gravitational-Wave Observatory, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, Barsotti, Lisa, Barnum, Sam, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Toksoz, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, R., Wipf, Christopher C., Zucker, Michael E., and Mavalvala, Nergis
Abstract: The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2-20×10p[superscript -50] strain[superscript 2] Hz[superscript -1] and 5-35×10[superscript -49] strain[superscript 2] Hz[superscript -1] sr[superscript -1] for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as ≈7×10[superscript -25] in the most sensitive frequency range near 160 Hz., Research Corporation, David & Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, United States. National Aeronautics and Space Administration, Alfred P. Sloan Foundation, National Science Foundation (U.S.)
Published: 2012

217. Directional Limits on Persistent Gravitational Waves Using LIGO S5 Science Data

Author: Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Barnum, Sam, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Toksoz, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, R., Wipf, Christopher C., Zucker, Michael E., Mavalvala, Nergis, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Barnum, Sam, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Toksoz, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, R., Wipf, Christopher C., Zucker, Michael E., and Mavalvala, Nergis
Abstract: The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2-20×10p[superscript -50] strain[superscript 2] Hz[superscript -1] and 5-35×10[superscript -49] strain[superscript 2] Hz[superscript -1] sr[superscript -1] for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as ≈7×10[superscript -25] in the most sensitive frequency range near 160 Hz., Research Corporation, David & Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, United States. National Aeronautics and Space Administration, Alfred P. Sloan Foundation, National Science Foundation (U.S.)
Published: 2012

218. Search for gravitational waves from binary black hole inspiral, merger, and ringdown

Author: Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Shoemaker, David H, Barnum, Sam, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, Brett Noah, Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., Zucker, Michael E., Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Shoemaker, David H, Barnum, Sam, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, Brett Noah, Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., and Zucker, Michael E.
Abstract: We present the first modeled search for gravitational waves using the complete binary black-hole gravitational waveform from inspiral through the merger and ringdown for binaries with negligible component spin. We searched approximately 2 years of LIGO data, taken between November 2005 and September 2007, for systems with component masses of 1–99M⊙ [1-99 M circled dot operator] and total masses of 25–100M⊙ [25-100 M circled dot operator]. We did not detect any plausible gravitational-wave signals but we do place upper limits on the merger rate of binary black holes as a function of the component masses in this range. We constrain the rate of mergers for 19M⊙≤m1 [19 M circled dot operator greater than or equal to m subscript 1], m2≤28M⊙ [m subscript 2 greater than or equal to 28 M circled dot operator] binary black-hole systems with negligible spin to be no more than 2.0 Mpc-3 {Mpc superscript -3] Myr-1 [Myr superscript -1] at 90% confidence., National Science Foundation (U.S.), United States. National Aeronautics and Space Administration, Carnegie Trust, Leverhulme Trust, David & Lucile Packard Foundation, Research Corporation, Alfred P. Sloan Foundation
Published: 2011

219. Search for gravitational waves from compact binary coalescence in LIGO and Virgo data from S5 and VSR1

Author: Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., Zucker, Michael E., Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., and Zucker, Michael E.
Abstract: We report the results of the first search for gravitational waves from compact binary coalescence using data from the Laser Interferometer Gravitational-Wave Observatory and Virgo detectors. Five months of data were collected during the Laser Interferometer Gravitational-Wave Observatory’s S5 and Virgo’s VSR1 science runs. The search focused on signals from binary mergers with a total mass between 2 and 35M⊙. No gravitational waves are identified. The cumulative 90%-confidence upper limits on the rate of compact binary coalescence are calculated for nonspinning binary neutron stars, black hole-neutron star systems, and binary black holes to be 8.7×10-3 yr-1 L10-1, 2.2×10-3 yr-1 L10-1, and 4.4×10-4 yr-1 L10-1, respectively, where L10 is 1010 times the blue solar luminosity. These upper limits are compared with astrophysical expectations., National Science Foundation (U.S.), United States. National Aeronautics and Space Administration, Carnegie Trust, Leverhulme Trust, David & Lucile Packard Foundation, Alfred P. Sloan Foundation, Research Corporation
Published: 2011

220. Search for gravitational waves associated with the August 2006 timing glitch of the Vela pulsar

Author: Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Cao, Jianshu, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Sarin, P., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., Zucker, Michael E., Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Cao, Jianshu, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Sarin, P., Shapiro, B., Shoemaker, David H., Smith, N. D., Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., and Zucker, Michael E.
Abstract: The physical mechanisms responsible for pulsar timing glitches are thought to excite quasinormal mode oscillations in their parent neutron star that couple to gravitational-wave emission. In August 2006, a timing glitch was observed in the radio emission of PSR B0833-45, the Vela pulsar. At the time of the glitch, the two colocated Hanford gravitational-wave detectors of the Laser Interferometer Gravitational-wave observatory (LIGO) were operational and taking data as part of the fifth LIGO science run (S5). We present the first direct search for the gravitational-wave emission associated with oscillations of the fundamental quadrupole mode excited by a pulsar timing glitch. No gravitational-wave detection candidate was found. We place Bayesian 90% confidence upper limits of 6.3×10-21 to 1.4×10-20 on the peak intrinsic strain amplitude of gravitational-wave ring-down signals, depending on which spherical harmonic mode is excited. The corresponding range of energy upper limits is 5.0×1044 to 1.3×1045 erg., David & Lucile Packard Foundation, United States. National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Carnegie Trust, National Science Foundation (U.S.), Research Corporation, Leverhulme Trust
Published: 2011

221. First LIGO search for gravitational wave bursts from cosmic (super)strings

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, and Bodiya, Timothy P.
Abstract: We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No gravitational waves were detected in 14.9 days of data from times when all three LIGO detectors were operating. We interpret the result in terms of a frequentist upper limit on the rate of gravitational wave bursts and use the limits on the rate to constrain the parameter space (string tension, reconnection probability, and loop sizes) of cosmic string models. Many grand unified theory-scale models (with string tension Gμ/c[superscript 2]≈10[superscript -6]) can be ruled out at 90% confidence for reconnection probabilities p≤10[superscript -3] if loop sizes are set by gravitational back reaction., Research Corporation, Alfred P. Sloan Foundation, David and Lucile Packard Foundation, Leverhulme Trust, Alexander von Humboldt Foundation, John Simon Guggenheim Foundation, National Aeronautics and Space Administration, Spanish Ministerio de Educacion y Ciencia, Department of Science and Technology of India, Council of Scientific and Industrial Research of India, Natural Sciences and Engineering Research Council of Canada, Australian Research Council, State of Niedersachsen/Germany, Max-Planck-Society, Particle Physics and Astronomy Research Council of the United Kingdom, United States National Science Foundation
Published: 2010

222. Einstein@Home search for periodic gravitational waves in early S5 LIGO data

Author: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Corbitt, Thomas R., Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Brunet, G., Cao, Junwei, Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Goda, K., Grimaldi, F., Harry, Gregory, Hughey, Brennan J., Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Mittleman, Richard K., Sarin, P., Shapiro, B., Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., Zucker, Michael E., Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Corbitt, Thomas R., Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Brunet, G., Cao, Junwei, Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Goda, K., Grimaldi, F., Harry, Gregory, Hughey, Brennan J., Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Mittleman, Richard K., Sarin, P., Shapiro, B., Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, Wipf, Christopher C., and Zucker, Michael E.
Abstract: This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the fifth LIGO science run (S5). The data were searched for quasimonochromatic waves with frequencies f in the range from 50 to 1500 Hz, with a linear frequency drift f˙ (measured at the solar system barycenter) in the range -f/τ
Published: 2010

223. First LIGO search for gravitational wave bursts from cosmic (super)strings

Author: Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology. Department of Physics, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., and Barsotti, Lisa
Abstract: We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No gravitational waves were detected in 14.9 days of data from times when all three LIGO detectors were operating. We interpret the result in terms of a frequentist upper limit on the rate of gravitational wave bursts and use the limits on the rate to constrain the parameter space (string tension, reconnection probability, and loop sizes) of cosmic string models. Many grand unified theory-scale models (with string tension Gμ/c[superscript 2]≈10[superscript -6]) can be ruled out at 90% confidence for reconnection probabilities p≤10[superscript -3] if loop sizes are set by gravitational back reaction., Research Corporation, Alfred P. Sloan Foundation, David and Lucile Packard Foundation, Leverhulme Trust, Alexander von Humboldt Foundation, John Simon Guggenheim Foundation, National Aeronautics and Space Administration, Spanish Ministerio de Educacion y Ciencia, Department of Science and Technology of India, Council of Scientific and Industrial Research of India, Natural Sciences and Engineering Research Council of Canada, Australian Research Council, State of Niedersachsen/Germany, Max-Planck-Society, Particle Physics and Astronomy Research Council of the United Kingdom, United States National Science Foundation
Published: 2010

224. Search for gravitational-wave bursts in the first year of the fifth LIGO science run

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K, Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Mittleman, Richard K., Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K, Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, and Mittleman, Richard K.
Abstract: We present the results obtained from an all-sky search for gravitational-wave (GW) bursts in the 64–2000 Hz frequency range in data collected by the LIGO detectors during the first year (November 2005—November 2006) of their fifth science run. The total analyzed live time was 268.6 days. Multiple hierarchical data analysis methods were invoked in this search. The overall sensitivity expressed in terms of the root-sum-square (rss) strain amplitude h[subscript rss] for gravitational-wave bursts with various morphologies was in the range of 6×10[superscript -22] Hz[superscript -1/2] to a few×10-[superscript 21] Hz[superscript -1/2]. No GW signals were observed and a frequentist upper limit of 3.75 events per year on the rate of strong GW bursts was placed at the 90% confidence level. As in our previous searches, we also combined this rate limit with the detection efficiency for selected waveform morphologies to obtain event rate versus strength exclusion curves. In sensitivity, these exclusion curves are the most stringent to date., Alfred P. Sloan Foundation, Research Corporation, David and Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, National Aeronautics and Space Administration, Scottish Universities Physics Alliance, Scottish Funding Council, Royal Society, United Kingdom, Conselleria d’Economia Hisenda i Innovació of the Govern de les Illes Balears, Spanish Ministerio de Educación y Ciencia, Istituto Nazionale di Fisica Nucleare of Italy, Council of Scientific and Industrial Research of India, Australian Research Council, State of Niedersachsen in Germany, Max-Planck-Society, Science and Technology Facilities Council of the United Kingdom, National Science Foundation
Published: 2010

225. All-Sky LIGO Search for Periodic Gravitational Waves in the Early Fifth-Science-Run Data

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Stein, Leo Chaim, Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Ruet, L., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Shoemaker, David H, Mittleman, Richard K, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Bodiya, Timothy P., Zucker, Michael E, Ruet, Laurent, Mason, Kenneth R, MacInnis, Myron E, Corbitt, Thomas R, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Stein, Leo Chaim, Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Ruet, L., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Shoemaker, David H, Mittleman, Richard K, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Bodiya, Timothy P., Zucker, Michael E, Ruet, Laurent, Mason, Kenneth R, MacInnis, Myron E, and Corbitt, Thomas R
Abstract: We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50–1100 Hz and with the frequency’s time derivative in the range -5×10[superscript -9]–0 Hz s[superscript -1]. Data from the first eight months of the fifth LIGO science run (S5) have been used in this search, which is based on a semicoherent method (PowerFlux) of summing strain power. Observing no evidence of periodic gravitational radiation, we report 95% confidence-level upper limits on radiation emitted by any unknown isolated rotating neutron stars within the search range. Strain limits below 10[superscript -24] are obtained over a 200-Hz band, and the sensitivity improvement over previous searches increases the spatial volume sampled by an average factor of about 100 over the entire search band. For a neutron star with nominal equatorial ellipticity of 10[superscript -6], the search is sensitive to distances as great as 500 pc., Alfred P. Sloan Foundation, Research Corporation, David and Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, National Aeronautics and Space Administration, Scottish Universities Physics Alliance, Scottish Funding Council, Royal Society, United Kingdom, Conselleria d’Economia, Hisenda i Innovació of the Govern de les Illes Balears, Ministerio de Ciencia e Innovación, Spain, Istituto Nazionale di Fisica Nucleare of Italy, Council of Scientific and Industrial Research of India, Australian Research Council, State of Niedersachsen, Germany, Max Planck Society for the Advancement of Science, Science and Technology Facilities Council, United Kingdom, National Science Foundation
Published: 2010

226. All-sky search for gravitational-wave bursts in the first joint LIGO-GEO-Virgo run

Author: Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. School of Science, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Weiss, Rainer, Zucker, Michael E., Wipf, Christopher C., Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mavalvala, Nergis, Matichard, Fabrice, Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. School of Science, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Weiss, Rainer, Zucker, Michael E., Wipf, Christopher C., Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mavalvala, Nergis, Matichard, Fabrice, Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, and Bodiya, Timothy P.
Abstract: We present results from an all-sky search for unmodeled gravitational-wave bursts in the data collected by the LIGO, GEO 600 and Virgo detectors between November 2006 and October 2007. The search is performed by three different analysis algorithms over the frequency band 50–6000 Hz. Data are analyzed for times with at least two of the four LIGO-Virgo detectors in coincident operation, with a total live time of 266 days. No events produced by the search algorithms survive the selection cuts. We set a frequentist upper limit on the rate of gravitational-wave bursts impinging on our network of detectors. When combined with the previous LIGO search of the data collected between November 2005 and November 2006, the upper limit on the rate of detectable gravitational-wave bursts in the 64–2048 Hz band is 2.0 events per year at 90% confidence. We also present event rate versus strength exclusion plots for several types of plausible burst waveforms. The sensitivity of the combined search is expressed in terms of the root-sum-squared strain amplitude for a variety of simulated waveforms and lies in the range 6×10[superscript -22] Hz[superscript -1/2] to 2×10[superscript -20 ] Hz[superscript -1/2]. This is the first untriggered burst search to use data from the LIGO and Virgo detectors together, and the most sensitive untriggered burst search performed so far., National Science Foundation, Science and Technology Facilities Council, United Kingdom, Australian Research Council, Istituto Nazionale di Fisica Nucleare of Italy, Max Planck Society for the Advancement of Science, State of Niedersachsen, Germany, Institut National de Physique Nucléaire and de Physique des Particules, Australian Research Council, Council of Scientific and Industrial Research of India, MEC (Spain), Conselleria d’Economia, Hisenda i Innovació of the Govern de les Illes Balears, FOM of the Netherlands, Polish Ministry of Science and Higher Education, Foundation for Polish Science, Royal Society, United Kingdom, Scottish Funding Council, Scottish Universities Physics Alliance, National Aeronautics and Space Administration, Carnegie Trust, David and Lucile Packard Foundation, Alfred P. Sloan Foundation, Research Corporation
Published: 2010

227. Search for gravitational wave ringdowns from perturbed black holes in LIGO S4 data

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Ruet, L., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Zucker, Michael E, Shoemaker, David H, Ruet, Laurent, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Ruet, L., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Zucker, Michael E, Shoemaker, David H, Ruet, Laurent, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, and Evans, Matthew J
Abstract: According to general relativity a perturbed black hole will settle to a stationary configuration by the emission of gravitational radiation. Such a perturbation will occur, for example, in the coalescence of a black hole binary, following their inspiral and subsequent merger. At late times the waveform is a superposition of quasinormal modes, which we refer to as the ringdown. The dominant mode is expected to be the fundamental mode, l=m=2. Since this is a well-known waveform, matched filtering can be implemented to search for this signal using LIGO data. We present a search for gravitational waves from black hole ringdowns in the fourth LIGO science run S4, during which LIGO was sensitive to the dominant mode of perturbed black holes with masses in the range of 10M[subscript ⊙] to 500M[subscript ⊙], the regime of intermediate-mass black holes, to distances up to 300 Mpc. We present a search for gravitational waves from black hole ringdowns using data from S4. No gravitational wave candidates were found; we place a 90%-confidence upper limit on the rate of ringdowns from black holes with mass between 85M[subscript ⊙] and 390M[subscript ⊙] in the local universe, assuming a uniform distribution of sources, of 3.2×10[superscript -5] yr[superscript -1] Mpc[superscript -3]=1.6×10[superscript -3] yr[superscript -1]L10[superscript -1],where L[subscript 10] is 10[superscript 10] times the solar blue-light luminosity., Alfred P. Sloan Foundation, Research Corporation, David and Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, National Aeronautics and Space Administration, Scottish Universities Physics Alliance, Scottish Funding Council, Conselleria d’Economia, Hisenda i Innovació of the Govern de les Illes Balears, Ministerio de Ciencia e Innovación, Spain, Istituto Nazionale di Fisica Nucleare of Italy, Council of Scientific and Industrial Research of India, Australian Research Council, State of Niedersachsen, Germany, Max Planck Society for the Advancement of Science, Science and Technology Facilities Council, United Kingdom, National Science Foundation
Published: 2010

228. Search for gravitational waves from low mass compact binary coalescence in 186 days of LIGO’s fifth science run

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Mittleman, Richard K, Corbitt, Thomas R, Shoemaker, David H, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Bodiya, Timothy P., Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Mittleman, Richard K, Corbitt, Thomas R, Shoemaker, David H, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, and Bodiya, Timothy P.
Abstract: We report on a search for gravitational waves from coalescing compact binaries, of total mass between 2 and 35M[subscript ⊙], using LIGO observations between November 14, 2006 and May 18, 2007. No gravitational-wave signals were detected. We report upper limits on the rate of compact binary coalescence as a function of total mass. The LIGO cumulative 90%-confidence rate upper limits of the binary coalescence of neutron stars, black holes and black hole-neutron star systems are 1.4×10[superscript -2], 7.3×10[superscript -4] and 3.6×10[superscript -3] yr[superscript -1] L[subscript 10][superscript -1], respectively, where L[subscript 10] is 10[superscript 10] times the blue solar luminosity., Alfred P. Sloan Foundation, Research Corporation, David and Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, National Aeronautics and Space Administration, Scottish Universities Physics Alliance, Scottish Funding Council, Royal Society, United Kingdom, Conselleria d’Economia, Hisenda i Innovació of the Govern de les Illes Balears, Ministerio de Ciencia e Innovación, Spain, Istituto Nazionale di Fisica Nucleare of Italy, Council of Scientific and Industrial Research of India, Australian Research Council, State of Niedersachsen/Germany, Max Planck Society for the Advancement of Science, Science and Technology Facilities Council, United Kingdom, National Science Foundation
Published: 2010

229. Search for high frequency gravitational-wave bursts in the first calendar year of LIGO's fifth science run

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Villadsen, J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Villadsen, J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, and Mason, Kenneth R
Abstract: We present an all-sky search for gravitational waves in the frequency range 1 to 6 kHz during the first calendar year of LIGO’s fifth science run. This is the first untriggered LIGO burst analysis to be conducted above 3 kHz. We discuss the unique properties of interferometric data in this regime. 161.3 days of triple-coincident data were analyzed. No gravitational events above threshold were observed and a frequentist upper limit of 5.4 year[superscript -1] on the rate of strong gravitational-wave bursts was placed at a 90% confidence level. Implications for specific theoretical models of gravitational-wave emission are also discussed., Alfred P. Sloan Foundation, Research Corporation, David and Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, National Aeronautics and Space Administration, Scottish Universities Physics Alliance, Scottish Funding Council, Royal Society, United Kingdom, Conselleria d’Economia Hisenda i Innovació of the Govern de les Illes Balears, Spanish Ministerio de Educación y Ciencia, Istituto Nazionale di Fisica Nucleare of Italy, Council of Scientific and Industrial Research of India, Australian Research Council, State of Niedersachsen in Germany, Max-Planck-Society, Science and Technology Facilities Council of the United Kingdom, National Science Foundation
Published: 2010

230. Search for gravitational waves from low mass binary coalescences in the first year of LIGO’s S5 data

Author: Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, Bodiya, Timothy P., Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Mavalvala, Nergis, Zucker, Michael E., Wipf, Christopher C., Weiss, Rainer, Waldman, Samuel J., Stein, Leo Chaim, Stein, Andrew J., Smith, Nicolas de Mateo, Shoemaker, David H., Shapiro, B., Sarin, P., Mittleman, Richard K., Mason, Kenneth R., Markowitz, Jared John, MacInnis, Myron E., Katsavounidis, Erotokritos, Hughey, Brennan J., Harry, Gregory, Grimaldi, F., Goda, K., Fritschel, Peter K., Foley, Stephany, Evans, Matthew J., Duke, I., Donovan, Frederick J., Corbitt, Thomas R., Cao, Junwei, Brunet, G., Bodiya, Timothy Paul, Blackburn, Lindy L., Barsotti, Lisa, Zucker, Michael E, Shoemaker, David H, Mittleman, Richard K, Mason, Kenneth R, MacInnis, Myron E, Fritschel, Peter K, Evans, Matthew J, Donovan, Frederick J, Corbitt, Thomas R, and Bodiya, Timothy P.
Abstract: We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M[subscript ⊙] and 35M[subscript ⊙] and a minimum component mass of 1M[subscript ⊙] using data from the first year of the fifth science run of the three LIGO detectors, operating at design sensitivity. Depending on the mass, we are sensitive to coalescences as far as 150 Mpc from the Earth. No gravitational-wave signals were observed above the expected background. Assuming a population of compact binary objects with a Gaussian mass distribution representing binary neutron star systems, black hole–neutron star binary systems, and binary black hole systems, we calculate the 90% confidence upper limit on the rate of coalescences to be 3.9×10[superscript -2] yr-1L[subscript 10][superscript -1], 1.1×10[superscript -2] yr-1L[subscript 10][superscript -1], and 2.5×10[superscript -3] yr-1L[subscript 10][superscript -1], respectively, where L[subscript 10] is 10[superscript 10] times the blue solar luminosity. We also set improved upper limits on the rate of compact binary coalescences per unit blue-light luminosity, as a function of mass., Alfred P. Sloan Foundation, Research Corporation, David and Lucile Packard Foundation, Leverhulme Trust, Carnegie Trust, National Aeronautics and Space Administration, Scottish Universities Physics Alliance, Scottish Funding Council, Royal Society, United Kingdom, Conselleria d’Economia, Hisenda i Innovació of the Govern de les Illes Balears, Ministerio de Ciencia e Innovación, Spain, Istituto Nazionale di Fisica Nucleare of Italy, Council of Scientific and Industrial Research of India, Australian Research Council, State of Niedersachsen, Germany, Max Planck Society for the Advancement of Science, Science and Technology Facilities Council, United Kingdom, National Science Foundation
Published: 2010

231. Application of machine learning algorithms to the study of noise artifacts in gravitational-wave data

Author: Biswas, Rahul, primary, Blackburn, Lindy, additional, Cao, Junwei, additional, Essick, Reed, additional, Hodge, Kari Alison, additional, Katsavounidis, Erotokritos, additional, Kim, Kyungmin, additional, Kim, Young-Min, additional, Le Bigot, Eric-Olivier, additional, Lee, Chang-Hwan, additional, Oh, John J., additional, Oh, Sang Hoon, additional, Son, Edwin J., additional, Tao, Ye, additional, Vaulin, Ruslan, additional, and Wang, Xiaoge, additional
Published: 2013
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232. X-RAY TRANSIENTS IN THE ADVANCED LIGO/VIRGO HORIZON

Author: Kanner, Jonah, primary, Baker, John, additional, Blackburn, Lindy, additional, Camp, Jordan, additional, Mooley, Kunal, additional, Mushotzky, Richard, additional, and Ptak, Andy, additional
Published: 2013
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233. High-rate 256+ Gbit/s laser communications for enhanced high-resolution imaging using space-based very long baseline interferometry (VLBI)

Author: Hemmati, Hamid, Robinson, Bryan S., Wang, Jade P., Bilyeu, Bryan, Boroson, Don, Caplan, David, Robinson, Bryan, Schieler, Curt, Johnson, Michael, Blackburn, Lindy, Doeleman, Sheperd, and Haworth, Kari
Published: 2023
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234. The Event Horizon Explorer mission concept.

Author: Kurczynski, Peter, Johnson, Michael D., Doeleman, Sheperd S., Haworth, Kari, Peretz, Eliad, Sridharan, Tirupati Kumara, Bilyeu, Byran, Blackburn, Lindy, Boroson, Don, Brosius, Alexandra, Butler, Richard, Caplan, Dave, Chatterjee, Koushik, Cheimets, Peter, D'Orazio, Daniel, Essinger-Hileman, Thomas, Galison, Peter, Gamble, Ronald, Hadar, Shahar, and Hoerbelt, Tiffany
Published: 2022
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235. Persistent Asymmetric Structure of Sagittarius A* on Event Horizon Scales

Author: Fish, Vincent, Johnson, Michael D., Doeleman, Sheperd S., Broderick, Avery, Psaltis, Dimitrios, Lu, Ru-Sen, Akiyama, Kazunori, Alef, Walter, Algaba, Juan, Asada, Keiichi, Beaudoin, Christopher, Bertarini, Alessandra, Blackburn, Lindy, Blundell, Raymond, Bower, Geoffrey, Brinkerink, Christiaan, Cappallo, Roger, Chael, Andrew Alan, Chamberlin, Richard, Chan, Chi-Kwan, Crew, Geoffrey, Dexter, Jason, Dexter, Matt, Dzib, Sergio, Falcke, Heino, Freund, Robert, Friberg, Per, Greer, Christopher, Gurwell, Mark Andrew, Ho, Paul, Honma, Mareki, Inoue, Makoto, Johannsen, Tim, Kim, Junhan, Krichbaum, Thomas, Lamb, James, León-Tavares, Jonathan, Loeb, Abraham, Loinard, Laurent, MacMahon, David, Marrone, Daniel, Moran, James M., Mościbrodzka, Monika, Ortiz-León, Gisela, Oyama, Tomoaki, and Özel, Feryal
Abstract: The Galactic Center black hole Sagittarius A* (Sgr A*) is a prime observing target for the Event Horizon Telescope (EHT), which can resolve the 1.3 mm emission from this source on angular scales comparable to that of the general relativistic shadow. Previous EHT observations have used visibility amplitudes to infer the morphology of the millimeter-wavelength emission. Potentially much richer source information is contained in the phases. We report on 1.3 mm phase information on Sgr A* obtained with the EHT on a total of 13 observing nights over 4 years. Closure phases, the sum of visibility phases along a closed triangle of interferometer baselines, are used because they are robust against phase corruptions introduced by instrumentation and the rapidly variable atmosphere. The median closure phase on a triangle including telescopes in California, Hawaii, and Arizona is nonzero. This result conclusively demonstrates that the millimeter emission is asymmetric on scales of a few Schwarzschild radii and can be used to break 180-degree rotational ambiguities inherent from amplitude data alone. The stability of the sign of the closure phase over most observing nights indicates persistent asymmetry in the image of Sgr A* that is not obscured by refraction due to interstellar electrons along the line of sight., Astronomy
Published: 2016
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236. First M87 Event Horizon Telescope Results and the Role of ALMA

Author: Goddi, Ciriaco, Crew, Geoff, Impellizzeri, Violette, Martí-Vidal, Iván, Matthews, Lynn D., Messias, Hugo, Rottmann, Helge, Alef, Walter, Blackburn, Lindy, Bronzwaer, Thomas, Chan, Chi-Kwan, Davelaar, Jordy, Deane, Roger, Dexter, Jason, Doeleman, Shep, Falcke, Heino, Fish, Vincent L., Fraga-Encinas, Raquel, Fromm, Christian M., Herrero-Illana, Ruben, Issaoun, Sara, James, David, Janssen, Michael, Kramer, Michael, Krichbaum, Thomas P., De Laurentis, Mariafelicia, Liuzzo, Elisabetta, Mizuno, Yosuke, Moscibrodzka, Monika, Natarajan, Iniyan, Porth, Oliver, Rezzolla, Luciano, Rygl, Kazi, Roelofs, Freek, Ros, Eduardo, Roy, Alan L., Shao, Lijing, Van Langevelde, Huib Jan, Van Bemmel, Ilse, Tilanus, Remo, Torne, Pablo, Wielgus, Maciek, Younsi, Ziri, Zensus, J. Anton, and Collaboration, The Event Horizon Telescope
Subjects: 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, 0103 physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 010303 astronomy & astrophysics, 01 natural sciences, Astrophysics::Galaxy Astrophysics
Abstract: In April 2019, the Event Horizon Telescope (EHT) collaboration revealed the first image of the candidate super- massive black hole (SMBH) at the centre of the giant elliptical galaxy Messier 87 (M87). This event-horizon-scale image shows a ring of glowing plasma with a dark patch at the centre, which is interpreted as the shadow of the black hole. This breakthrough result, which represents a powerful confirmation of Einstein’s theory of gravity, or general relativity, was made possible by assembling a global network of radio telescopes operating at millimetre wavelengths that for the first time included the Atacama Large Millimeter/submillimeter Array (ALMA). The addition of ALMA as an anchor station has enabled a giant leap forward by increasing the sensitivity limits of the EHT by an order of magnitude, effectively turning it into an imaging array. The published image demonstrates that it is now possible to directly study the event horizon shadows of SMBHs via electromagnetic radiation, thereby transforming this elusive frontier from a mathematical concept into an astrophysical reality. The expansion of the array over the next few years will include new stations on different continents — and eventually satellites in space. This will provide progressively sharper and higher-fidelity images of SMBH candidates, and potentially even movies of the hot plasma orbiting around SMBHs. These improvements will shed light on the processes of black hole accretion and jet formation on event-horizon scales, thereby enabling more precise tests of general relativity in the truly strong field regime., Published in The Messenger vol. 177, pp. 25-35, September 2019.

237. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

Author: Algaba, J. C., Anczarski, J., Asada, K., Baloković, M., Chandra, S., Cui, Y.-Z., Falcone, A. D., Giroletti, M., Goddi, C., Hada, K., Haggard, D., Jorstad, S., Kaur, A., Kawashima, T., Keating, G., Kim, J.-Y., Kino, M., Komossa, S., Kravchenko, E. V., Krichbaum, T. P., Lee, S.-S., Lu, R.-S., Lucchini, M., Markoff, S., Neilsen, J., Nowak, M. A., Park, J., Principe, G., Ramakrishnan, V., Reynolds, M. T., Sasada, M., Savchenko, S. S., Williamson, K. E., Hirota, Tomoya, Cui, Lang, Niinuma, Kotaro, Ro, Hyunwook, Sakai, Nobuyuki, Sawada-Satoh, Satoko, Wajima, Kiyoaki, Wang, Na, Liu, Xiang, Yonekura, Yoshinori, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Barrett, John, Bintley, Dan, Benson, Bradford A., Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E., Broguiere, Dominique, Bronzwaer, Thomas, Byun, Do-Young, Carlstrom, John E., Chael, Andrew, Chan, Chi-kwan, Chatterjee, Shami, Chatterjee, Koushik, Chen, Ming-Tang, Chen, Yongjun, Chesler, Paul M., Cho, Ilje, Christian, Pierre, Conway, John E., Cordes, James M., Crawford, Thomas M., Crew, Geoffrey B., Cruz-Osorio, Alejandro, Davelaar, Jordy, De Laurentis, Mariafelicia, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Dexter, Jason, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Farah, Joseph, Fish, Vincent L., Fomalont, E., Alyson Ford, H., Fraga-Encinas, Raquel, Friberg, Per, Fromm, Christian M., Fuentes, Antonio, Galison, Peter, Gammie, Charles F., García, Roberto, Gentaz, Olivier, Georgiev, Boris, Gold, Roman, Gómez, José L., Gómez-Ruiz, Arturo I., Gu, Minfeng, Gurwell, Mark, Hecht, Michael H., Hesper, Ronald, Ho, Luis C., Ho, Paul, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Ikeda, Shiro, Inoue, Makoto, Issaoun, Sara, James, David J., Jannuzi, Buell T., Janssen, Michael, Jeter, Britton, Jiang, Wu, Jimenez-Rosales, Alejandra, Johnson, Michael D., Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kettenis, Mark, Kim, Dong-Jin, Kim, Jongsoo, Kim, Junhan, Koay, Jun Yi, Kofuji, Yutaro, Koch, Patrick M., Koyama, Shoko, Kramer, Michael, Kramer, Carsten, Kuo, Cheng-Yu, Lauer, Tod R., Levis, Aviad, Li, Yan-Rong, Li, Zhiyuan, Lindqvist, Michael, Lico, Rocco, Lindahl, Greg, Liu, Jun, Liu, Kuo, Liuzzo, Elisabetta, Lo, Wen-Ping, Lobanov, Andrei P., Loinard, Laurent, Lonsdale, Colin, MacDonald, Nicholas R., Mao, Jirong, Marchili, Nicola, Marrone, Daniel P., Marscher, Alan P., Martí-Vidal, Iván, Matsushita, Satoki, Matthews, Lynn D., Medeiros, Lia, Menten, Karl M., Mizuno, Izumi, Mizuno, Yosuke, Moran, James M., Moriyama, Kotaro, Moscibrodzka, Monika, Müller, Cornelia, Musoke, Gibwa, Mejías, Alejandro Mus, Nagai, Hiroshi, Nagar, Neil M., Nakamura, Masanori, Narayan, Ramesh, Narayanan, Gopal, Natarajan, Iniyan, Nathanail, Antonios, Neri, Roberto, Ni, Chunchong, Noutsos, Aristeidis, Okino, Hiroki, Olivares, Héctor, Ortiz-León, Gisela N., Oyama, Tomoaki, Özel, Feryal, Palumbo, Daniel C. M., Patel, Nimesh, Pen, Ue-Li, Pesce, Dominic W., Piétu, Vincent, Plambeck, Richard, PopStefanija, Aleksandar, Porth, Oliver, Pötzl, Felix M., Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrios, Pu, Hung-Yi, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ricarte, Angelo, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Ros, Eduardo, Rose, Mel, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruszczyk, Chet, Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Savolainen, Tuomas, Peter Schloerb, F., Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, Des, Sohn, Bong Won, SooHoo, Jason, Sun, He, Tazaki, Fumie, Tetarenko, Alexandra J., Tiede, Paul, Tilanus, Remo P. J., Titus, Michael, Toma, Kenji, Torne, Pablo, Trent, Tyler, Traianou, Efthalia, Trippe, Sascha, van Bemmel, Ilse, van Langevelde, Huib Jan, van Rossum, Daniel R., Wagner, Jan, Ward-Thompson, Derek, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wielgus, Maciek, Wong, George N., Wu, Qingwen, Yoon, Doosoo, Young, André, Young, Ken, Younsi, Ziri, Yuan, Feng, Yuan, Ye-Fei, Anton Zensus, J., Zhao, Guang-Yao, Zhao, Shan-Shan, D'Ammando, F., Orienti, M., Abdalla, H., Adam, R., Aharonian, F., Ait Benkhali, F., Angüner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Barbosa Martins, V., Barnacka, A., Barnard, M., Becherini, Y., Berge, D., Bernlöhr, K., Bi, B., Böttcher, M., Boisson, C., Bolmont, J., de Bony de Lavergne, M., Breuhaus, M., Brun, F., Brun, P., Bryan, M., Büchele, M., Bulik, T., Bylund, T., Caroff, S., Carosi, A., Casanova, S., Chand, T., Chen, A., Cotter, G., Curyło, M., Damascene Mbarubucyeye, J., Davids, I. D., Davies, J., Deil, C., Devin, J., deWilt, P., Dirson, L., Djannati-Ataï, A., Dmytriiev, A., Donath, A., Doroshenko, V., Duffy, C., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J.-P., Feijen, K., Fegan, S., Fiasson, A., Fichet de Clairfontaine, G., Fontaine, G., Funk, S., Füßling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M.-H., Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., Hörbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V., Jung-Richardt, I., Kasai, E., Kastendieck, M. A., Katarzyński, K., Katz, U., Khangulyan, D., Khélifi, B., Klepser, S., Kluźniak, W., Komin, Nu., Konno, R., Kosack, K., Kostunin, D., Kreter, M., Lamanna, G., Lemière, A., Lemoine-Goumard, M., Lenain, J.-P., Levy, C., Lohse, T., Lypova, I., Mackey, J., Majumdar, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Mares, A., Martí-Devesa, G., Marx, R., Maurin, G., Meintjes, P. J., Meyer, M., Moderski, R., Mohamed, M., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., de Naurois, M., Ndiyavala, H., Niederwanger, F., Niemiec, J., Oakes, L., O'Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., de Ona Wilhelmi, E., Ostrowski, M., Panter, M., Panny, S., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Priyana Noel, A., Prokhorov, D. A., Prokoph, H., Pühlhofer, G., Punch, M., Quirrenbach, A., Rauth, R., Reichherzer, P., Reimer, A., Reimer, O., Remy, Q., Renaud, M., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V., Sailer, S., Sanchez, D. A., Santangelo, A., Sasaki, M., Scalici, M., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, M., Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., Spir-Jacob, M., Sun, L., Steenkamp, R., Stegmann, C., Steinmassl, S., Steppa, C., Takahashi, T., Tavernier, T., Taylor, A. M., Terrier, R., Tiziani, D., Tluczykont, M., Tomankova, L., Trichard, C., Tsirou, M., Tuffs, R., Uchiyama, Y., van der Walt, D. J., van Eldik, C., van Rensburg, C., van Soelen, B., Vasileiadis, G., Veh, J., Venter, C., Vincent, P., Vink, J., Völk, H. J., Vuillaume, T., Wadiasingh, Z., Wagner, S. J., Watson, J., Werner, F., White, R., Wierzcholska, A., Wong, Yu Wun, Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., Żywucka, N., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Baack, D., Babić, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Amico, G., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espiñeira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., García López, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jiménez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Perennes, C., Persic, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Zarić, D., Adams, C. B., Benbow, W., Brill, A., Capasso, M., Christiansen, J. L., Chromey, A. J., Daniel, M. K., Errando, M., A Farrell, K., Feng, Q., Finley, J. P., Fortson, L., Furniss, A., Gent, A., Giuri, C., Hassan, T., Hervet, O., Holder, J., Hughes, G., Humensky, T. B., Jin, W., Kaaret, P., Kertzman, M., Kieda, D., Kumar, S., Lang, M. J., Lundy, M., Maier, G., Moriarty, P., Mukherjee, R., Nieto, D., Nievas-Rosillo, M., O'Brien, S., Ong, R. A., Otte, A. N., Patel, S., Pfrang, K., Pohl, M., Prado, R. R., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Ribeiro, D., Richards, G. T., Roache, E., Rulten, C., Ryan, J. L., Santander, M., Sembroski, G. H., Shang, R., Weinstein, A., Williams, D. A., J Williamson, T., The Event Horizon Telescope Collaboration, EAVN Collaboration, and The Fermi Large Area Telescope Collaboration
Subjects: 7. Clean energy
Abstract: The astrophysical journal 911(1), L11 (1-43) (2021). doi:10.3847/2041-8213/abef71, In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 10$^9 M_⊙$. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87’s spectrum. We can exclude that the simultaneous $γ$-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the $γ$-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded., Published by Univ., Chicago, Ill. [u.a.]

238. Key Science Goals for the Next-Generation Event Horizon Telescope

Author: Michael D. Johnson, Kazunori Akiyama, Lindy Blackburn, Katherine L. Bouman, Avery E. Broderick, Vitor Cardoso, Rob P. Fender, Christian M. Fromm, Peter Galison, José L. Gómez, Daryl Haggard, Matthew L. Lister, Andrei P. Lobanov, Sera Markoff, Ramesh Narayan, Priyamvada Natarajan, Tiffany Nichols, Dominic W. Pesce, Ziri Younsi, Andrew Chael, Koushik Chatterjee, Ryan Chaves, Juliusz Doboszewski, Richard Dodson, Sheperd S. Doeleman, Jamee Elder, Garret Fitzpatrick, Kari Haworth, Janice Houston, Sara Issaoun, Yuri Y. Kovalev, Aviad Levis, Rocco Lico, Alexandru Marcoci, Niels C. M. Martens, Neil M. Nagar, Aaron Oppenheimer, Daniel C. M. Palumbo, Angelo Ricarte, María J. Rioja, Freek Roelofs, Ann C. Thresher, Paul Tiede, Jonathan Weintroub, Maciek Wielgus, Sub History and Philosophy of Science, History of Science, Johnson, Michael D [0000-0002-4120-3029], Akiyama, Kazunori [0000-0002-9475-4254], Blackburn, Lindy [0000-0002-9030-642X], Bouman, Katherine L [0000-0003-0077-4367], Broderick, Avery E [0000-0002-3351-760X], Cardoso, Vitor [0000-0003-0553-0433], Fender, Rob P [0000-0002-5654-2744], Fromm, Christian M [0000-0002-1827-1656], Galison, Peter [0000-0002-6429-3872], Gómez, José L [0000-0003-4190-7613], Haggard, Daryl [0000-0001-6803-2138], Lister, Matthew L [0000-0003-1315-3412], Lobanov, Andrei P [0000-0003-1622-1484], Markoff, Sera [0000-0001-9564-0876], Narayan, Ramesh [0000-0002-1919-2730], Natarajan, Priyamvada [0000-0002-5554-8896], Nichols, Tiffany [0000-0003-3664-963X], Pesce, Dominic W [0000-0002-5278-9221], Younsi, Ziri [0000-0001-9283-1191], Chael, Andrew [0000-0003-2966-6220], Chatterjee, Koushik [0000-0002-2825-3590], Doboszewski, Juliusz [0000-0001-7864-2458], Dodson, Richard [0000-0003-0392-3604], Doeleman, Sheperd S [0000-0002-9031-0904], Elder, Jamee [0000-0002-1482-5682], Issaoun, Sara [0000-0002-5297-921X], Kovalev, Yuri Y [0000-0001-9303-3263], Levis, Aviad [0000-0001-7307-632X], Lico, Rocco [0000-0001-7361-2460], Marcoci, Alexandru [0000-0002-5780-0805], Martens, Niels CM [0000-0002-2839-1387], Nagar, Neil M [0000-0001-6920-662X], Palumbo, Daniel CM [0000-0002-7179-3816], Ricarte, Angelo [0000-0001-5287-0452], Rioja, María J [0000-0003-4871-9535], Roelofs, Freek [0000-0001-5461-3687], Thresher, Ann C [0000-0002-1976-6407], Tiede, Paul [0000-0003-3826-5648], Weintroub, Jonathan [0000-0002-4603-5204], Wielgus, Maciek [0000-0002-8635-4242], and Apollo - University of Cambridge Repository
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), ngEHT, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, interferometry, EHT, black holes, Astrophysics - Astrophysics of Galaxies, accretion, 5101 Astronomical Sciences, very-long-baseline interferometry, Astrophysics of Galaxies (astro-ph.GA), general relativity, relativistic jets, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, 51 Physical Sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract: The Event Horizon Telescope (EHT) has led to the first images of a supermassive black hole, revealing the central compact objects in the elliptical galaxy M87 and the Milky Way. Proposed upgrades to this array through the next-generation EHT (ngEHT) program would sharply improve the angular resolution, dynamic range, and temporal coverage of the existing EHT observations. These improvements will uniquely enable a wealth of transformative new discoveries related to black hole science, extending from event-horizon-scale studies of strong gravity to studies of explosive transients to the cosmological growth and influence of supermassive black holes. Here, we present the key science goals for the ngEHT and their associated instrument requirements, both of which have been formulated through a multi-year international effort involving hundreds of scientists worldwide., 32 pages, 11 figures, accepted for publication in a special issue of Galaxies on the ngEHT (https://www.mdpi.com/journal/galaxies/special_issues/ngEHT_blackholes)
Published: 2023

239. Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope

Author: Sara Issaoun, Maciek Wielgus, Svetlana Jorstad, Thomas P. Krichbaum, Lindy Blackburn, Michael Janssen, Chi-kwan Chan, Dominic W. Pesce, José L. Gómez, Kazunori Akiyama, Monika Mościbrodzka, Iván Martí-Vidal, Andrew Chael, Rocco Lico, Jun Liu, Venkatessh Ramakrishnan, Mikhail Lisakov, Antonio Fuentes, Guang-Yao Zhao, Kotaro Moriyama, Avery E. Broderick, Paul Tiede, Nicholas R. MacDonald, Yosuke Mizuno, Efthalia Traianou, Laurent Loinard, Jordy Davelaar, Mark Gurwell, Ru-Sen Lu, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Raymond Blundell, Wilfred Boland, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do-Young Byun, John E. Carlstrom, Chiara Ceccobello, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Sheperd S. Doeleman, Vedant Dhruv, Sergio Abraham Dzib Quijano, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, Minfeng Gu, Kazuhiro Hada, Daryl Haggard, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, David J. James, Buell T. Jannuzi, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Michael D. Johnson, Abhishek V. Joshi, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Michael Kramer, Cheng-Yu Kuo, Noemi La Bella, Tod R. Lauer, Daeyoung Lee, Sang-Sung Lee, Po Kin Leung, Aviad Levis, Zhiyuan Li, Greg Lindahl, Michael Lindqvist, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Colin Lonsdale, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Daniel Michalik, Izumi Mizuno, James M. Moran, Cornelia Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Andrew Nadolski, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Cristina Romero-Canizales, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Arguelles, Miguel Sanchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Kamal Souccar, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Remo P. J. Tilanus, Michael Titus, Pablo Torne, Tyler Trent, Sascha Trippe, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Kaj Wiik, Gunther Witzel, Michael Wondrak, George N. Wong, Qingwen Wu, Paul Yamaguchi, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, Shan-Shan Zhao, NASA Hubble Fellowship Program, Max Planck Institute of Neurobiology, University of Massachusetts Boston, Harvard University, Northern Arizona University, Instituto de Astrofísica de Andalucía, National Astronomical Observatory of Japan, Radboud University, Institute for Molecules and Materials, Technical University of Valencia, University of Princeton, Istituto Nazionale Astrofisica, Metsähovi Radio Observatory, Goethe University Frankfurt, University of Waterloo, Shanghai Jiao Tong University (上海交通大学), Universidad Nacional Autonoma de Mexico, Instituto de Neurobiologia, Flatiron Institute, Harvard-Smithsonian Center for Astrophysics, Chinese Academy of Medical Sciences, University of Malaya, University of Texas at San Antonio, Academia Sinica, Yale University, MIT CSAIL, Massachusetts Institute of Technology (MIT), University of Illinois at Urbana-Champaign, Loyola University Chicago, James Clerk Maxwell Telescope, Nederlandse Onderzoekschool voor Astronomie (NOVA), Jet Propulsion Laboratory, University of Hawaii at Manoa, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, High Energy Astrophys. & Astropart. Phys (API, FNWI), Gravitation and Astroparticle Physics Amsterdam, Ministerio de Ciencia e Innovación (España), European Commission, Science and Technology Facilities Council (UK), Issaoun, Sara, Wielgus, Maciek, Jorstad, Svetlana, Krichbaum, Thomas P., Blackburn, Lindy, Janssen, Michael, Chan, Chi-kwan, Pesce, Dominic W., Gómez, José L., Akiyama, Kazunori, Mościbrodzka, Monika, Martí-Vidal, Iván, Chael, Andrew, Lico, Rocco, Liu, Jun, Ramakrishnan, Venkatessh, Lisakov, Mikhail, Fuentes, Antonio, Zhao, Guang-Yao, Moriyama, Kotaro, Broderick, Avery E., Tiede, Paul, Macdonald, Nicholas R., Mizuno, Yosuke, Traianou, Efthalia, Loinard, Laurent, Davelaar, Jordy, Gurwell, Mark, Ru-Sen, Lu, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlo, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Bach, Uwe, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Bauböck, Michi, Benson, Bradford A., Bintley, Dan, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broguiere, Dominique, Bronzwaer, Thoma, Bustamante, Sandra, Byun, Do-Young, Carlstrom, John E., Ceccobello, Chiara, Chatterjee, Koushik, Chatterjee, Shami, Chen, Ming-Tang, Chen, Yongjun, Cho, Ilje, Christian, Pierre, Conroy, Nicholas S., Conway, John E., Cordes, James M., Crawford, Thomas M., Crew, Geoffrey B., Cruz-Osorio, Alejandro, Cui, Yuzhu, Laurentis, Mariafelicia De, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Dexter, Jason, Doeleman, Sheperd S., Dhruv, Vedant, Dzib Quijano, Sergio Abraham, Eatough, Ralph P., Emami, Razieh, Falcke, Heino, Farah, Joseph, Fish, Vincent L., Fomalont, Ed, Ford, H. Alyson, Fraga-Encinas, Raquel, Freeman, William T., Friberg, Per, Fromm, Christian M., Galison, Peter, Gammie, Charles F., García, Roberto, Gentaz, Olivier, Georgiev, Bori, Goddi, Ciriaco, Gold, Roman, Gómez-Ruiz, Arturo I., Minfeng, Gu, Hada, Kazuhiro, Haggard, Daryl, Hecht, Michael H., Hesper, Ronald, Luis C., Ho, Paul, Ho, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Ikeda, Shiro, Impellizzeri, C. M. Violette, Inoue, Makoto, James, David J., Jannuzi, Buell T., Jeter, Britton, Jiang, Wu, Jimenez-Rosales, Alejandra, Johnson, Michael D., Joshi, Abhishek V., Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kawashima, Tomohisa, Keating, Garrett K., Kettenis, Mark, Kim, Dong-Jin, Kim, Jae-Young, Kim, Jongsoo, Kim, Junhan, Kino, Motoki, Koay, Jun Yi, Kocherlakota, Prashant, Kofuji, Yutaro, Koch, Patrick M., Koyama, Shoko, Kramer, Carsten, Kramer, Michael, Kuo, Cheng-Yu, Bella, Noemi La, Lauer, Tod R., Lee, Daeyoung, Lee, Sang-Sung, Leung, Po Kin, Levis, Aviad, Zhiyuan, Li, Lindahl, Greg, Lindqvist, Michael, Liu, Kuo, Liuzzo, Elisabetta, Wen-Ping, Lo, Lobanov, Andrei P., Lonsdale, Colin, Mao, Jirong, Marchili, Nicola, Markoff, Sera, Marrone, Daniel P., Marscher, Alan P., Matsushita, Satoki, Matthews, Lynn D., Medeiros, Lia, Menten, Karl M., Michalik, Daniel, Mizuno, Izumi, Moran, James M., Müller, Cornelia, Mus, Alejandro, Musoke, Gibwa, Myserlis, Ioanni, Nadolski, Andrew, Nagai, Hiroshi, Nagar, Neil M., Nakamura, Masanori, Narayan, Ramesh, Narayanan, Gopal, Natarajan, Iniyan, Nathanail, Antonio, Neilsen, Joey, Neri, Roberto, Chunchong, Ni, Noutsos, Aristeidi, Nowak, Michael A., Junghwan, Oh, Okino, Hiroki, Olivares, Héctor, Ortiz-León, Gisela N., Oyama, Tomoaki, Özel, Feryal, Palumbo, Daniel C. M., Paraschos, Georgios Filippo, Park, Jongho, Parsons, Harriet, Patel, Nimesh, Pen, Ue-Li, Piétu, Vincent, Plambeck, Richard, Popstefanija, Aleksandar, Porth, Oliver, Pötzl, Felix M., Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrio, Hung-Yi, Pu, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ricarte, Angelo, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Ros, Eduardo, Romero-Canizales, Cristina, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruiz, Ignacio, Ruszczyk, Chet, Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Sanchez-Portal, Miguel, Sasada, Mahito, Satapathy, Kaushik, Savolainen, Tuoma, Schloerb, F. Peter, Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, De, Sohn, Bong Won, Soohoo, Jason, Souccar, Kamal, Sun, He, Tazaki, Fumie, Tetarenko, Alexandra J., Tilanus, Remo P. J., Titus, Michael, Torne, Pablo, Trent, Tyler, Trippe, Sascha, van Bemmel, Ilse, van Langevelde, Huib Jan, van Rossum, Daniel R., Vos, Jesse, Wagner, Jan, Ward-Thompson, Derek, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wiik, Kaj, Witzel, Gunther, Wondrak, Michael, Wong, George N., Qingwen, Wu, Yamaguchi, Paul, Yoon, Doosoo, Young, André, Young, Ken, Younsi, Ziri, Yuan, Feng, Yuan, Ye-Fei, Zensus, J. Anton, Zhang, Shuo, Zhao, Shan-Shan, and Astronomy
Subjects: POLARIZATION, Astronomy, F521, M87, FOS: Physical sciences, AGN JETS, Jets, BLACK-HOLES, Very long baseline interferometry, High Energy Astrophysical Phenomena (astro-ph.HE), MAGNETIC-FIELD STRUCTURE, Active galactic nuclei, SAGITTARIUS A-ASTERISK, SHADOW, Astronomy and Astrophysics, RESULTS. I, Space and Planetary Science, Active galaxies, Radio interferometry, RELATIVISTIC JETS, Astrophysics - High Energy Astrophysical Phenomena, VLBI, High energy astrophysics, Mathematics, Blazars
Abstract: Full list of authors: Issaoun, Sara; Wielgus, Maciek; Jorstad, Svetlana; Krichbaum, Thomas P.; Blackburn, Lindy; Janssen, Michael; Chan, Chi-kwan; Pesce, Dominic W.; Gomez, Jose L.; Akiyama, Kazunori; Moscibrodzka, Monika; Marti-Vidal, Ivan; Chael, Andrew; Lico, Rocco; Liu, Jun; Ramakrishnan, Venkatessh; Lisakov, Mikhail; Fuentes, Antonio; Zhao, Guang-Yao; Moriyama, Kotaro; Broderick, Avery E.; Tiede, Paul; MacDonald, Nicholas R.; Mizuno, Yosuke; Traianou, Efthalia; Loinard, Laurent; Davelaar, Jordy; Gurwell, Mark; Lu, Ru-Sen; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislac; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen, Yongjun; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Doeleman, Sheperd S.; Dhruv, Vedant; Quijano, Sergio Abraham Dzib; Eatough, Ralph P.; Emami, Razieh; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Galison, Peter; Gammie, Charles F.; Garcia, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gold, Roman; Gomez-Ruiz, Arturo, I; Gu, Minfeng; Hada, Kazuhiro; Haggard, Daryl; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Impellizzeri, C. M. Violette; Inoue, Makoto; James, David J.; Jannuzi, Buell T.; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Joshi, Abhishek, V; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kocherlakota, Prashant; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Carsten; Kramer, Michael; Kuo, Cheng-Yu; La Bella, Noemi; Lauer, Tod R.; Lee, Daeyoung; Lee, Sang-Sung; Leung, Po Kin; Levis, Aviad; Li, Zhiyuan; Lindahl, Greg; Lindqvist, Michael; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Lonsdale, Colin; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Michalik, Daniel; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Mueller, Cornelia; Mus, Alejandro; Musoke, Gibwa; Myserlis, Ioannis; Nadolski, Andrew; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Oh, Junghwan; Okino, Hiroki; Olivares, Hector; Ortiz-Leon, Gisela N.; Oyama, Tomoaki; Ozel, Feryal; Palumbo, Daniel C. M.; Paraschos, Georgios Filippos; Park, Jongho; Parsons, Harriet; Patel, Nimesh; Pen, Ue-Li; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Potzl, Felix M.; Prather, Ben; Preciado-Lopez, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Romero-Canizales, Cristina; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruiz, Ignacio; Ruszczyk, Chet; Rygl, Kazi L. J.; Sanchez, Salvador; Sanchez-Arguelles, David; Sanchez-Portal, Miguel; Sasada, Mahito; Satapathy, Kaushik; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Souccar, Kamal; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tilanus, Remo P. J.; Titus, Michael; Torne, Pablo; Trent, Tyler; Trippe, Sascha; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Vos, Jesse; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wiik, Kaj; Witzel, Gunther; Wondrak, Michael; Wong, George N.; Wu, Qingwen; Yamaguchi, Paul; Yoon, Doosoo; Young, Andre; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhang, Shuo; Zhao, Shan-Shan.-- This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited., The blazar J1924–2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic center's black hole Sagittarius A*. Here we present the first total and linearly polarized intensity images of this source obtained with the unprecedented 20 μas resolution of the EHT. J1924–2914 is a very compact flat-spectrum radio source with strong optical variability and polarization. In April 2017 the source was observed quasi-simultaneously with the EHT (April 5–11), the Global Millimeter VLBI Array (April 3), and the Very Long Baseline Array (April 28), giving a novel view of the source at four observing frequencies, 230, 86, 8.7, and 2.3 GHz. These observations probe jet properties from the subparsec to 100 pc scales. We combine the multifrequency images of J1924–2914 to study the source morphology. We find that the jet exhibits a characteristic bending, with a gradual clockwise rotation of the jet projected position angle of about 90° between 2.3 and 230 GHz. Linearly polarized intensity images of J1924–2914 with the extremely fine resolution of the EHT provide evidence for ordered toroidal magnetic fields in the blazar compact core. © 2022. The Author(s). Published by the American Astronomical Society., The Event Horizon Telescope Collaboration thanks the following organizations and programs: the Academy of Finland (projects 274477, 284495, 312496, 315721); the Agencia Nacional de Investigación y Desarrollo (ANID), Chile via NCN19_058 (TITANs) and Fondecyt 3190878, the Alexander von Humboldt Stiftung; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the black hole Initiative at Harvard University, through a grant (60477) from the John Templeton Foundation; the China Scholarship Council; Consejo Nacional de Ciencia y Tecnología (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037-279006, F0003-281692, 104497, 275201, 263356); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Dirección General de Asuntos del Personal Académico-Universidad Nacional Autónoma de México (DGAPA-UNAM, projects IN112417 and IN112820); the European Research Council Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the Gordon and Betty Moore Foundation (grant GBMF-3561); the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829); the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSW-SLH057, QYZDJSSW- SYS008, ZDBS-LY-SLH011); the Leverhulme Trust Early Career Research Fellowship; the Max-Planck-Gesellschaft (MPG); the Max Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP18K13594, JP18K03656, JP18H03721, 18K03709, 18H01245, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (105-2112-M-001-025-MY3, 106-2112-M-001-011, 106-2119- M-001-027, 107-2119-M-001-017, 107-2119-M-001-020, 107-2119-M-110-005, 108-2112-M-001-048, and 109-2124-M-001-005); the National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, NASA NuSTAR award 80NSSC20K0645); the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST-0521233, AST-0705062, AST-0905844, AST-0922984, AST-1126433, AST-1140030, DGE-1144085, AST-1207704, AST-1207730, AST-1207752, MRI-1228509, OPP-1248097, AST-1310896, AST-1555365,AST-1615796, AST-1715061, AST-1716327, AST-1903847,AST-2034306); the Natural Science Foundation of China (grants 11573051, 11633006, 11650110427, 10625314, 11721303, 11725312, 11933007, 11991052, 11991053); a fellowship of China Postdoctoral Science Foundation (2020M671266); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Youth Thousand Talents Program of China; the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants NRF-2015H1A2A1033752, 2015- R1D1A1A01056807, the Korea Research Fellowship Program: NRF-2015H1D3A1066561, Basic Research Support Grant 2019R1F1A1059721); the Netherlands Organization for Scientific Research (NWO) VICI award (grant 639.043.513) and Spinoza Prize SPI 78-409; the New Scientific Frontiers with Precision Radio Interferometry Fellowship awarded by the South African Radio Astronomy Observatory (SARAO), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Technology (DST) of South Africa; the Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 2017-00648) the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Economía y Competitividad (grants PGC2018-098915-B-C21, AYA2016-80889-P, PID2019-108995GB-C21); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofísica de Andalucía (SEV-2017-0709); the Toray Science Foundation; the Consejería de Economía, Conocimiento, Empresas y Universidad of the Junta de Andalucía (grant P18-FR-1769), the Consejo Superior de Investigaciones Científicas (grant 2019AEP112); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000001); the European Union's Horizon 2020 research and innovation program under grant agreement No 730562 RadioNet; ALMA North America Development Fund; the Academia Sinica; Chandra DD7-18089X and TM6-17006X; the GenT Program (Generalitat Valenciana) Project CIDEGENT/2018/021. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI-1743442. XSEDE Stampede2 resource at TACC was allocated through TG-AST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. The simulations were performed in part on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, and on the HazelHen cluster at the HLRS in Stuttgart. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).
Published: 2022

240. First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

Author: null Event Horizon Telescope Collaboration, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do-Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Chi-kwan Chan, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Vedant Dhruv, Sheperd S. Doeleman, Sean Dougal, Sergio A. Dzib, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, José L. Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Kari Haworth, Michael H. Hecht, Ronald Hesper, Dirk Heumann, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jiménez-Rosales, Michael D. Johnson, Svetlana Jorstad, Abhishek V. Joshi, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Michael Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Noemi La Bella, Tod R. Lauer, Daeyoung Lee, Sang-Sung Lee, Po Kin Leung, Aviad Levis, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Ru-Sen Lu, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Daniel Michalik, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Cornelia Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Andrew Nadolski, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Cristina Romero-Cañizales, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Kamal Souccar, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Pablo Torne, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Maciek Wielgus, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, George N. Wong, Qingwen Wu, Paul Yamaguchi, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, Shan-Shan Zhao, Claudio Agurto, Alexander Allardi, Rodrigo Amestica, Juan Pablo Araneda, Oriel Arriagada, Jennie L. Berghuis, Alessandra Bertarini, Ryan Berthold, Jay Blanchard, Ken Brown, Mauricio Cárdenas, Michael Cantzler, Patricio Caro, Edgar Castillo-Domínguez, Tin Lok Chan, Chih-Cheng Chang, Dominic O. Chang, Shu-Hao Chang, Song-Chu Chang, Chung-Chen Chen, Ryan Chilson, Tim C. Chuter, Miroslaw Ciechanowicz, Edgar Colin-Beltran, Iain M. Coulson, Joseph Crowley, Nathalie Degenaar, Sven Dornbusch, Carlos A. Durán, Wendeline B. Everett, Aaron Faber, Karl Forster, Miriam M. Fuchs, David M. Gale, Gertie Geertsema, Edouard González, Dave Graham, Frédéric Gueth, Nils W. Halverson, Chih-Chiang Han, Kuo-Chang Han, Yutaka Hasegawa, José Luis Hernández-Rebollar, Cristian Herrera, Ruben Herrero-Illana, Stefan Heyminck, Akihiko Hirota, James Hoge, Shelbi R. Hostler Schimpf, Ryan E. Howie, Yau-De Huang, Homin Jiang, Hao Jinchi, David John, Kimihiro Kimura, Thomas Klein, Derek Kubo, John Kuroda, Caleb Kwon, Richard Lacasse, Robert Laing, Erik M. Leitch, Chao-Te Li, Ching-Tang Liu, Kuan-Yu Liu, Lupin C.-C. Lin, Li-Ming Lu, Felipe Mac-Auliffe, Pierre Martin-Cocher, Callie Matulonis, John K. Maute, Hugo Messias, Zheng Meyer-Zhao, Alfredo Montaña, Francisco Montenegro-Montes, William Montgomerie, Marcos Emir Moreno Nolasco, Dirk Muders, Hiroaki Nishioka, Timothy J. Norton, George Nystrom, Hideo Ogawa, Rodrigo Olivares, Peter Oshiro, Juan Pablo Pérez-Beaupuits, Rodrigo Parra, Neil M. Phillips, Michael Poirier, Nicolas Pradel, Richard Qiu, Philippe A. Raffin, Alexandra S. Rahlin, Jorge Ramírez, Sean Ressler, Mark Reynolds, Iván Rodríguez-Montoya, Alejandro F. Saez-Madain, Jorge Santana, Paul Shaw, Leslie E. Shirkey, Kevin M. Silva, William Snow, Don Sousa, T. K. Sridharan, William Stahm, Anthony A. Stark, John Test, Karl Torstensson, Paulina Venegas, Craig Walther, Ta-Shun Wei, Chris White, Gundolf Wieching, Rudy Wijnands, Jan G. A. Wouterloot, Chen-Yu Yu, Wei Yu (于威), Milagros Zeballos, High Energy Astrophys. & Astropart. Phys (API, FNWI), Akiyama, K., Alberdi, A., Alef, W., Algaba, J. 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[0000-0001-6920-662X], Nakamura, Masanori [0000-0001-6081-2420], Narayan, Ramesh [0000-0002-1919-2730], Narayanan, Gopal [0000-0002-4723-6569], Natarajan, Iniyan [0000-0001-8242-4373], Neilsen, Joey [0000-0002-8247-786X], Neri, Roberto [0000-0002-7176-4046], Ni, Chunchong [0000-0003-1361-5699], Noutsos, Aristeidis [0000-0002-4151-3860], Nowak, Michael A. [0000-0001-6923-1315], Oh, Junghwan [0000-0002-4991-9638], Okino, Hiroki [0000-0003-3779-2016], Olivares, Héctor [0000-0001-6833-7580], Ortiz-León, Gisela N. [0000-0002-2863-676X], Oyama, Tomoaki [0000-0003-4046-2923], Özel, Feryal [0000-0003-4413-1523], Palumbo, Daniel C. M. [0000-0002-7179-3816], Paraschos, Georgios Filippos [0000-0001-6757-3098], Park, Jongho [0000-0001-6558-9053], Parsons, Harriet [0000-0002-6327-3423], Patel, Nimesh [0000-0002-6021-9421], Pen, Ue-Li [0000-0003-2155-9578], Pesce, Dominic W. [0000-0002-5278-9221], Plambeck, Richard [0000-0001-6765-9609], Porth, Oliver [0000-0002-4584-2557], Pötzl, Felix M. 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[0000-0003-4146-9043], Sánchez, Salvador [0000-0002-8042-5951], Sánchez-Argüelles, David [0000-0002-7344-9920], Sánchez-Portal, Miguel [0000-0003-0981-9664], Sasada, Mahito [0000-0001-5946-9960], Satapathy, Kaushik [0000-0003-0433-3585], Savolainen, Tuomas [0000-0001-6214-1085], Schonfeld, Jonathan [0000-0002-8909-2401], Schuster, Karl-Friedrich [0000-0003-2890-9454], Shao, Lijing [0000-0002-1334-8853], Shen, Zhiqiang [0000-0003-3540-8746], Small, Des [0000-0003-3723-5404], Sohn, Bong Won [0000-0002-4148-8378], SooHoo, Jason [0000-0003-1938-0720], Souccar, Kamal [0000-0001-7915-5272], Sun, He [0000-0003-1526-6787], Tazaki, Fumie [0000-0003-0236-0600], Tetarenko, Alexandra J. [0000-0003-3906-4354], Tiede, Paul [0000-0003-3826-5648], Tilanus, Remo P. J. [0000-0002-6514-553X], Titus, Michael [0000-0001-9001-3275], Torne, Pablo [0000-0001-8700-6058], Traianou, Efthalia [0000-0002-1209-6500], Trippe, Sascha [0000-0003-0465-1559], Turk, Matthew [0000-0002-5294-0198], van Bemmel, Ilse [0000-0001-5473-2950], van Langevelde, Huib Jan [0000-0002-0230-5946], van Rossum, Daniel R. [0000-0001-7772-6131], Vos, Jesse [0000-0003-3349-7394], Wagner, Jan [0000-0003-1105-6109], Ward-Thompson, Derek [0000-0003-1140-2761], Wardle, John [0000-0002-8960-2942], Weintroub, Jonathan [0000-0002-4603-5204], Wex, Norbert [0000-0003-4058-2837], Wharton, Robert [0000-0002-7416-5209], Wielgus, Maciek [0000-0002-8635-4242], Wiik, Kaj [0000-0002-0862-3398], Witzel, Gunther [0000-0003-2618-797X], Wondrak, Michael F. [0000-0002-6894-1072], Wong, George N. [0000-0001-6952-2147], Wu, Qingwen [0000-0003-4773-4987], Yamaguchi, Paul [0000-0002-6017-8199], Yoon, Doosoo [0000-0001-8694-8166], Young, André [0000-0003-0000-2682], Young, Ken [0000-0002-3666-4920], Younsi, Ziri [0000-0001-9283-1191], Yuan, Feng [0000-0003-3564-6437], Yuan, Ye-Fei [0000-0002-7330-4756], Zensus, J. Anton [0000-0001-7470-3321], Zhang, Shuo [0000-0002-2967-790X], Zhao, Guang-Yao [0000-0002-4417-1659], Zhao, Shan-Shan [0000-0002-9774-3606], Berghuis, Jennie L. [0000-0003-2287-158X], Blanchard, Jay [0000-0002-2756-395X], Chan, Tin Lok [0000-0001-9197-932X], Coulson, Iain M. [0000-0002-7316-4626], Degenaar, Nathalie [0000-0002-0092-3548], Durán, Carlos A. [0000-0001-7622-3890], Everett, Wendeline B. [0000-0002-5370-6651], Forster, Karl [0000-0001-5800-5531], Halverson, Nils W. [0000-0003-2606-9340], Herrero-Illana, Ruben [0000-0002-7758-8717], Hirota, Akihiko [0000-0002-0465-5421], Howie, Ryan E. [0000-0002-5451-3624], Kwon, Caleb [0000-0001-9006-7345], Laing, Robert [0000-0001-6786-3087], Leitch, Erik M. [0000-0001-8553-9336], Lin, Lupin C.-C. [0000-0003-4083-9567], Maute, John K. [0000-0002-5744-4249], Messias, Hugo [0000-0002-2985-7994], Montenegro-Montes, Francisco [0000-0002-7430-3771], Muders, Dirk [0000-0002-2315-2571], Pérez-Beaupuits, Juan Pablo [0000-0003-3536-2274], Poirier, Michael [0000-0001-6641-0959], Qiu, Richard [0000-0003-3462-0817], Rahlin, Alexandra S. [0000-0003-3953-1776], Ressler, Sean [0000-0003-0220-5723], Reynolds, Mark [0000-0003-1621-9392], Saez-Madain, Alejandro F. [0000-0002-0804-3414], Sousa, Don [0000-0002-2625-2607], Stark, Anthony A. [0000-0002-2718-9996], White, Chris [0000-0001-7448-4253], Wijnands, Rudy [0000-0002-3516-2152], Wouterloot, Jan G. A. [0000-0002-4694-6905], Yu (于威), Wei [0000-0002-5168-6052], Apollo - University of Cambridge Repository, Ministerio de Ciencia e Innovación (España), European Commission, European Research Council, Science and Technology Facilities Council (UK), Astronomy, Metsähovi Radio Observatory, Department of Electronics and Nanoengineering, Science Support Office, Aalto-yliopisto, and Aalto University
Subjects: Black holes, F520, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, F521, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 5109 Space Sciences, Heterodyne interferometry, Galactic center, General Relativity and Quantum Cosmology, Space and Planetary Science, 5101 Astronomical Sciences, Kerr black holes, Rotating black holes, 51 Physical Sciences, Astrophysics::Galaxy Astrophysics, Mathematics
Abstract: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Full list of authors: Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen, Yongjun; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Dhruv, Vedant; Doeleman, Sheperd S.; Dougal, Sean; Dzib, Sergio A.; Eatough, Ralph P.; Emami, Razieh; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; Garcia, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gold, Roman; Gomez-Ruiz, Arturo, I; Gomez, Jose L.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Haworth, Kari; Hecht, Michael H.; Hesper, Ronald; Heumann, Dirk; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Impellizzeri, C. M. Violette; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Joshi, Abhishek, V; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kocherlakota, Prashant; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Carsten; Kramer, Michael; Krichbaum, Thomas P.; Kuo, Cheng-Yu; La Bella, Noemi; Lauer, Tod R.; Lee, Daeyoung; Lee, Sang-Sung; Leung, Po Kin; Levis, Aviad; Li, Zhiyuan; Lico, Rocco; Lindahl, Greg; Lindqvist, Michael; Lisakov, Mikhail; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin J.; Lu, Ru-Sen; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Marti-Vidal, Ivan; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Michalik, Daniel; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Muller, Cornelia; Mus, Alejandro; Musoke, Gibwa; Myserlis, Ioannis; Nadolski, Andrew; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Fuentes, Santiago Navarro; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Oh, Junghwan; Okino, Hiroki; Olivares, Hector; Ortiz-Leon, Gisela N.; Oyama, Tomoaki; Palumbo, Daniel C. M.; Paraschos, Georgios Filippos; Park, Jongho; Parsons, Harriet; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Potzl, Felix M.; Prather, Ben; Preciado-Lopez, Jorge A.; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Romero-Canizales, Cristina; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruiz, Ignacio; Ruszczyk, Chet; Rygl, Kazi L. J.; Sanchez, Salvador; Sanchez-Arguelles, David; Sanchez-Portal, Miguel; Sasada, Mahito; Satapathy, Kaushik; Savolainen, Tuomas; Schloerb, F. Peter; Schonfeld, Jonathan; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Souccar, Kamal; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Torne, Pablo; Traianou, Efthalia; Trent, Tyler; Trippe, Sascha; Turk, Matthew; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Vos, Jesse; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wiik, Kaj; Witzel, Gunther; Wondrak, Michael F.; Wong, George N.; Wu, Qingwen; Yamaguchi, Paul; Yoon, Doosoo; Young, Andre; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhang, Shuo; Zhao, Guang-Yao; Zhao, Shan-Shan; Ozel, Feryal; Agurto, Claudio; Allardi, Alexander; Amestica, Rodrigo; Araneda, Juan Pablo; Arriagada, Oriel; Berghuis, Jennie L.; Bertarini, Alessandra; Berthold, Ryan; Blanchard, Jay; Brown, Ken; Cardenas, Mauricio; Cantzler, Michael; Caro, Patricio; Castillo-Dominguez, Edgar; Chan, Tin Lok; Chang, Chih-Cheng; Chang, Dominic O.; Chang, Shu-Hao; Chang, Song-Chu; Chen, Chung-Chen; Chilson, Ryan; Chuter, Tim C.; Ciechanowicz, Miroslaw; Colin-Beltran, Edgar; Coulson, Iain M.; Crowley, Joseph; Degenaar, Nathalie; Dornbusch, Sven; Duran, Carlos A.; Everett, Wendeline B.; Faber, Aaron; Forster, Karl; Fuchs, Miriam M.; Gale, David M.; Geertsema, Gertie; Gonzalez, Edouard; Graham, Dave; Gueth, Frederic; Halverson, Nils W.; Han, Chih-Chiang; Han, Kuo-Chang; Hasegawa, Yutaka; Hernandez-Rebollar, Jose Luis; Herrera, Cristian; Herrero-Illana, Ruben; Heyminck, Stefan; Hirota, Akihiko; Hoge, James; Schimpf, Shelbi R. Hostler; Howie, Ryan E.; Huang, Yau-De; Jiang, Homin; Jinchi, Hao; John, David; Kimura, Kimihiro; Klein, Thomas; Kubo, Derek; Kuroda, John; Kwon, Caleb; Lacasse, Richard; Laing, Robert; Leitch, Erik M.; Li, Chao-Te; Liu, Ching-Tang; Liu, Kuan-Yu; Lin, Lupin C-C; Lu, Li-Ming; Mac-Auliffe, Felipe; Martin-Cocher, Pierre; Matulonis, Callie; Maute, John K.; Messias, Hugo; Meyer-Zhao, Zheng; Montana, Alfredo; Montenegro-Montes, Francisco; Montgomerie, William; Nolasco, Marcos Emir Moreno; Muders, Dirk; Nishioka, Hiroaki; Norton, Timothy J.; Nystrom, George; Ogawa, Hideo; Olivares, Rodrigo; Oshiro, Peter; Perez-Beaupuits, Juan Pablo; Parra, Rodrigo; Phillips, Neil M.; Poirier, Michael; Pradel, Nicolas; Qiu, Richard; Raffin, Philippe A.; Rahlin, Alexandra S.; Ramirez, Jorge; Ressler, Sean; Reynolds, Mark; Rodriguez-Montoya, Ivan; Saez-Madain, Alejandro F.; Santana, Jorge; Shaw, Paul; Shirkey, Leslie E., Jr.; Silva, Kevin M.; Snow, William; Sousa, Don; Sridharan, T. K.; Stahm, William; Stark, Anthony A.; Test, John; Torstensson, Karl; Venegas, Paulina; Walther, Craig; Wei, Ta-Shun; White, Chris; Wieching, Gundolf; Wijnands, Rudy; Wouterloot, Jan G. A.; Yu, Chen-Yu; Yu, Wei; Zeballos, Milagros; Event Horizon Telescope Collaboration., We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A*), the Galactic center source associated with a supermassive black hole. These observations were conducted in 2017 using a global interferometric array of eight telescopes operating at a wavelength of λ = 1.3 mm. The EHT data resolve a compact emission region with intrahour variability. A variety of imaging and modeling analyses all support an image that is dominated by a bright, thick ring with a diameter of 51.8 ± 2.3 μas (68% credible interval). The ring has modest azimuthal brightness asymmetry and a comparatively dim interior. Using a large suite of numerical simulations, we demonstrate that the EHT images of Sgr A* are consistent with the expected appearance of a Kerr black hole with mass ∼4 × 106 M⊙, which is inferred to exist at this location based on previous infrared observations of individual stellar orbits, as well as maser proper-motion studies. Our model comparisons disfavor scenarios where the black hole is viewed at high inclination (i > 50°), as well as nonspinning black holes and those with retrograde accretion disks. Our results provide direct evidence for the presence of a supermassive black hole at the center of the Milky Way, and for the first time we connect the predictions from dynamical measurements of stellar orbits on scales of 103–105 gravitational radii to event-horizon-scale images and variability. Furthermore, a comparison with the EHT results for the supermassive black hole M87* shows consistency with the predictions of general relativity spanning over three orders of magnitude in central mass. © 2022. The Author(s). Published by the American Astronomical Society., The Event Horizon Telescope Collaboration thanks the following organizations and programs: the Academia Sinica; the Academy of Finland (projects 274477, 284495, 312496, 315721); the Agencia Nacional de Investigación y Desarrollo (ANID), Chile via NCN19_058 (TITANs) and Fondecyt 1221421, the Alexander von Humboldt Stiftung; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the ALMA North America Development Fund; the Black Hole Initiative, which is funded by grants from the John Templeton Foundation and the Gordon and Betty Moore Foundation (although the opinions expressed in this work are those of the author(s) and do not necessarily reflect the views of these Foundations); Chandra DD7-18089X and TM6-17006X; the China Scholarship Council; China Postdoctoral Science Foundation fellowship (2020M671266); Consejo Nacional de Ciencia y Tecnología (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037-279006, F0003-281692, 104497, 275201, 263356); the Consejería de Economía, Conocimiento, Empresas y Universidad of the Junta de Andalucía (grant P18-FR-1769), the Consejo Superior de Investigaciones Científicas (grant 2019AEP112); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Dirección General de Asuntos del Personal Académico-Universidad Nacional Autónoma de México (DGAPA-UNAM, projects IN112417 and IN112820); the Dutch Organization for Scientific Research (NWO) VICI award (grant 639.043.513) and grant OCENW.KLEIN.113; the Dutch National Supercomputers, Cartesius and Snellius (NWO Grant 2021.013); the EACOA Fellowship awarded by the East Asia Core Observatories Association, which consists of the Academia Sinica Institute of Astronomy and Astrophysics, the National Astronomical Observatory of Japan, Center for Astronomical Mega-Science, Chinese Academy of Sciences, and the Korea Astronomy and Space Science Institute; the European Research Council (ERC) Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the European Union Horizon 2020 research and innovation programme under grant agreements RadioNet (No 730562) and M2FINDERS (No 101018682); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the European Research Council for advanced grant "JETSET: Launching, propagation and emission of relativistic jets from binary mergers and across mass scales" (Grant No. 884631); the Institute for Advanced Study; the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; DFG research grant "Jet physics on horizon scales and beyond" (Grant No. FR 4069/2-1); Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japan Ministry of Education, Culture, Sports, Science and Technology (MEXT; grant JPMXP1020200109); the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829); the Joint Institute for Computational Fundamental Science, Japan; the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSW-SLH057, QYZDJSSW-SYS008, ZDBS-LY-SLH011); the Leverhulme Trust Early Career Research Fellowship; the Max-Planck-Gesellschaft (MPG); the Max Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP21H01137, JP18H03721, JP18K13594, 18K03709, JP19K14761, 18H01245, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (103-2119-M-001-010-MY2, 105-2112-M-001-025-MY3, 105-2119-M-001-042, 106-2112-M-001-011, 106-2119-M-001-013, 106-2119-M-001-027, 106-2923-M-001-005, 107-2119-M-001-017, 107-2119-M-001-020, 107-2119-M-001-041, 107-2119-M-110-005, 107-2923-M-001-009, 108-2112-M-001-048, 108-2112-M-001-051, 108-2923-M-001-002, 109-2112-M-001-025, 109-2124-M-001-005, 109-2923-M-001-001, 110-2112-M-003-007-MY2, 110-2112-M-001-033, 110-2124-M-001-007, and 110-2923-M-001-001); the Ministry of Education (MoE) of Taiwan Yushan Young Scholar Program; the Physics Division, National Center for Theoretical Sciences of Taiwan; the National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, NASA NuSTAR award 80NSSC20K0645); NASA Hubble Fellowship grant HST-HF2-51431.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555; the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2017YFA0402703, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST-0521233, AST-0705062, AST-0905844, AST-0922984, AST-1126433, AST-1140030, DGE-1144085, AST-1207704, AST-1207730, AST-1207752, MRI-1228509, OPP-1248097, AST-1310896, AST-1440254, AST-1555365, AST-1614868, AST-1615796, AST-1715061, AST-1716327, AST-1716536, OISE-1743747, AST-1816420, AST-1935980, AST-2034306); NSF Astronomy and Astrophysics Postdoctoral Fellowship (AST-1903847); the Natural Science Foundation of China (grants 11650110427, 10625314, 11721303, 11725312, 11873028, 11933007, 11991052, 11991053, 12192220, 12192223); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Youth Thousand Talents Program of China; the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants NRF-2015H1A2A1033752, the Korea Research Fellowship Program: NRF-2015H1D3A1066561, Brain Pool Program: 2019H1D3A1A01102564, Basic Research Support Grant 2019R1F1A1059721, 2021R1A6A3A01086420, 2022R1C1C1005255); Netherlands Research School for Astronomy (NOVA) Virtual Institute of Accretion (VIA) postdoctoral fellowships; Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 2017-00648); the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Ciencia e Innovación (grants PGC2018-098915-B-C21, AYA2016-80889-P, PID2019-108995GB-C21, PID2020-117404GB-C21); the University of Pretoria for financial aid in the provision of the new Cluster Server nodes and SuperMicro (USA) for a SEEDING GRANT approved towards these nodes in 2020; the Shanghai Pilot Program for Basic Research, Chinese Academy of Science, Shanghai Branch (JCYJ-SHFY-2021-013); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofísica de Andalucía (SEV-2017- 0709); the Spinoza Prize SPI 78-409; the South African Research Chairs Initiative, through the South African Radio Astronomy Observatory (SARAO, grant ID 77948), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Innovation (DSI) of South Africa; the Toray Science Foundation; Swedish Research Council (VR); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000001); and the YCAA Prize Postdoctoral Fellowship. APEX is a collaboration between the Max-Planck-Institut für Radioastronomie (Germany), ESO, and the Onsala Space Observatory (Sweden). The SMA is a joint project between the SAO and ASIAA and is funded by the Smithsonian Institution and the Academia Sinica. The JCMT is operated by the East Asian Observatory on behalf of the NAOJ, ASIAA, and KASI, as well as the Ministry of Finance of China, Chinese Academy of Sciences, and the National Key Research and Development Program (No. 2017YFA0402700) of China and Natural Science Foundation of China grant 11873028. Additional funding support for the JCMT is provided by the Science and Technologies Facility Council (UK) and participating universities in the UK and Canada. The LMT is a project operated by the Instituto Nacional de Astrófisica, Óptica, y Electrónica (Mexico) and the University of Massachusetts at Amherst (USA). The IRAM 30-m telescope on Pico Veleta, Spain is operated by IRAM and supported by CNRS (Centre National de la Recherche Scientifique, France), MPG (Max-Planck-Gesellschaft, Germany) and IGN (Instituto Geográfico Nacional, Spain). The SMT is operated by the Arizona Radio Observatory, a part of the Steward Observatory of the University of Arizona, with financial support of operations from the State of Arizona and financial support for instrumentation development from the NSF. Support for SPT participation in the EHT is provided by the National Science Foundation through award OPP-1852617 to the University of Chicago. Partial support is also provided by the Kavli Institute of Cosmological Physics at the University of Chicago. The SPT hydrogen maser was provided on loan from the GLT, courtesy of ASIAA. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI-1743442. XSEDE Stampede2 resource at TACC was allocated through TG-AST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. This research is part of the Frontera computing project at the Texas Advanced Computing Center through the Frontera Large-Scale Community Partnerships allocation AST20023. Frontera is made possible by National Science Foundation award OAC-1818253. This research was carried out using resources provided by the Open Science Grid, which is supported by the National Science Foundation and the U.S. Department of Energy Office of Science. Additional work used ABACUS2.0, which is part of the eScience center at Southern Denmark University. Simulations were also performed on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, on the HazelHen cluster at the HLRS in Stuttgart, and on the Pi2.0 and Siyuan Mark-I at Shanghai Jiao Tong University. The computer resources of the Finnish IT Center for Science (CSC) and the Finnish Computing Competence Infrastructure (FCCI) project are acknowledged. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).
Published: 2022

241. First Sagittarius A* Event Horizon Telescope results. V. Testing astrophysical models of the Galactic Center black hole

Author: null Event Horizon Telescope Collaboration, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do-Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Chi-kwan Chan, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Vedant Dhruv, Sheperd S. Doeleman, Sean Dougal, Sergio A. Dzib, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, José L. Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Kari Haworth, Michael H. Hecht, Ronald Hesper, Dirk Heumann, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jiménez-Rosales, Michael D. Johnson, Svetlana Jorstad, Abhishek V. Joshi, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Michael Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Noemi La Bella, Tod R. Lauer, Daeyoung Lee, Sang-Sung Lee, Po Kin Leung, Aviad Levis, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Ru-Sen Lu, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Daniel Michalik, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Cornelia Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Andrew Nadolski, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Cristina Romero-Cañizales, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Kamal Souccar, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Pablo Torne, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Maciek Wielgus, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, George N. Wong, Qingwen Wu, Paul Yamaguchi, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, Shan-Shan Zhao, Tin Lok Chan, Richard Qiu, Sean Ressler, Chris White, Ministerio de Ciencia e Innovación (España), European Commission, European Research Council, Swedish Research Council, Science and Technology Facilities Council (UK), Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. -K., Ball, D., Balokovic, M., Barrett, J., Baubock, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. -Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chan, C. -K., Chatterjee, K., Chatterjee, S., Chen, M. -T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Doeleman, S. S., Dougal, S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., Garcia, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gomez-Ruiz, A. I., Gomez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Haworth, K., Hecht, M. H., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. -W. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., Jimenez-Rosales, A., Johnson, M. D., Jorstad, S., Joshi, A. V., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D. -J., Kim, J. -Y., Kim, J., Kino, M., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, M., Krichbaum, T. P., Kuo, C. -Y., Bella, N. L., Lauer, T. R., Lee, D., Lee, S. -S., Leung, P. K., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. -P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lu, R. -S., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Marti-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Michalik, D., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Moscibrodzka, M., Muller, C., Mus, A., Musoke, G., Myserlis, I., Nadolski, A., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. N., Neilsen, J., Neri, R., Ni, C., Noutsos, A., Nowak, M. A., Oh, J., Okino, H., Olivares, H., Ortiz-Leon, G. N., Oyama, T., Ozel, F., Palumbo, D. C. M., Paraschos, G. F., Park, J., Parsons, H., Patel, N., Pen, U. -L., Pesce, D. W., Pietu, V., Plambeck, R., Popstefanija, A., Porth, O., Potzl, F. M., Prather, B., Preciado-Lopez, J. A., Psaltis, D., Pu, H. -Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Ros, E., Romero-Canizales, C., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sanchez, S., Sanchez-Arguelles, D., Sanchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K. -F., Shao, L., Shen, Z., Small, D., Sohn, B. W., Soohoo, J., Souccar, K., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Torne, P., Traianou, E., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Weintroub, J., Wex, N., Wharton, R., Wielgus, M., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yamaguchi, P., Yoon, D., Young, A., Young, K., Younsi, Z., Yuan, F., Yuan, Y. -F., Zensus, J. A., Zhang, S., Zhao, G. -Y., Zhao, S. -S., Chan, T. 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[0000-0002-6579-8311], Prather, Ben [0000-0002-0393-7734], Preciado-López, Jorge A. [0000-0002-4146-0113], Psaltis, Dimitrios [0000-0003-1035-3240], Pu, Hung-Yi [0000-0001-9270-8812], Ramakrishnan, Venkatessh [0000-0002-9248-086X], Rao, Ramprasad [0000-0002-1407-7944], Rawlings, Mark G. [0000-0002-6529-202X], Raymond, Alexander W. [0000-0002-5779-4767], Rezzolla, Luciano [0000-0002-1330-7103], Ricarte, Angelo [0000-0001-5287-0452], Ripperda, Bart [0000-0002-7301-3908], Roelofs, Freek [0000-0001-5461-3687], Rogers, Alan [0000-0003-1941-7458], Ros, Eduardo [0000-0001-9503-4892], Romero-Cañizales, Cristina [0000-0001-6301-9073], Roshanineshat, Arash [0000-0002-8280-9238], Roy, Alan L. [0000-0002-1931-0135], Ruiz, Ignacio [0000-0002-0965-5463], Ruszczyk, Chet [0000-0001-7278-9707], Rygl, Kazi L. J. [0000-0003-4146-9043], Sánchez, Salvador [0000-0002-8042-5951], Sánchez-Argüelles, David [0000-0002-7344-9920], Sánchez-Portal, Miguel [0000-0003-0981-9664], Sasada, Mahito [0000-0001-5946-9960], Satapathy, Kaushik [0000-0003-0433-3585], Savolainen, Tuomas [0000-0001-6214-1085], Schonfeld, Jonathan [0000-0002-8909-2401], Schuster, Karl-Friedrich [0000-0003-2890-9454], Shao, Lijing [0000-0002-1334-8853], Shen, Zhiqiang [0000-0003-3540-8746], Small, Des [0000-0003-3723-5404], Sohn, Bong Won [0000-0002-4148-8378], SooHoo, Jason [0000-0003-1938-0720], Souccar, Kamal [0000-0001-7915-5272], Sun, He [0000-0003-1526-6787], Tazaki, Fumie [0000-0003-0236-0600], Tetarenko, Alexandra J. [0000-0003-3906-4354], Tiede, Paul [0000-0003-3826-5648], Tilanus, Remo P. J. [0000-0002-6514-553X], Titus, Michael [0000-0001-9001-3275], Torne, Pablo [0000-0001-8700-6058], Traianou, Efthalia [0000-0002-1209-6500], Trippe, Sascha [0000-0003-0465-1559], Turk, Matthew [0000-0002-5294-0198], van Bemmel, Ilse [0000-0001-5473-2950], van Langevelde, Huib Jan [0000-0002-0230-5946], van Rossum, Daniel R. [0000-0001-7772-6131], Vos, Jesse [0000-0003-3349-7394], Wagner, Jan [0000-0003-1105-6109], Ward-Thompson, Derek [0000-0003-1140-2761], Wardle, John [0000-0002-8960-2942], Weintroub, Jonathan [0000-0002-4603-5204], Wex, Norbert [0000-0003-4058-2837], Wharton, Robert [0000-0002-7416-5209], Wielgus, Maciek [0000-0002-8635-4242], Wiik, Kaj [0000-0002-0862-3398], Witzel, Gunther [0000-0003-2618-797X], Wondrak, Michael F. [0000-0002-6894-1072], Wong, George N. [0000-0001-6952-2147], Wu, Qingwen [0000-0003-4773-4987], Yamaguchi, Paul [0000-0002-6017-8199], Yoon, Doosoo [0000-0001-8694-8166], Young, André [0000-0003-0000-2682], Young, Ken [0000-0002-3666-4920], Younsi, Ziri [0000-0001-9283-1191], Yuan, Feng [0000-0003-3564-6437], Yuan, Ye-Fei [0000-0002-7330-4756], Zensus, J. Anton [0000-0001-7470-3321], Zhang, Shuo [0000-0002-2967-790X], Zhao, Guang-Yao [0000-0002-4417-1659], Zhao, Shan-Shan [0000-0002-9774-3606], Chan, Tin Lok [0000-0001-9197-932X], Qiu, Richard [0000-0003-3462-0817], Ressler, Sean [0000-0003-0220-5723], White, Chris [0000-0001-7448-4253], Apollo - University of Cambridge Repository, High Energy Astrophys. & Astropart. Phys (API, FNWI), and Astronomy
Subjects: F520, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, F521, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Black hole physics, Galactic center, 5101 Astronomical Sciences, Space and Planetary Science, 51 Physical Sciences, High-Energy Phenomena and Fundamental Physics, Astrophysics::Galaxy Astrophysics, Mathematics
Abstract: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Full list of authors: Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen, Yongjun; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Dhruv, Vedant; Doeleman, Sheperd S.; Dougal, Sean; Dzib, Sergio A.; Eatough, Ralph P.; Emami, Razieh; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; Garcia, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gold, Roman; Gomez-Ruiz, Arturo, I; Gomez, Jose L.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Haworth, Kari; Hecht, Michael H.; Hesper, Ronald; Heumann, Dirk; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Impellizzeri, C. M. Violette; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Joshi, Abhishek, V; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kocherlakota, Prashant; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Carsten; Kramer, Michael; Krichbaum, Thomas P.; Kuo, Cheng-Yu; La Bella, Noemi; Lauer, Tod R.; Lee, Daeyoung; Lee, Sang-Sung; Leung, Po Kin; Levis, Aviad; Li, Zhiyuan; Lico, Rocco; Lindahl, Greg; Lindqvist, Michael; Lisakov, Mikhail; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin J.; Lu, Ru-Sen; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Marti-Vidal, Ivan; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Michalik, Daniel; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Mueller, Cornelia; Mus, Alejandro; Musoke, Gibwa; Myserlis, Ioannis; Nadolski, Andrew; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Fuentes, Santiago Navarro; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Oh, Junghwan; Okino, Hiroki; Olivares, Hector; Ortiz-Leon, Gisela N.; Oyama, Tomoaki; Ozel, Feryal; Palumbo, Daniel C. M.; Paraschos, Georgios Filippos; Park, Jongho; Parsons, Harriet; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Potzl, Felix M.; Ben Prather; Preciado-Lopez, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Romero-Canizales, Cristina; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruiz, Ignacio; Ruszczyk, Chet; Rygl, Kazi L. J.; Sanchez, Salvador; Sanchez-Arguelles, David; Sanchez-Portal, Miguel; Sasada, Mahito; Satapathy, Kaushik; Savolainen, Tuomas; Schloerb, F. Peter; Schonfeld, Jonathan; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Des Small; Sohn, Bong Won; SooHoo, Jason; Souccar, Kamal; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Torne, Pablo; Traianou, Efthalia; Trent, Tyler; Trippe, Sascha; Turk, Matthew; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Vos, Jesse; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wiik, Kaj; Witzel, Gunther; Wondrak, Michael F.; Wong, George N.; Wu, Qingwen; Yamaguchi, Paul; Yoon, Doosoo; Young, Andre; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhang, Shuo; Zhao, Guang-Yao; Zhao, Shan-Shan; Chan, Tin Lok; Qiu, Richard; Ressler, Sean; White, Chris; Event Horizon Telescope Collaboration., In this paper we provide a first physical interpretation for the Event Horizon Telescope's (EHT) 2017 observations of Sgr A*. Our main approach is to compare resolved EHT data at 230 GHz and unresolved non-EHT observations from radio to X-ray wavelengths to predictions from a library of models based on time-dependent general relativistic magnetohydrodynamics simulations, including aligned, tilted, and stellar-wind-fed simulations; radiative transfer is performed assuming both thermal and nonthermal electron distribution functions. We test the models against 11 constraints drawn from EHT 230 GHz data and observations at 86 GHz, 2.2 μm, and in the X-ray. All models fail at least one constraint. Light-curve variability provides a particularly severe constraint, failing nearly all strongly magnetized (magnetically arrested disk (MAD)) models and a large fraction of weakly magnetized models. A number of models fail only the variability constraints. We identify a promising cluster of these models, which are MAD and have inclination i ≤ 30°. They have accretion rate (5.2–9.5) × 10−9 M⊙ yr−1, bolometric luminosity (6.8–9.2) × 1035 erg s−1, and outflow power (1.3–4.8) × 1038 erg s−1. We also find that all models with i ≥ 70° fail at least two constraints, as do all models with equal ion and electron temperature; exploratory, nonthermal model sets tend to have higher 2.2 μm flux density; and the population of cold electrons is limited by X-ray constraints due to the risk of bremsstrahlung overproduction. Finally, we discuss physical and numerical limitations of the models, highlighting the possible importance of kinetic effects and duration of the simulations. © 2022. The Author(s). Published by the American Astronomical Society., The Event Horizon Telescope Collaboration thanks the following organizations and programs: the Academia Sinica; the Academy of Finland (projects 274477, 284495, 312496, 315721); the Agencia Nacional de Investigación y Desarrollo (ANID), Chile via NCN19_058 (TITANs) and Fondecyt 1221421, the Alexander von Humboldt Stiftung; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the ALMA North America Development Fund; the Black Hole Initiative, which is funded by grants from the John Templeton Foundation and the Gordon and Betty Moore Foundation (although the opinions expressed in this work are those of the author(s) and do not necessarily reflect the views of these Foundations); Chandra DD7-18089X and TM6-17006X; the China Scholarship Council; China Postdoctoral Science Foundation fellowship (2020M671266); Consejo Nacional de Ciencia y Tecnología (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037-279006, F0003-281692, 104497, 275201, 263356); the Consejería de Economía, Conocimiento, Empresas y Universidad of the Junta de Andalucía (grant P18-FR-1769), the Consejo Superior de Investigaciones Científicas (grant 2019AEP112); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Dirección General de Asuntos del Personal Académico-Universidad Nacional Autónoma de México (DGAPA-UNAM, projects IN112417 and IN112820); the Dutch Organization for Scientific Research (NWO) VICI award (grant 639.043.513) and grant OCENW.KLEIN.113; the Dutch National Supercomputers, Cartesius and Snellius (NWO Grant 2021.013); the EACOA Fellowship awarded by the East Asia Core Observatories Association, which consists of the Academia Sinica Institute of Astronomy and Astrophysics, the National Astronomical Observatory of Japan, Center for Astronomical Mega-Science, Chinese Academy of Sciences, and the Korea Astronomy and Space Science Institute; the European Research Council (ERC) Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the European Union Horizon 2020 research and innovation programme under grant agreements RadioNet (No 730562) and M2FINDERS (No 101018682); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the European Research Council for advanced grant 'JETSET: Launching, propagation and emission of relativistic jets from binary mergers and across mass scales' (Grant No. 884631); the Institute for Advanced Study; the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; DFG research grant "Jet physics on horizon scales and beyond" (Grant No. FR 4069/2-1); Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japan Ministry of Education, Culture, Sports, Science and Technology (MEXT; grant JPMXP1020200109); the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829); the Joint Institute for Computational Fundamental Science, Japan; the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSW-SLH057, QYZDJSSW-SYS008, ZDBS-LY-SLH011); the Leverhulme Trust Early Career Research Fellowship; the Max-Planck-Gesellschaft (MPG); the Max Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP21H01137, JP18H03721, JP18K13594, 18K03709, JP19K14761, 18H01245, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (103-2119-M-001-010-MY2, 105-2112-M-001-025-MY3, 105-2119-M-001-042, 106-2112-M-001-011, 106-2119-M-001-013, 106-2119-M-001-027, 106-2923-M-001-005, 107-2119-M-001-017, 107-2119-M-001-020, 107-2119-M-001-041, 107-2119-M-110-005, 107-2923-M-001-009, 108-2112-M-001-048, 108-2112-M-001-051, 108-2923-M-001-002, 109-2112-M-001-025, 109-2124-M-001-005, 109-2923-M-001-001, 110-2112-M-003-007-MY2, 110-2112-M-001-033, 110-2124-M-001-007, and 110-2923-M-001-001); the Ministry of Education (MoE) of Taiwan Yushan Young Scholar Program; the Physics Division, National Center for Theoretical Sciences of Taiwan; the National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, NASA NuSTAR award 80NSSC20K0645); NASA Hubble Fellowship grant HST-HF2-51431.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555; the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2017YFA0402703, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST-0521233, AST-0705062, AST-0905844, AST-0922984, AST-1126433, AST-1140030, DGE-1144085, AST-1207704, AST-1207730, AST-1207752, MRI-1228509, OPP-1248097, AST-1310896, AST-1440254, AST-1555365, AST-1614868, AST-1615796, AST-1715061, AST-1716327, AST-1716536, OISE-1743747, AST-1816420, AST-1935980, AST-2034306); NSF Astronomy and Astrophysics Postdoctoral Fellowship (AST-1903847); the Natural Science Foundation of China (grants 11650110427, 10625314, 11721303, 11725312, 11873028, 11933007, 11991052, 11991053, 12192220, 12192223); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Youth Thousand Talents Program of China; the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants NRF-2015H1A2A1033752, the Korea Research Fellowship Program: NRF-2015H1D3A1066561, Brain Pool Program: 2019H1D3A1A01102564, Basic Research Support Grant 2019R1F1A1059721, 2021R1A6A3A01086420, 2022R1C1C1005255); Netherlands Research School for Astronomy (NOVA) Virtual Institute of Accretion (VIA) postdoctoral fellowships; Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 2017-00648); the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Ciencia e Innovación (grants PGC2018-098915-B-C21, AYA2016-80889-P, PID2019-108995GB-C21, PID2020-117404GB-C21); the University of Pretoria for financial aid in the provision of the new Cluster Server nodes and SuperMicro (USA) for a SEEDING GRANT approved towards these nodes in 2020; the Shanghai Pilot Program for Basic Research, Chinese Academy of Science, Shanghai Branch (JCYJ-SHFY-2021-013); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofísica de Andalucía (SEV-2017- 0709); the Spinoza Prize SPI 78-409; the South African Research Chairs Initiative, through the South African Radio Astronomy Observatory (SARAO, grant ID 77948), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Innovation (DSI) of South Africa; the Toray Science Foundation; Swedish Research Council (VR); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000001); and the YCAA Prize Postdoctoral Fellowship. APEX is a collaboration between the Max-Planck-Institut für Radioastronomie (Germany), ESO, and the Onsala Space Observatory (Sweden). The SMA is a joint project between the SAO and ASIAA and is funded by the Smithsonian Institution and the Academia Sinica. The JCMT is operated by the East Asian Observatory on behalf of the NAOJ, ASIAA, and KASI, as well as the Ministry of Finance of China, Chinese Academy of Sciences, and the National Key Research and Development Program (No. 2017YFA0402700) of China and Natural Science Foundation of China grant 11873028. Additional funding support for the JCMT is provided by the Science and Technologies Facility Council (UK) and participating universities in the UK and Canada. The LMT is a project operated by the Instituto Nacional de Astrófisica, Óptica, y Electrónica (Mexico) and the University of Massachusetts at Amherst (USA). The IRAM 30-m telescope on Pico Veleta, Spain is operated by IRAM and supported by CNRS (Centre National de la Recherche Scientifique, France), MPG (Max-Planck-Gesellschaft, Germany) and IGN (Instituto Geográfico Nacional, Spain). The SMT is operated by the Arizona Radio Observatory, a part of the Steward Observatory of the University of Arizona, with financial support of operations from the State of Arizona and financial support for instrumentation development from the NSF. Support for SPT participation in the EHT is provided by the National Science Foundation through award OPP-1852617 to the University of Chicago. Partial support is also provided by the Kavli Institute of Cosmological Physics at the University of Chicago. The SPT hydrogen maser was provided on loan from the GLT, courtesy of ASIAA. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI-1743442. XSEDE Stampede2 resource at TACC was allocated through TG-AST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. This research is part of the Frontera computing project at the Texas Advanced Computing Center through the Frontera Large-Scale Community Partnerships allocation AST20023. Frontera is made possible by National Science Foundation award OAC-1818253. This research was carried out using resources provided by the Open Science Grid, which is supported by the National Science Foundation and the U.S. Department of Energy Office of Science. Additional work used ABACUS2.0, which is part of the eScience center at Southern Denmark University. Simulations were also performed on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, on the HazelHen cluster at the HLRS in Stuttgart, and on the Pi2.0 and Siyuan Mark-I at Shanghai Jiao Tong University. The computer resources of the Finnish IT Center for Science (CSC) and the Finnish Computing Competence Infrastructure (FCCI) project are acknowledged. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).
Published: 2022

242. Polarimetric Properties of Event Horizon Telescope Targets from ALMA

Author: Ciriaco Goddi, Iván Martí-Vidal, Hugo Messias, Geoffrey C. Bower, Avery E. Broderick, Jason Dexter, Daniel P. Marrone, Monika Moscibrodzka, Hiroshi Nagai, Juan Carlos Algaba, Keiichi Asada, Geoffrey B. Crew, José L. Gómez, C. M. Violette Impellizzeri, Michael Janssen, Matthias Kadler, Thomas P. Krichbaum, Rocco Lico, Lynn D. Matthews, Antonios Nathanail, Angelo Ricarte, Eduardo Ros, Ziri Younsi, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Richard Anantua, Rebecca Azulay, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Wilfred Boland, Katherine L. Bouman, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Do-Young Byun, John E. Carlstrom, Andrew Chael, Chi-kwan Chan, Shami Chatterjee, Koushik Chatterjee, Ming-Tang Chen, Yongjun Chen, Paul M. Chesler, Ilje Cho, Pierre Christian, John E. Conway, James M. Cordes, Thomas M. Crawford, Alejandro Cruz-Osorio, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Sheperd S. Doeleman, Ralph P. Eatough, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Roman Gold, Arturo I. Gómez-Ruiz, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Michael D. Johnson, Svetlana Jorstad, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Michael Kramer, Carsten Kramer, Cheng-Yu Kuo, Tod R. Lauer, Sang-Sung Lee, Aviad Levis, Yan-Rong Li, Zhiyuan Li, Michael Lindqvist, Greg Lindahl, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Alan P. Marscher, Satoki Matsushita, Lia Medeiros, Karl M. Menten, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Cornelia Müller, Gibwa Musoke, Alejandro Mus Mejías, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Jongho Park, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Bart Ripperda, Freek Roelofs, Alan Rogers, Mel Rose, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Arguelles, Mahito Sasada, Tuomas Savolainen, F. Peter Schloerb, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Tyler Trent, Efthalia Traianou, Sascha Trippe, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Maciek Wielgus, George N. Wong, Qingwen Wu, Doosoo Yoon, André Young, Ken Young, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Guang-Yao Zhao, Shan-Shan Zhao, Gabriele Bruni, A. Gopakumar, Antonio Hernández-Gómez, Ruben Herrero-Illana, Adam Ingram, S. Komossa, Y. Y. Kovalev, Dirk Muders, Manel Perucho, Florian Rösch, Mauri Valtonen, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Academy of Finland, European Commission, Harvard University, Agencia Nacional de Investigación y Desarrollo (Chile), Comisión Nacional de Investigación Científica y Tecnológica (Chile), Consejo Nacional de Ciencia y Tecnología (México), Universidad Nacional Autónoma de México, European Research Council, Generalitat Valenciana, Ministerio de Ciencia e Innovación (España), Gordon and Betty Moore Foundation, Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Ministry of Science and Technology (Taiwan), National Aeronautics and Space Administration (US), National Key Research and Development Program (China), National Science Foundation (US), National Natural Science Foundation of China, National Research Foundation of Korea, Netherlands Organization for Scientific Research, Swedish Research Council, Ministerio de Economía y Competitividad (España), Junta de Andalucía, National Nuclear Security Administration (US), Ministero dell'Istruzione, dell'Università e della Ricerca, Ministerio de Ciencia, Innovación y Universidades (España), China Postdoctoral Science Foundation, Consejo Superior de Investigaciones Científicas (España), Astronomy, Goddi, Ciriaco, Martí-Vidal, Iván, Messias, Hugo, Bower, Geoffrey C., Broderick, Avery E., Dexter, Jason, Marrone, Daniel P., Moscibrodzka, Monika, Nagai, Hiroshi, Algaba, Juan Carlo, Asada, Keiichi, Crew, Geoffrey B., Gómez, José L., Impellizzeri, C. M. Violette, Janssen, Michael, Kadler, Matthia, Krichbaum, Thomas P., Lico, Rocco, Matthews, Lynn D., Nathanail, Antonio, Ricarte, Angelo, Ros, Eduardo, Younsi, Ziri, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broguiere, Dominique, Bronzwaer, Thoma, Byun, Do-Young, Carlstrom, John E., Chael, Andrew, Chan, Chi-kwan, Chatterjee, Shami, Chatterjee, Koushik, Chen, Ming-Tang, Chen, Yongjun, Chesler, Paul M., Cho, Ilje, Christian, Pierre, Conway, John E., Cordes, James M., Crawford, Thomas M., Cruz-Osorio, Alejandro, Cui, Yuzhu, Davelaar, Jordy, De Laurentis, Mariafelicia, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Farah, Joseph, Fish, Vincent L., Fomalont, Ed, Ford, H. Alyson, Fraga-Encinas, Raquel, Freeman, William T., Friberg, Per, Fromm, Christian M., Fuentes, Antonio, Galison, Peter, Gammie, Charles F., García, Roberto, Gentaz, Olivier, Georgiev, Bori, Gold, Roman, Gómez-Ruiz, Arturo I., Gu, Minfeng, Gurwell, Mark, Hada, Kazuhiro, Haggard, Daryl, Hecht, Michael H., Hesper, Ronald, Ho, Luis C., Ho, Paul, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Inoue, Makoto, Issaoun, Sara, James, David J., Jannuzi, Buell T., Jeter, Britton, Jiang, Wu, Jimenez-Rosales, Alejandra, Johnson, Michael D., Jorstad, Svetlana, Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kawashima, Tomohisa, Keating, Garrett K., Kettenis, Mark, Kim, Dong-Jin, Kim, Jae-Young, Kim, Jongsoo, Kim, Junhan, Kino, Motoki, Koay, Jun Yi, Kofuji, Yutaro, Koch, Patrick M., Koyama, Shoko, Kramer, Michael, Kramer, Carsten, Kuo, Cheng-Yu, Lauer, Tod R., Lee, Sang-Sung, Levis, Aviad, Li, Yan-Rong, Li, Zhiyuan, Lindqvist, Michael, Lindahl, Greg, Liu, Jun, Liu, Kuo, Liuzzo, Elisabetta, Lo, Wen-Ping, Lobanov, Andrei P., Loinard, Laurent, Lonsdale, Colin, Lu, Ru-Sen, Macdonald, Nicholas R., Mao, Jirong, Marchili, Nicola, Markoff, Sera, Marscher, Alan P., Matsushita, Satoki, Medeiros, Lia, Menten, Karl M., Mizuno, Izumi, Mizuno, Yosuke, Moran, James M., Moriyama, Kotaro, Müller, Cornelia, Musoke, Gibwa, Mejías, Alejandro Mu, Nagar, Neil M., Nakamura, Masanori, Narayan, Ramesh, Narayanan, Gopal, Natarajan, Iniyan, Neilsen, Joey, Neri, Roberto, Ni, Chunchong, Noutsos, Aristeidi, Nowak, Michael A., Okino, Hiroki, Olivares, Héctor, Ortiz-León, Gisela N., Oyama, Tomoaki, Özel, Feryal, Palumbo, Daniel C. M., Park, Jongho, Patel, Nimesh, Pen, Ue-Li, Pesce, Dominic W., Piétu, Vincent, Plambeck, Richard, Popstefanija, Aleksandar, Porth, Oliver, Pötzl, Felix M., Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrio, Pu, Hung-Yi, Ramakrishnan, Venkatessh, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Rose, Mel, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruszczyk, Chet, Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Sasada, Mahito, Savolainen, Tuoma, Schloerb, F. Peter, Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, De, Sohn, Bong Won, Soohoo, Jason, Sun, He, Tazaki, Fumie, Tetarenko, Alexandra J., Tiede, Paul, Tilanus, Remo P. J., Titus, Michael, Toma, Kenji, Torne, Pablo, Trent, Tyler, Traianou, Efthalia, Trippe, Sascha, Bemmel, Ilse van, van Langevelde, Huib Jan, van Rossum, Daniel R., Wagner, Jan, Ward-Thompson, Derek, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wielgus, Maciek, Wong, George N., Wu, Qingwen, Yoon, Doosoo, Young, André, Young, Ken, Yuan, Feng, Yuan, Ye-Fei, Zensus, J. Anton, Zhao, Guang-Yao, Zhao, Shan-Shan, Bruni, Gabriele, Gopakumar, A., Hernández-Gómez, Antonio, Herrero-Illana, Ruben, Ingram, Adam, Komossa, S., Kovalev, Y. Y., Muders, Dirk, Perucho, Manel, Rösch, Florian, Valtonen, Mauri, and High Energy Astrophys. & Astropart. Phys (API, FNWI)
Subjects: 010504 meteorology & atmospheric sciences, Astronomy, Astrophysics - astrophysics of galaxies, Astrophysics, Astrophysics - high energy astrophysical phenomena, 01 natural sciences, Radio galaxies, Supermassive black holes, Radio jets, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Linear polarization, Polarization (waves), Wavelength, Long baseline interferometry, 994, 1390, 16, 1347, 1278, 808, 932, 565, 1663, 164, 1343, 1319, Magnitude (astronomy), symbols, Astrophysics - instrumentation and methods for astrophysics, FOS: Physical sciences, F500, Galactic center, symbols.namesake, Polarimetry, 0103 physical sciences, Faraday effect, Very-long-baseline interferometry, Quasars, Instrumentation and Methods for Astrophysics (astro-ph.IM), 0105 earth and related environmental sciences, Event Horizon Telescope, Active galactic nuclei, Photosphere, Astronomy and Astrophysics, Interferometry, 13. Climate action, Space and Planetary Science, Magnetic fields, Astrophysics of Galaxies (astro-ph.GA), Relativistic jets, Blazars
Abstract: Full list of authors: Goddi, Ciriaco; Martí-Vidal, Iván; Messias, Hugo; Bower, Geoffrey C.; Broderick, Avery E.; Dexter, Jason; Marrone, Daniel P.; Moscibrodzka, Monika; Nagai, Hiroshi; Algaba, Juan Carlos; Asada, Keiichi; Crew, Geoffrey B.; Gómez, José L.; Impellizzeri, C. M. Violette; Janssen, Michael; Kadler, Matthias; Krichbaum, Thomas P.; Lico, Rocco; Matthews, Lynn D.; Nathanail, Antonios Ricarte, Angelo; Ros, Eduardo; Younsi, Ziri; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Anantua, Richard; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Baloković, Mislav; Barrett, John; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Gold, Roman; Gómez-Ruiz, Arturo I.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Kuo, Cheng-Yu; Lauer, Tod R.; Lee, Sang-Sung; Levis, Aviad; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lindahl, Greg; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; Lu, Ru-Sen; MacDonald, Nicholas R.; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marscher, Alan P.; Matsushita, Satoki; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Müller, Cornelia; Musoke, Gibwa; Mejías, Alejandro Mus; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Okino, Hiroki; Olivares, Héctor; Ortiz-León, Gisela N.; Oyama, Tomoaki; Özel, Feryal; Palumbo, Daniel C. M.; Park, Jongho; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Piétu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Pötzl, Felix M.; Prather, Ben; Preciado-López, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L. J.; Sánchez, Salvador; Sánchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, André; Young, Ken; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhao, Shan-Shan; Bruni, Gabriele; Gopakumar, A.; Hernández-Gómez, Antonio; Herrero-Illana, Ruben; Ingram, Adam; Komossa, S.; Kovalev, Y. Y.; Muders, Dirk; Perucho, Manel; Rösch, Florian; Valtonen, Mauri.-- This is an open access article, original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI., We present the results from a full polarization study carried out with the Atacama Large Millimeter/submillimeter Array (ALMA) during the first Very Long Baseline Interferometry (VLBI) campaign, which was conducted in 2017 April in the λ3 mm and λ1.3 mm bands, in concert with the Global mm-VLBI Array (GMVA) and the Event Horizon Telescope (EHT), respectively. We determine the polarization and Faraday properties of all VLBI targets, including Sgr A*, M87, and a dozen radio-loud active galactic nuclei (AGNs), in the two bands at several epochs in a time window of 10 days. We detect high linear polarization fractions (2%–15%) and large rotation measures (RM > 103.3–105.5 rad m−2), confirming the trends of previous AGN studies at millimeter wavelengths. We find that blazars are more strongly polarized than other AGNs in the sample, while exhibiting (on average) order-of-magnitude lower RM values, consistent with the AGN viewing angle unification scheme. For Sgr A* we report a mean RM of (−4.2 ± 0.3) × 105 rad m−2 at 1.3 mm, consistent with measurements over the past decade and, for the first time, an RM of (–2.1 ± 0.1) × 105 rad m−2 at 3 mm, suggesting that about half of the Faraday rotation at 1.3 mm may occur between the 3 mm photosphere and the 1.3 mm source. We also report the first unambiguous measurement of RM toward the M87 nucleus at millimeter wavelengths, which undergoes significant changes in magnitude and sign reversals on a one year timescale, spanning the range from −1.2 to 0.3 × 105 rad m−2 at 3 mm and −4.1 to 1.5 × 105 rad m−2 at 1.3 mm. Given this time variability, we argue that, unlike the case of Sgr A*, the RM in M87 does not provide an accurate estimate of the mass accretion rate onto the black hole. We put forward a two-component model, comprised of a variable compact region and a static extended region, that can simultaneously explain the polarimetric properties observed by both the EHT (on horizon scales) and ALMA (which observes the combined emission from both components). These measurements provide critical constraints for the calibration, analysis, and interpretation of simultaneously obtained VLBI data with the EHT and GMVA. © 2021. The American Astronomical Society., ALMA is a partnership of the European Southern Observatory (ESO; Europe, representing its member states), NSF, andNational Institutes of Natural Sciences of Japan, together with National Research Council (Canada), Ministry of Science and Technology (MOST; Taiwan), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA; Taiwan), and Korea Astronomy and Space Science Institute (KASI; Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, Associated Universities, Inc. (AUI)/NRAO, and the National Astronomical Observatory of Japan (NAOJ). The NRAO is a facility of the NSF operated under cooperative agreement by AUI. This Letter makes use of the following ALMA data: ADS/JAO.ALMA#2016.1.00413.V ADS/JAO.ALMA#2016. 1.01116.V ADS/JAO.ALMA#2016.1.01216.V ADS/JAO. ALMA#2016.1.01114.V ADS/JAO.ALMA#2016.1.01154.V ADS/JAO.ALMA#2016.1.01176.V ADS/JAO.ALMA#2016. 1.01198.V ADS/JAO.ALMA#2016.1.01290.V ADS/JAO. ALMA#2016.1.01404.V ADS/JAO.ALMA#2017.1.00841.V ADS/JAO.ALMA#2013.1.01022.S ADS/JAO.ALMA#2015. 1.01170.S ADS/JAO.ALMA#2016.1.00415.S ADS/JAO. ALMA#2017.1.00608.S The authors of the present Letter thank the following organizations and programs: the Academy of Finland (projects 274477, 284495, 312496, 315721); the Advanced European Network of E-infrastructures for Astronomy with the SKA (AENEAS) project, supported by the European Commission Framework Programme Horizon 2020 Research and Innovation action under grant agreement 731016; the Alexander von Humboldt Stiftung; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the black hole Initiative at Harvard University, through a grant (60477) from the John Templeton Foundation; the China Scholarship Council; Agencia Nacional de Investigacion y Desarrollo (ANID), Chile via NCN19_058 (TITANs) and Fondecyt 3190878; Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037-279006, F0003-281692, 104497, 275201, 263356); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Direccion General de Asuntos del Personal AcademicoUniversidad Nacional Autonoma de Mexico (DGAPA-UNAM, projects IN112417 and IN112820); the European Research Council Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the Gordon and Betty Moore Foundation (grants GBMF-3561, GBMF-5278); the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; the Jansky Fellowship program of the National Radio Astronomy Observatory (NRAO); Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829); the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSWSLH057, QYZDJSSW-SYS008, ZDBS-LY-SLH011); the Leverhulme Trust Early Career Research Fellowship; the MaxPlanck-Gesellschaft (MPG); the Max Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP18K13594, JP18K03656, JP18H03721, 18K03709, 18H01245, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (105-2112-M-001-025-MY3, 106-2112-M-001-011, 106-2119-M-001-027, 107-2119-M-001-017, 107-2119-M-001020, and 107-2119-M-110-005, MOST 108-2112-M-001-048 and MOST 109-2124-M-001-005); the National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, and Hubble Fellowship grant HST-HF251431.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. , for NASA, under contract NAS5-26555,); the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST-0521233, AST-0705062, AST-0905844, AST-0922984, AST-1126433, AST-1140030, DGE-1144085, AST-1207704, AST-1207730, AST-1207752, MRI-1228509, OPP-1248097, AST-1310896, AST-1337663, AST-1440254, AST-1555365, AST-1615796, AST-1715061, AST-1716327, AST-1716536, OISE-1743747, AST-1816420, AST-1903847, AST-1935980, AST-2034306); the Natural Science Foundation of China (grants 11573051, 11633006, 11650110427, 10625314, 11721303, 11725312, 11933007, 11991052, 11991053); a fellowship of China Postdoctoral Science Foundation (2020M671266); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Youth Thousand Talents Program of China; the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants NRF-2015H1A2A1033752, 2015R1D1A1A01056807, the Korea Research Fellowship Program: NRF-2015H1D3A1066561, Basic Research Support Grant 2019R1F1A1059721); the Netherlands Organization for Scientific Research (NWO) VICI award (grant 639.043.513) and Spinoza Prize SPI 78-409; the New Scientific Frontiers with Precision Radio Interferometry Fellowship awarded by the South African Radio Astronomy Observatory (SARAO), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Technology (DST) of South Africa; the Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 2017-00648) the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Economia y Competitividad (grants PGC2018098915-B-C21, AYA2016-80889-P, PID2019-108995GB-C21); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709); the Toray Science Foundation; the Consejeria de Economia, Conocimiento, Empresas y Universidad of the Junta de Andalucia (grant P18-FR-1769), the Consejo Superior de Investigaciones Cientificas (grant 2019AEP112); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000001); the Italian Ministero dell'Istruzione Universita e Ricerca through the grant Progetti Premiali 2012-iALMA (CUP C52I13000140001); the European Union's Horizon 2020 research and innovation program under grant agreement No 730562 RadioNet; ALMA North America Development Fund; the Academia Sinica; Chandra TM6-17006X; the GenT Program (Generalitat Valenciana) Project CIDEGENT/2018/021; NASA NuSTAR award 80NSSC20K0645; Chandra award DD7-18089X. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI-1743442. XSEDE Stampede2 resource at TACC was allocated through TG-AST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. The simulations were performed in part on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, and on the HazelHen cluster at the HLRS in Stuttgart. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).We thank the staff at the participating observatories in the GMVA and EHT, correlation centers, and institutions for their enthusiastic support. The GMVA is coordinated by the VLBI group at the Max-Planck-Institut fur Radioastronomie (MPIfR) and consists of telescopes operated by MPIfR, IRAM, Onsala, Metsahovi, Yebes, the Korean VLBI Network, the Green Bank Observatory and the VLBA. APEX is a collaboration between the MPIfR (Germany), ESO, and the Onsala Space Observatory (Sweden). The SMA is a joint project between the SAO and ASIAA and is funded by the Smithsonian Institution and the Academia Sinica. The JCMT is operated by the East Asian Observatory on behalf of the NAOJ, ASIAA, and KASI, as well as the Ministry of Finance of China, Chinese Academy of Sciences, and the National Key R&D Program (No. 2017YFA0402700) of China. Additional funding support for the JCMT is provided by the Science and Technologies Facility Council (UK) and participating universities in the UK and Canada. The LMT is a project operated by the Instituto Nacional de Astrofisica, Optica, y Electronica (Mexico) and the University of Massachusetts at Amherst (USA). The IRAM 30m telescope on Pico Veleta, Spain is operated by IRAM and supported by CNRS (Centre National de la Recherche Scientifique, France), MPG (Max-Planck-Gesellschaft, Germany) and IGN (Instituto Geografico Nacional, Spain). The SMT is operated by the Arizona Radio Observatory, a part of the Steward Observatory of the University of Arizona, with financial support of operations from the State of Arizona and financial support for instrumentation development from the NSF. The SPT is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-1125897 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation and the Gordon and Betty Moore Foundation grant GBMF 947. The SPT hydrogen maser was provided on loan from the GLT, courtesy of ASIAA. The EHTC has received generous donations of FPGA chips from Xilinx Inc., under the Xilinx University Program. The EHTC has benefited from technology shared under open-source license by the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER). The EHT project is grateful to T4Science and Microsemi for their assistance with Hydrogen Masers. This research has made use of NASA's Astrophysics Data System. We gratefully acknowledge the support provided by the extended staff of the ALMA, both from the inception of the ALMA Phasing Project through the observational campaigns of 2017 and 2018. We would like to thank A. Deller and W. Brisken for EHT-specific support with the use of DiFX. We thank Sergio Martin for the help interpreting the Sgr A* spectrum in SPW= 2. We acknowledge the significance that Maunakea, where the SMA and JCMT EHT stations are located, has for the indigenous Hawaiian people. M.P. acknowledges support by the Spanish Ministry of Science through Grants PID2019-105510GB-C31, and PID2019-107427GB-C33, and from the Generalitat Valenciana through grant PROMETEU/2019/071.
Published: 2021

243. The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole

Author: Maciek Wielgus, Raquel Fraga-Encinas, Mark G. Rawlings, Michael Janssen, Laurent Loinard, Tyler Trent, Satoki Matsushita, Patrick M. Koch, Kazi L.J. Rygl, Roberto Neri, Jun Liu, Luis C. Ho, Michael Bremer, Britton Jeter, Rocco Lico, Remo P. J. Tilanus, Izumi Mizuno, Vincent L. Fish, André Young, Jorge A. Preciado-López, Paul Tiede, Per Friberg, Huib Jan van Langevelde, Pablo Torne, Dan Bintley, Buell T. Jannuzi, Boris Georgiev, Wen Ping Lo, Geoffrey C. Bower, Bart Ripperda, Dominique Broguiere, H. Alyson Ford, Tod R. Lauer, Angelo Ricarte, Daryl Haggard, Roger Brissenden, Mahito Sasada, W. Boland, Ramprasad Rao, Keiichi Asada, David H. Hughes, Antonios Nathanail, Michael Titus, Dong-Jin Kim, Masanori Nakamura, Freek Roelofs, Ken Young, Karl Friedrich Schuster, Ramesh Narayan, Ronald Hesper, Doosoo Yoon, Des Small, Felix M. Pötzl, Richard Anantua, Shiro Ikeda, Heino Falcke, Antonio Fuentes, John E. Carlstrom, Ramesh Karuppusamy, Charles F. Gammie, Joseph R. Farah, Ilje Cho, Lia Medeiros, Jun Yi Koay, Efthalia Traianou, David Ball, C. Y. Kuo, Vincent Piétu, Paul T. P. Ho, J. Neilsen, Derek Ward-Thompson, Chi-kwan Chan, Aviad Levis, John Conway, Ye-Fei Yuan, Garrett K. Keating, Eduardo Ros, Jae-Young Kim, Roberto Garcia, Svetlana G. Jorstad, Wu Jiang, Ue-Li Pen, Yosuke Mizuno, Roman Gold, Geoffrey B. Crew, Alan L. Roy, Yuzhu Cui, Gibwa Musoke, David Sánchez-Arguelles, Zhiyuan Li, Aleksandar Popstefanija, Karl M. Menten, Kotaro Moriyama, Aristeidis Noutsos, Katherine L. Bouman, Monika Moscibrodzka, Jason SooHoo, Ming-Tang Chen, Hiroshi Nagai, Andrei Lobanov, Nicola Marchili, Helge Rottmann, Mark Kettenis, Venkatessh Ramakrishnan, Jason Dexter, Do-Young Byun, Juan-Carlos Algaba, Alexandra J. Tetarenko, Ralph Eatough, Ben Prather, Yi Chen, Michael H. Hecht, Shoko Koyama, Chunchong Ni, Sera Markoff, Cornelia Müller, Elizabeth Himwich, Sara Issaoun, Fumie Tazaki, John E. Barrett, Lei Huang, Nicholas R. MacDonald, Pierre Christian, Sascha Trippe, Elisabetta Liuzzo, Gisela N. Ortiz-León, Peter Galison, Norbert Wex, Colin J. Lonsdale, Arturo I. Gómez-Ruiz, Michael Lindqvist, Hope Boyce, Andrew Chael, Nimesh A. Patel, Dimitrios Psaltis, Daniel P. Marrone, Bong Won Sohn, Bradford Benson, Mark Gurwell, Alejandro Cruz-Osorio, Ivan Marti-Vidal, Ciriaco Goddi, Hung Yi Pu, Ed Fomalont, Taehyun Jung, Makoto Inoue, John F. C. Wardle, Tomoaki Oyama, Motoki Kino, James M. Moran, Minfeng Gu, Mislav Baloković, Yan-Rong Li, Shami Chatterjee, Michael A. Nowak, Lynn D. Matthews, Avery E. Broderick, Jongho Park, Koushik Chatterjee, Ziri Younsi, Chet Ruszczyk, Sheperd S. Doeleman, Hiroki Okino, Alan E. E. Rogers, Rebecca Azulay, Tuomas Savolainen, Neil M. Nagar, Silke Britzen, Mel Rose, Christian M. Fromm, Tomohisa Kawashima, T. M. Crawford, Zhi-Qiang Shen, Walter Alef, Feryal Özel, George N. Wong, Jirong Mao, Kazuhiro Hada, Raymond Blundell, James M. Cordes, Jonathan Weintroub, Michael Kramer, Oliver Porth, Thomas P. Krichbaum, Dominic W. Pesce, Gopal Narayanan, Alexander W. Raymond, Greg Lindahl, Mariafelicia De Laurentis, Kuo Liu, Gregory Desvignes, Anne Kathrin Baczko, Chih-Wei Locutus Huang, Lijing Shao, Yutaro Kofuji, Daniel R. van Rossum, Ru-Sen Lu, Christiaan D. Brinkerink, Zachary Gelles, He Sun, Feng Yuan, Junhan Kim, Mansour Karami, José L. Gómez, Hector Olivares, Olivier Gentaz, A. Jiménez-Rosales, Thomas Bronzwaer, David J. James, Alan P. Marscher, Alejandro Mus Mejías, Robert Wharton, Dominic O. Chang, Guang Yao Zhao, Arash Roshanineshat, Sang-Sung Lee, Shan Shan Zhao, S. Sánchez, Jessica Dempsey, Ilse van Bemmel, Michael D. Johnson, F. Peter Schloerb, J. Anton Zensus, Kenji Toma, Antxon Alberdi, Carsten Kramer, Jan Wagner, Roger Deane, Paul M. Chesler, Luciano Rezzolla, Jordy Davelaar, Jongsoo Kim, Iniyan Natarajan, Daniel C. M. Palumbo, Mareki Honma, Qingwen Wu, Lindy Blackburn, Richard Plambeck, Kazunori Akiyama, National Science Foundation (US), Gordon and Betty Moore Foundation, John Templeton Foundation, National Aeronautics and Space Administration (US), Academy of Finland, Agencia Nacional de Investigación y Desarrollo (Chile), Comisión Nacional de Investigación Científica y Tecnológica (Chile), Universidad Nacional Autónoma de México, European Commission, European Research Council, Generalitat Valenciana, Japan Society for the Promotion of Science, National Key Research and Development Program (China), Ministry of Education, Culture, Sports, Science and Technology (Japan), National Research Foundation of Korea, Netherlands Organization for Scientific Research, Swedish Research Council, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Junta de Andalucía, Harvard University, University of Colorado Boulder, University of Illinois at Urbana-Champaign, Princeton University, CSIC, Max Planck Institute for Radio Astronomy, University of Malaya, Academia Sinica - Institute of Astronomy and Astrophysics, University of Arizona, Massachusetts Institute of Technology, United States Department of Energy, East Asian Observatory, Nederlandse Onderzoekschool voor Astronomie (NOVA), McGill University, Institut de Radio Astronomie Millimétrique, Radboud University Nijmegen, Perimeter Institute for Theoretical Physics, Korea Astronomy and Space Science Institute, University of Chicago, Cornell Center for Astrophysics and Planetary Science, University of Amsterdam, CAS - Shanghai Astronomical Observatory, Fairfield University, Chalmers University of Technology, Goethe University Frankfurt, National Astronomical Observatory of Japan, University of the Witwatersrand, Observatoire de Paris, National Radio Astronomy Observatory, University of Waterloo, Instituto Nacional de Astrofisica Optica y Electronica, University of Groningen, Peking University, Boston University, The University of Tokyo, Joint Institute for VLBI in Europe, National Optical Astronomy Observatory, California Institute of Technology, CAS - Institute of High Energy Physics, Nanjing University, INAF Istituto di Radioastronomia, Instituto de Radioastronomía y Astrofísica, CAS - National Astronomical Observatories, Universidad de Valencia, Universidad de Concepción, Villanova University, Washington University St. Louis, University of California Berkeley, University of Massachusetts, Simons Foundation, IRAM, Anne Lähteenmäki Group, Tohoku University, Seoul National University, University of Central Lancashire, Brandeis University, Huazhong University of Science and Technology, University of Science and Technology of China, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Narayan, Ramesh, Palumbo, Daniel C. M., Johnson, Michael D., Gelles, Zachary, Himwich, Elizabeth, Chang, Dominic O., Ricarte, Angelo, Dexter, Jason, Gammie, Charles F., Chael, Andrew A., Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlo, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E., Broguiere, Dominique, Bronzwaer, Thoma, Byun, Do-Young, Carlstrom, John E., Chan, Chi-kwan, Chatterjee, Shami, Chatterjee, Koushik, Chen, Ming-Tang, Chen, Yongjun, Chesler, Paul M., Cho, Ilje, Christian, Pierre, Conway, John E., Cordes, James M., Crawford, Thomas M., Crew, Geoffrey B., Cruz-Osorio, Alejandro, Cui, Yuzhu, Davelaar, Jordy, De Laurentis, Mariafelicia, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Farah, Joseph, Fish, Vincent L., Fomalont, Ed, Ford, H. Alyson, Fraga-Encinas, Raquel, Friberg, Per, Fromm, Christian M., Fuentes, Antonio, Galison, Peter, García, Roberto, Gentaz, Olivier, Georgiev, Bori, Goddi, Ciriaco, Gold, Roman, Gómez, José L., Gómez-Ruiz, Arturo I., Gu, Minfeng, Gurwell, Mark, Hada, Kazuhiro, Haggard, Daryl, Hecht, Michael H., Hesper, Ronald, Ho, Luis C., Ho, Paul, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Ikeda, Shiro, Inoue, Makoto, Issaoun, Sara, James, David J., Jannuzi, Buell T., Janssen, Michael, Jeter, Britton, Jiang, Wu, Jimenez-Rosales, Alejandra, Jorstad, Svetlana, Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kawashima, Tomohisa, Keating, Garrett K., Kettenis, Mark, Kim, Dong-Jin, Kim, Jae-Young, Kim, Jongsoo, Kim, Junhan, Kino, Motoki, Koay, Jun Yi, Kofuji, Yutaro, Koch, Patrick M., Koyama, Shoko, Kramer, Michael, Kramer, Carsten, Krichbaum, Thomas P., Kuo, Cheng-Yu, Lauer, Tod R., Lee, Sang-Sung, Levis, Aviad, Li, Yan-Rong, Li, Zhiyuan, Lindqvist, Michael, Lico, Rocco, Lindahl, Greg, Liu, Jun, Liu, Kuo, Liuzzo, Elisabetta, Lo, Wen-Ping, Lobanov, Andrei P., Loinard, Laurent, Lonsdale, Colin, Lu, Ru-Sen, Macdonald, Nicholas R., Mao, Jirong, Marchili, Nicola, Markoff, Sera, Marrone, Daniel P., Marscher, Alan P., Martí-Vidal, Iván, Matsushita, Satoki, Matthews, Lynn D., Medeiros, Lia, Menten, Karl M., Mizuno, Izumi, Mizuno, Yosuke, Moran, James M., Moriyama, Kotaro, Moscibrodzka, Monika, Müller, Cornelia, Musoke, Gibwa, Mejías, Alejandro Mu, Nagai, Hiroshi, Nagar, Neil M., Nakamura, Masanori, Narayanan, Gopal, Natarajan, Iniyan, Nathanail, Antonio, Neilsen, Joey, Neri, Roberto, Ni, Chunchong, Noutsos, Aristeidi, Nowak, Michael A., Okino, Hiroki, Olivares, Héctor, Ortiz-León, Gisela N., Oyama, Tomoaki, Özel, Feryal, Park, Jongho, Patel, Nimesh, Pen, Ue-Li, Pesce, Dominic W., Piétu, Vincent, Plambeck, Richard, Popstefanija, Aleksandar, Porth, Oliver, Pötzl, Felix M., Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrio, Pu, Hung-Yi, Ramakrishnan, Venkatessh, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Ros, Eduardo, Rose, Mel, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruszczyk, Chet, Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Sasada, Mahito, Savolainen, Tuoma, Schloerb, F. Peter, Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, De, Sohn, Bong Won, Soohoo, Jason, Sun, He, Tazaki, Fumie, Tetarenko, Alexandra J., Tiede, Paul, Tilanus, Remo P. J., Titus, Michael, Toma, Kenji, Torne, Pablo, Trent, Tyler, Traianou, Efthalia, Trippe, Sascha, van Bemmel, Ilse, van Langevelde, Huib Jan, van Rossum, Daniel R., Wagner, Jan, Ward-Thompson, Derek, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wielgus, Maciek, Wong, George N., Wu, Qingwen, Yoon, Doosoo, Young, André, Young, Ken, Younsi, Ziri, Yuan, Feng, Yuan, Ye-Fei, Zensus, J. Anton, Zhao, Guang-Yao, Zhao, Shan-Shan, Astronomy, and High Energy Astrophys. & Astropart. Phys (API, FNWI)
Subjects: Astrofísica, Camps magnètics, Accretion, 010504 meteorology & atmospheric sciences, Astronomy, Astrophysics::High Energy Astrophysical Phenomena, Strong gravitational lensing, Synchrotron radiation, FOS: Physical sciences, F500, 01 natural sciences, Astrophysics - high energy astrophysical phenomena, General Relativity and Quantum Cosmology, 0103 physical sciences, Polarimetry, Schwarzschild metric, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, astro-ph.HE, Event Horizon Telescope, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Accretion (meteorology), Black holes, Astronomy and Astrophysics, Polarization (waves), Computational physics, Magnetic field, Black hole, Space and Planetary Science, Magnetic fields, 14, 162, 1278, 994
Abstract: Full list of authors: Narayan, Ramesh; Palumbo, Daniel C. M.; Johnson, Michael D.; Gelles, Zachary; Himwich, Elizabeth; Chang, Dominic O.; Ricarte, Angelo; Dexter, Jason; Gammie, Charles F.; Chael, Andrew A.; Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David Baloković, Mislav; Barrett, John; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gold, Roman; Gómez, José L.; Gómez-Ruiz, Arturo I.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Jorstad, Svetlana; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Krichbaum, Thomas P.; Kuo, Cheng-Yu; Lauer, Tod R.; Lee, Sang-Sung; Levis, Aviad; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Lindahl, Greg; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; Lu, Ru-Sen; MacDonald, Nicholas R.; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Martí-Vidal, Iván; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Müller, Cornelia; Musoke, Gibwa; Mejías, Alejandro Mus; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Okino, Hiroki; Olivares, Héctor; Ortiz-León, Gisela N.; Oyama, Tomoaki; Özel, Feryal; Park, Jongho; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Piétu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Pötzl, Felix M.; Prather, Ben; Preciado-López, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L. J.; Sánchez, Salvador; Sánchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, André; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhao, Shan-Shan.--This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI., Synchrotron radiation from hot gas near a black hole results in a polarized image. The image polarization is determined by effects including the orientation of the magnetic field in the emitting region, relativistic motion of the gas, strong gravitational lensing by the black hole, and parallel transport in the curved spacetime. We explore these effects using a simple model of an axisymmetric, equatorial accretion disk around a Schwarzschild black hole. By using an approximate expression for the null geodesics derived by Beloborodov and conservation of the Walker–Penrose constant, we provide analytic estimates for the image polarization. We test this model using currently favored general relativistic magnetohydrodynamic simulations of M87*, using ring parameters given by the simulations. For a subset of these with modest Faraday effects, we show that the ring model broadly reproduces the polarimetric image morphology. Our model also predicts the polarization evolution for compact flaring regions, such as those observed from Sgr A* with GRAVITY. With suitably chosen parameters, our simple model can reproduce the EVPA pattern and relative polarized intensity in Event Horizon Telescope images of M87*. Under the physically motivated assumption that the magnetic field trails the fluid velocity, this comparison is consistent with the clockwise rotation inferred from total intensity images. © 2021 The Author(s). Published by the American Astronomical Society., We thank the National Science Foundation (awards OISE1743747, AST-1816420, AST-1716536, AST-1440254, AST1935980) and the Gordon and Betty Moore Foundation (GBMF-5278) for financial support of this work. This work was supported in part by the black hole Initiative, which is funded by grants from the John Templeton Foundation and the Gordon and Betty Moore Foundation to Harvard University. Support for this work was also provided by the NASA Hubble Fellowship grant HST-HF2-51431.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. The Event Horizon Telescope Collaboration thanks the following organizations and programs: the Academy of Finland (projects 274477, 284495, 312496, 315721); the Agencia Nacional de Investigacion y Desarrollo (ANID), Chile via NCN19_058 (TITANs) and Fondecyt 3190878, the Alexander von Humboldt Stiftung; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the black hole Initiative at Harvard University, through a grant (60477) from the John Templeton Foundation; the China Scholarship Council; Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037279006, F0003-281692, 104497, 275201, 263356); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Direccion General de Asuntos del Personal Academico-Universidad Nacional Autonoma de Mexico (DGAPA-UNAM, projects IN112417 and IN112820); the European Research Council Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the Gordon and Betty Moore Foundation (grant GBMF-3561; the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829 and JP19H01943); the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSW-SLH057, QYZDJSSW-SYS008, ZDBS-LYSLH011); the Leverhulme Trust Early Career Research Fellowship; the Max-Planck-Gesellschaft (MPG); the Max Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP18K13594, JP18K03656, JP18H03721, 18K03709, 18H01245, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (105-2112-M-001-025-MY3, 106-2112-M-001-011, 106-2119-M-001-027, 107-2119-M-001017, 107-2119-M-001-020,107-2119-M-110-005, 108-2112-M001-048, and 109-2124-M-001-005); the National Aeronautics and SpaceAdministration (NASA grant NNX17AL82G, Fermi Guest Investigator grant 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, NASA NuSTAR award 80NSSC20K0645); the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST-0521233, AST-0705062, AST-0905844, AST-0922984, AST-1126433, AST-1140030, DGE-1144085, AST-1207704, AST-1207730, AST-1207752, MRI-1228509, OPP-1248097, AST-1310896, AST-1555365, AST-1615796, AST-1715061, AST-1716327, AST-1903847, AST-2034306); the Natural Science Foundation of China (grants 11573051, 11633006, 11650110427, 10625314, 11721303, 11725312, 11933007, 11991052, 11991053); a fellowship of China Postdoctoral Science Foundation (2020M671266); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants NRF-2015H1A2A1033752, 2015R1D1A1A01056807, the Korea Research Fellowship Program: NRF-2015H1D3A1066561, Basic Research Support Grant 2019R1F1A1059721); the Netherlands Organization for Scientific Research (NWO) VICI award (grant 639.043. 513) and Spinoza Prize SPI 78-409; the New Scientific Frontiers with Precision Radio Interferometry Fellowship awarded by the South African Radio Astronomy Observatory (SARAO), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Innovation (DSI) of South Africa; the South African Research Chairs Initiative of the Department of Science and Innovation and National Research Foundation; the Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 201700648) the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Economia y Competitividad (grants PGC2018-098915-B-C21, AYA2016-80889-P, PID2019-108995GB-C21); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709); the Toray Science Foundation; the Consejeria de Economia, Conocimiento, Empresas y Universidad of the Junta de Andalucia (grant P18-FR-1769), the Consejo Superior de Investigaciones Cientificas (grant 2019AEP112); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000001); the European Union's Horizon 2020 research and innovation program under grant agreement No. 730562 RadioNet; ALMA North America Development Fund; the Academia Sinica; Chandra DD7-18089X and TM6-17006X; the GenT Program (Generalitat Valenciana) Project CIDEGENT/2018/021. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI-1743442. XSEDE Stampede2 resource at TACC was allocated through TGAST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. The simulations were performed in part on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, and on the HazelHen cluster at the HLRS in Stuttgart. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).We thank the staff at the participating observatories, correlation centers, and institutions for their enthusiastic support. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2016.1.01154.V. ALMA is a partnership of the European Southern Observatory (ESO; Europe, representing its member states), NSF, and National Institutes of Natural Sciences of Japan, together with National Research Council (Canada), Ministry of Science and Technology (MOST; Taiwan), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA; Taiwan), and Korea Astronomy and Space Science Institute (KASI; Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, Associated Universities, Inc. (AUI)/NRAO, and the National Astronomical Observatory of Japan (NAOJ). The NRAO is a facility of the NSF operated under cooperative agreement by AUI. APEX is a collaboration between the Max-Planck-Institut fur Radioastronomie (Germany), ESO, and the Onsala Space Observatory (Sweden). The SMA is a joint project between the SAO and ASIAA and is funded by the Smithsonian Institution and the Academia Sinica. The JCMT is operated by the East Asian Observatory on behalf of the NAOJ, ASIAA, and KASI, as well as the Ministry of Finance of China, Chinese Academy of Sciences, and the National Key R&D Program (No. 2017YFA0402700) of China. Additional funding support for the JCMT is provided by the Science and Technologies Facility Council (UK) and participating universities in the UK and Canada. The LMT is a project operated by the Instituto Nacional de Astrofisica, Optica, y Electronica (Mexico) and the University of Massachusetts at Amherst (USA), with financial support from the Consejo Nacional de Ciencia y Tecnologia and the National Science Foundation. The IRAM 30m telescope on Pico Veleta, Spain is operated by IRAM and supported by CNRS (Centre National de la Recherche Scientifique, France), MPG (MaxPlanck-Gesellschaft, Germany) and IGN (Instituto Geografico Nacional, Spain). The SMT is operated by the Arizona Radio Observatory, a part of the Steward Observatory of the University of Arizona, with financial support of operations from the State of Arizona and financial support for instrumentation development from the NSF. The SPT is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-1125897 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation and the Gordon and Betty Moore Foundation grant GBMF 947. The SPT hydrogen maser was provided on loan from the GLT, courtesy of ASIAA. The EHTC has received generous donations of FPGA chips from Xilinx Inc., under the Xilinx University Program. The EHTC has benefited from technology shared under open-source license by the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER). The EHT project is grateful to T4Science and Microsemi for their assistance with Hydrogen Masers. This research has made use of NASA's Astrophysics Data System. We gratefully acknowledge the support provided by the extended staff of the ALMA, both from the inception of the ALMA Phasing Project through the observational campaigns of 2017 and 2018. We would like to thank A. Deller and W. Brisken for EHTspecific support with the use of DiFX. We acknowledge the significance that Maunakea, where the SMA and JCMT EHT stations are located, has for the indigenous Hawaiian people.
Published: 2021
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244. First M87 Event Horizon Telescope Results. VII. Polarization of the Ring

Author: Makoto Inoue, Kotaro Moriyama, Michael Titus, Freek Roelofs, Walter Alef, Jason Dexter, Do-Young Byun, Minfeng Gu, Katherine L. Bouman, Felix M. Pötzl, Richard Anantua, Shami Chatterjee, Michael A. Nowak, André Young, Hope Boyce, Juan-Carlos Algaba, Bong Won Sohn, Shiro Ikeda, Jun Yi Koay, Chet Ruszczyk, Silke Britzen, David Ball, Chih-Wei Locutus Huang, Lijing Shao, Christiaan D. Brinkerink, John E. Barrett, Svetlana G. Jorstad, Yi Chen, Peter Galison, Bradford Benson, Pablo Torne, Sera Markoff, Yan-Rong Li, George N. Wong, Jirong Mao, Gibwa Musoke, Arturo I. Gómez-Ruiz, Richard Plambeck, Dimitrios Psaltis, Buell T. Jannuzi, Roberto Garcia, Per Friberg, Norbert Wex, Daniel P. Marrone, Boris Georgiev, Tod R. Lauer, Nimesh A. Patel, He Sun, M. Balokovic, Kazuhiro Hada, Lynn D. Matthews, Avery E. Broderick, Masanori Nakamura, Ken Young, Feng Yuan, Daniel Michalik, Antonios Nathanail, Ciriaco Goddi, David H. Hughes, Heino Falcke, Ye-Fei Yuan, W. Boland, Garrett K. Keating, Jae-Young Kim, Aleksandar Popstefanija, Chunchong Ni, Jongho Park, Karl Friedrich Schuster, Ronald Hesper, Ramprasad Rao, Helge Rottmann, Vincent Piétu, Ziri Younsi, Roman Gold, Patrick M. Koch, Britton Jeter, Ed Fomalont, Rocco Lico, Ralph Eatough, Taehyun Jung, Michael Lindqvist, Geoffrey B. Crew, David Sánchez-Arguelles, Andrew Nadolski, Junhan Kim, Huib Jan van Langevelde, Feryal zel, Charles F. Gammie, Ramesh Karuppusamy, Paul T. P. Ho, Derek Ward-Thompson, Mark Gurwell, Wen Ping Lo, Geoffrey C. Bower, Bart Ripperda, Dominique Broguiere, Angelo Ricarte, Alejandro Cruz-Osorio, Ivan Marti-Vidal, Kenji Toma, Antxon Alberdi, Sheperd S. Doeleman, Venkatessh Ramakrishnan, Chi-kwan Chan, Karl M. Menten, Aristeidis Noutsos, Tuomas Savolainen, Neil M. Nagar, Hung Yi Pu, Doosoo Yoon, Michael H. Hecht, Lei Huang, Keiichi Asada, Ilse van Bemmel, Michael D. Johnson, J. Anton Zensus, Koushik Chatterjee, Alan E. E. Rogers, Rebecca Azulay, Andrew Chael, Monika Moscibrodzka, John F. C. Wardle, Tomoaki Oyama, Motoki Kino, Mark Kettenis, Des Small, Izumi Mizuno, Alejandro Mus Mejías, Christian M. Fromm, Olivier Gentaz, A. Jiménez-Rosales, Alan L. Roy, Jason SooHoo, Vincent L. Fish, Shoko Koyama, Robert Wharton, David J. James, John E. Carlstrom, Antonio Fuentes, Pierre Christian, Ue-Li Pen, Yosuke Mizuno, Efthalia Traianou, Roger Brissenden, Paul Tiede, Alexandra J. Tetarenko, Roger Deane, Paul M. Chesler, Sara Issaoun, Lia Medeiros, Zhi-Qiang Shen, C. Y. Kuo, Aviad Levis, J. Neilsen, William T. Freeman, Mahito Sasada, Nicholas R. MacDonald, John Conway, Eduardo Ros, Mel Rose, Alan P. Marscher, Sascha Trippe, Ramesh Narayan, Guang Yao Zhao, Ming-Tang Chen, Arash Roshanineshat, Elisabetta Liuzzo, Fumie Tazaki, Thomas Bronzwaer, Gisela N. Ortiz-León, Hiroshi Nagai, Yuzhu Cui, Andrei Lobanov, Cornelia Müller, Nicola Marchili, Colin J. Lonsdale, Joseph R. Farah, Mareki Honma, Hector Olivares, Raymond Blundell, James M. Cordes, Jonathan Weintroub, Michael Bremer, Tomohisa Kawashima, T. M. Crawford, Sang-Sung Lee, Ben Prather, Michael Kramer, Shan Shan Zhao, Oliver Porth, Dan Bintley, Lindy Blackburn, Thomas P. Krichbaum, Wu Jiang, Dominic W. Pesce, Daniel R. van Rossum, Carsten Kramer, Jan Wagner, Zhiyuan Li, Jordy Davelaar, Hiroki Okino, James M. Moran, Gopal Narayanan, Alexander W. Raymond, Greg Lindahl, Gregory Desvignes, Anne Kathrin Baczko, Ru-Sen Lu, Roberto Neri, Jun Liu, Luis C. Ho, Luciano Rezzolla, Jongsoo Kim, Iniyan Natarajan, Dong-Jin Kim, Daniel C. M. Palumbo, Qingwen Wu, Michael Janssen, Tyler Trent, Laurent Loinard, Satoki Matsushita, Kazi L.J. Rygl, Jessica Dempsey, H. Alyson Ford, Jorge A. Preciado-López, Ilje Cho, F. Peter Schloerb, Mariafelicia De Laurentis, Kuo Liu, Yutaro Kofuji, Mansour Karami, José L. Gómez, Kazunori Akiyama, Maciek Wielgus, Raquel Fraga-Encinas, Mark G. Rawlings, S. Sánchez, Remo P. J. Tilanus, Daryl Haggard, Akiyama, Kazunori, Algaba, Juan Carlo, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E., Broguiere, Dominique, Bronzwaer, Thoma, Byun, Do-Young, Carlstrom, John E., Chael, Andrew, Chan, Chi-kwan, Chatterjee, Shami, Chatterjee, Koushik, Chen, Ming-Tang, Chen, Yongjun, Chesler, Paul M., Cho, Ilje, Christian, Pierre, Conway, John E., Cordes, James M., Crawford, Thomas M., Crew, Geoffrey B., Cruz-Osorio, Alejandro, Cui, Yuzhu, Davelaar, Jordy, De Laurentis, Mariafelicia, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Dexter, Jason, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Farah, Joseph, Fish, Vincent L., Fomalont, Ed, Ford, H. Alyson, Fraga-Encinas, Raquel, Freeman, William T., Friberg, Per, Fromm, Christian M., Fuentes, Antonio, Galison, Peter, Gammie, Charles F., García, Roberto, Gentaz, Olivier, Georgiev, Bori, Goddi, Ciriaco, Gold, Roman, Gómez, José L., Gómez-Ruiz, Arturo I., Gu, Minfeng, Gurwell, Mark, Hada, Kazuhiro, Haggard, Daryl, Hecht, Michael H., Hesper, Ronald, Ho, Luis C., Ho, Paul, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Ikeda, Shiro, Inoue, Makoto, Issaoun, Sara, James, David J., Jannuzi, Buell T., Janssen, Michael, Jeter, Britton, Jiang, Wu, Jimenez-Rosales, Alejandra, Johnson, Michael D., Jorstad, Svetlana, Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kawashima, Tomohisa, Keating, Garrett K., Kettenis, Mark, Kim, Dong-Jin, Kim, Jae-Young, Kim, Jongsoo, Kim, Junhan, Kino, Motoki, Koay, Jun Yi, Kofuji, Yutaro, Koch, Patrick M., Koyama, Shoko, Kramer, Michael, Kramer, Carsten, Krichbaum, Thomas P., Kuo, Cheng-Yu, Lauer, Tod R., Lee, Sang-Sung, Levis, Aviad, Li, Yan-Rong, Li, Zhiyuan, Lindqvist, Michael, Lico, Rocco, Lindahl, Greg, Liu, Jun, Liu, Kuo, Liuzzo, Elisabetta, Lo, Wen-Ping, Lobanov, Andrei P., Loinard, Laurent, Lonsdale, Colin, Lu, Ru-Sen, Macdonald, Nicholas R., Mao, Jirong, Marchili, Nicola, Markoff, Sera, Marrone, Daniel P., Marscher, Alan P., Martí-Vidal, Iván, Matsushita, Satoki, Matthews, Lynn D., Medeiros, Lia, Menten, Karl M., Mizuno, Izumi, Mizuno, Yosuke, Moran, James M., Moriyama, Kotaro, Moscibrodzka, Monika, Müller, Cornelia, Musoke, Gibwa, Mejías, Alejandro Mu, Michalik, Daniel, Nadolski, Andrew, Nagai, Hiroshi, Nagar, Neil M., Nakamura, Masanori, Narayan, Ramesh, Narayanan, Gopal, Natarajan, Iniyan, Nathanail, Antonio, Neilsen, Joey, Neri, Roberto, Ni, Chunchong, Noutsos, Aristeidi, Nowak, Michael A., Okino, Hiroki, Olivares, Héctor, Ortiz-León, Gisela N., Oyama, Tomoaki, Özel, Feryal, Palumbo, Daniel C. M., Park, Jongho, Patel, Nimesh, Pen, Ue-Li, Pesce, Dominic W., Piétu, Vincent, Plambeck, Richard, Popstefanija, Aleksandar, Porth, Oliver, Pötzl, Felix M., Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrio, Pu, Hung-Yi, Ramakrishnan, Venkatessh, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ricarte, Angelo, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Ros, Eduardo, Rose, Mel, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruszczyk, Chet, Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Sasada, Mahito, Savolainen, Tuoma, Schloerb, F. Peter, Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, De, Sohn, Bong Won, Soohoo, Jason, Sun, He, Tazaki, Fumie, Tetarenko, Alexandra J., Tiede, Paul, Tilanus, Remo P. J., Titus, Michael, Toma, Kenji, Torne, Pablo, Trent, Tyler, Traianou, Efthalia, Trippe, Sascha, Bemmel, Ilse van, van Langevelde, Huib Jan, van Rossum, Daniel R., Wagner, Jan, Ward-Thompson, Derek, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wielgus, Maciek, Wong, George N., Wu, Qingwen, Yoon, Doosoo, Young, André, Young, Ken, Younsi, Ziri, Yuan, Feng, Yuan, Ye-Fei, Zensus, J. Anton, Zhao, Guang-Yao, Zhao, Shan-Shan, Academy of Finland, European Commission, Agencia Nacional de Investigación y Desarrollo (Chile), Comisión Nacional de Investigación Científica y Tecnológica (Chile), John Templeton Foundation, Consejo Nacional de Ciencia y Tecnología (México), Universidad Nacional Autónoma de México, European Research Council, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Gordon and Betty Moore Foundation, Ministry of Education, Culture, Sports, Science and Technology (Japan), Japan Society for the Promotion of Science, Chinese Academy of Sciences, Ministry of Science and Technology (Taiwan), National Aeronautics and Space Administration (US), National Key Research and Development Program (China), National Science Foundation (US), National Natural Science Foundation of China, China Postdoctoral Science Foundation, National Research Foundation of Korea, Netherlands Organization for Scientific Research, Spinoza Prize, Swedish Research Council, Ministerio de Ciencia, Innovación y Universidades (España), Junta de Andalucía, Consejo Superior de Investigaciones Científicas (España), Department of Energy (US), Astronomy, High Energy Astrophys. & Astropart. Phys (API, FNWI), Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University
Subjects: 010504 meteorology & atmospheric sciences, Kino, Astrophysics - astrophysics of galaxies, Astronomy, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Galaxy accretion disks, 01 natural sciences, Astrophysics - high energy astrophysical phenomena, Galaxies: individual: M87, 1278, 1346, 1769, 1663, 16, 2033, 1859, 562, 0103 physical sciences, Polarimetry, Supermassive black holes, 010303 astronomy & astrophysics, Astronomy data modeling, 0105 earth and related environmental sciences, Very long baseline interferometry, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Active galactic nuclei, Galaxies: individual: M87, F510, Chatterjee, Astronomy and Astrophysics, Creative commons, Low-luminosity active galactic nuclei, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), %22">Fish , Radio interferometry, Humanities
Abstract: Full list of authors: Akiyama, Kazunori; Algaba, Juan Carlos; Alberdi, Antxon; Alef, Walter; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Baloković, Mislav; Barrett, John; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gold, Roman; Gómez, José L.; Gómez-Ruiz, Arturo I.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Krichbaum, Thomas P.; Kuo, Cheng-Yu; Lauer, Tod R.; Lee, Sang-Sung; Levis, Aviad; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Lindahl, Greg; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; Lu, Ru-Sen; MacDonald, Nicholas R.; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Martí-Vidal, Iván; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Müller, Cornelia; Musoke, Gibwa; Mejías, Alejandro Mus; Michalik, Daniel; Nadolski, Andrew; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Okino, Hiroki; Olivares, Héctor; Ortiz-León, Gisela N.; Oyama, Tomoaki; Özel, Feryal; Palumbo, Daniel C. M.; Park, Jongho; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Piétu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Pötzl, Felix M.; Prather, Ben; Preciado-López, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L. J.; Sánchez, Salvador; Sánchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, André; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhao, Shan-Shan; Event Horizon Telescope Collaboration.-- This is an open access article, original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI., In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observations revealed a compact asymmetric ring-like source morphology. This structure originates from synchrotron emission produced by relativistic plasma located in the immediate vicinity of the black hole. Here we present the corresponding linear-polarimetric EHT images of the center of M87. We find that only a part of the ring is significantly polarized. The resolved fractional linear polarization has a maximum located in the southwest part of the ring, where it rises to the level of ∼15%. The polarization position angles are arranged in a nearly azimuthal pattern. We perform quantitative measurements of relevant polarimetric properties of the compact emission and find evidence for the temporal evolution of the polarized source structure over one week of EHT observations. The details of the polarimetric data reduction and calibration methodology are provided. We carry out the data analysis using multiple independent imaging and modeling techniques, each of which is validated against a suite of synthetic data sets. The gross polarimetric structure and its apparent evolution with time are insensitive to the method used to reconstruct the image. These polarimetric images carry information about the structure of the magnetic fields responsible for the synchrotron emission. Their physical interpretation is discussed in an accompanying publication. © 2021. The Author(s). Published by the American Astronomical Society., The authors of the present Letter thank the following organizations and programs: the Academy of Finland (projects 274477, 284495, 312496, 315721); the Alexander von Humboldt Stiftung; Agencia Nacional de Investigacion y Desarrollo (ANID), Chile via NCN19_058 (TITANs), and Fondecyt 3190878; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the black hole Initiative at Harvard University, through a grant (60477) from the John Templeton Foundation; the China Scholarship Council; Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037-279006, F0003-281692, 104497, 275201, 263356); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Direccion General de Asuntos del Personal Academico-Universidad Nacional Autonoma de Mexico (DGAPA-UNAM, projects IN112417 and IN112820); the EACOA Fellowship of the East Asia Core Observatories Association; the European Research Council Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the Gordon and Betty Moore Foundation (grants GBMF-3561, GBMF-5278); the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829); the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSW-SLH057, QYZDJSSW-SYS008, ZDBS-LY-SLH011); the Leverhulme Trust Early Career Research Fellowship; the Max-PlanckGesellschaft (MPG); the Max Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP18K13594, JP18K03656, JP18H03721, 18K03709, 18H01245, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (105-2112-M-001025-MY3, 106-2112-M-001-011, 106-2119-M-001-027, 1072119-M-001-017, 107-2119-M-001-020, 107-2119-M-110-005, 108-2112-M-001-048, and 109-2124-M-001-005); the National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant 80NSSC20K1567 and 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, NASA NuSTAR award 80NSSC20K0645, NASA grant NNX17AL82G, and Hubble Fellowship grant HST-HF251431.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. , for NASA, under contract NAS5-26555); the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST0521233, AST-0705062, AST-0905844, AST-0922984, AST1126433, AST-1140030, DGE-1144085, AST-1207704, AST1207730, AST-1207752, MRI-1228509, OPP-1248097, AST1310896, AST-1337663, AST-1440254, AST-1555365, AST1615796, AST-1715061, AST-1716327, AST-1716536, OISE1743747, AST-1816420, AST-1903847, AST-1935980, AST2034306); the Natural Science Foundation of China (grants 11573051, 11633006, 11650110427, 10625314, 11721303, 11725312, 11933007, 11991052, 11991053); a fellowship of China Postdoctoral Science Foundation (2020M671266); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants 2014H1A2A1018695, NRF2015H1A2A1033752, 2015-R1D1A1A01056807, the Korea Research Fellowship Program: NRF-2015H1D3A1066561, Basic Research Support grant 2019R1F1A1059721); the Netherlands Organization for Scientific Research (NWO) VICI award (grant 639.043.513) and Spinoza Prize SPI 78-409; the New Scientific Frontiers with Precision Radio Interferometry Fellowship awarded by the South African Radio Astronomy Observatory (SARAO), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Innovation (DSI) of South Africa; the South African Research Chairs Initiative of the Department of Science and Innovation and National Research Foundation; the Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 2017-00648) the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Ciencia e Innovacion (grants PGC2018-098915-B-C21, AYA2016-80889-P; PID2019108995GB-C21, PGC2018-098915-B-C21); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709); the Toray Science Foundation; the Consejeria de Economia, Conocimiento, Empresas y Universidad of the Junta de Andalucia (grant P18-FR-1769), the Consejo Superior de Investigaciones Cientificas (grant 2019AEP112); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000001); the European Union's Horizon 2020 research and innovation program under grant agreement No 730562 RadioNet; ALMA North America Development Fund; the Academia Sinica; Chandra TM6-17006X; Chandra award DD7-18089X. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI1743442. XSEDE Stampede2 resource at TACC was allocated through TG-AST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. The simulations were performed in part on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, and on the HazelHen cluster at the HLRS in Stuttgart. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).We thank the staff at the participating observatories, correlation centers, and institutions for their enthusiastic support. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2016.1.01154.V. ALMA is a partnership of the European Southern Observatory (ESO; Europe, representing its member states), NSF, and National Institutes of Natural Sciences of Japan, together with National Research Council (Canada), Ministry of Science and Technology (MOST; Taiwan), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA; Taiwan), and Korea Astronomy and Space Science Institute (KASI; Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, Associated Universities, Inc. (AUI)/NRAO, and the National Astronomical Observatory of Japan (NAOJ). The NRAO is a facility of the NSF operated under cooperative agreement by AUI. This paper has made use of the following APEX data: Project ID T-091.F-0006-2013. APEX is a collaboration between the Max-Planck-Institut fur Radioastronomie (Germany), ESO, and the Onsala Space Observatory (Sweden). The SMA is a joint project between the SAO and ASIAA and is funded by the Smithsonian Institution and the Academia Sinica. The JCMT is operated by the East Asian Observatory on behalf of the NAOJ, ASIAA, and KASI, as well as the Ministry of Finance of China, Chinese Academy of Sciences, and the National Key R&D Program (No. 2017YFA0402700) of China. Additional funding support for the JCMT is provided by the Science and Technologies Facility Council (UK) and participating universities in the UK and Canada. The LMT is a project operated by the Instituto Nacional de Astrofisica, Optica, y Electronica (Mexico) and the University of Massachusetts at Amherst (USA), with financial support from the Consejo Nacional de Ciencia y Tecnologia and the National Science Foundation. The IRAM 30-m telescope on Pico Veleta, Spain is operated by IRAM and supported by CNRS (Centre National de la Recherche Scientifique, France), MPG (MaxPlanck-Gesellschaft, Germany) and IGN (Instituto Geografico Nacional, Spain). The SMT is operated by the Arizona Radio Observatory, a part of the Steward Observatory of the University of Arizona, with financial support of operations from the State of Arizona and financial support for instrumentation development from the NSF. The SPT is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-1125897 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation and the Gordon and Betty Moore Foundation grant GBMF 947. The SPT hydrogen maser was provided on loan from the GLT, courtesy of ASIAA. The EHTC has received generous donations of FPGA chips from Xilinx Inc., under the Xilinx University Program. The EHTC has benefited from technology shared under open-source license by the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER). The EHT project is grateful to T4Science and Microsemi for their assistance with Hydrogen Masers. This research has made use of NASA's Astrophysics Data System. We gratefully acknowledge the support provided by the extended staff of the ALMA, both from the inception of the ALMA Phasing Project through the observational campaigns of 2017 and 2018. We would like to thank A. Deller and W. Brisken for EHT-specific support with the use of DiFX. We acknowledge the significance that Maunakea, where the SMA and JCMT EHT stations are located, has for the indigenous Hawaiian people.
Published: 2021

245. First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon

Author: Masanori Nakamura, Michael Janssen, Carsten Kramer, Mark Gurwell, Alejandro Cruz-Osorio, Ivan Marti-Vidal, Hung Yi Pu, John F. C. Wardle, Jan Wagner, Tomoaki Oyama, Motoki Kino, Tyler Trent, Aleksandar Popstefanija, Wen Ping Lo, Geoffrey C. Bower, Michael Kramer, Helge Rottmann, Ralph Eatough, Bart Ripperda, Dominique Broguiere, Oliver Porth, Laurent Loinard, Satoki Matsushita, Hope Boyce, Antonio Fuentes, Jordy Davelaar, John E. Barrett, Ed Fomalont, Taehyun Jung, Michael H. Hecht, Peter Galison, Arturo I. Gómez-Ruiz, Dimitrios Psaltis, Daniel P. Marrone, Michael Titus, Freek Roelofs, Kazi L.J. Rygl, Jorge A. Preciado-López, Sera Markoff, Angelo Ricarte, Thomas P. Krichbaum, David Ball, Ue-Li Pen, Yosuke Mizuno, Chunchong Ni, Feryal zel, Charles F. Gammie, Richard Anantua, Roberto Garcia, Dominic W. Pesce, Daniel R. van Rossum, Sara Issaoun, Norbert Wex, Lei Huang, Sascha Trippe, Huib Jan van Langevelde, Jae-Young Kim, Olivier Gentaz, A. Jiménez-Rosales, Richard Plambeck, Lynn D. Matthews, Avery E. Broderick, Thomas Bronzwaer, Kazunori Akiyama, Elisabetta Liuzzo, Nimesh A. Patel, Doosoo Yoon, Alan L. Roy, Maciek Wielgus, James M. Moran, Monika Moscibrodzka, Andrew Chael, Geoffrey B. Crew, David J. James, H. Alyson Ford, Heino Falcke, Bradford Benson, David Sánchez-Arguelles, Keiichi Asada, Walter Alef, Jongho Park, Izumi Mizuno, Raquel Fraga-Encinas, Mark G. Rawlings, Alexandra J. Tetarenko, Vincent L. Fish, Des Small, Alan P. Marscher, Shan Shan Zhao, Dan Bintley, Ziri Younsi, Wu Jiang, Hector Olivares, Ciriaco Goddi, Nicholas R. MacDonald, André Young, Andrew Nadolski, Gisela N. Ortiz-León, George N. Wong, Jirong Mao, S. Sánchez, Ilje Cho, Efthalia Traianou, Dong-Jin Kim, Paul Tiede, Daniel Michalik, Colin J. Lonsdale, Vincent Piétu, Karl M. Menten, Mariafelicia De Laurentis, Kuo Liu, Pablo Torne, Lindy Blackburn, Yutaro Kofuji, Ilse van Bemmel, J. Neilsen, Kazuhiro Hada, John Conway, Aristeidis Noutsos, Katherine L. Bouman, Zachary Gelles, Sang-Sung Lee, Roman Gold, Alejandro Mus Mejías, Sheperd S. Doeleman, Svetlana G. Jorstad, Hiroki Okino, Robert Wharton, Eduardo Ros, Michael D. Johnson, J. Anton Zensus, Mansour Karami, José L. Gómez, Shiro Ikeda, Kenji Toma, Ken Young, Bong Won Sohn, Yuzhu Cui, Venkatessh Ramakrishnan, John E. Carlstrom, Juan-Carlos Algaba, Mark Kettenis, Chih-Wei Locutus Huang, Lijing Shao, Per Friberg, Remo P. J. Tilanus, Antxon Alberdi, Jessica Dempsey, Guang Yao Zhao, Christiaan D. Brinkerink, Lia Medeiros, C. Y. Kuo, Paul T. P. Ho, Derek Ward-Thompson, Arash Roshanineshat, Mel Rose, Yi Chen, Aviad Levis, Makoto Inoue, Nicola Marchili, Roger Brissenden, Boris Georgiev, Elizabeth Himwich, Yan-Rong Li, Tomohisa Kawashima, T. M. Crawford, Daryl Haggard, Ming-Tang Chen, Tuomas Savolainen, Neil M. Nagar, F. Peter Schloerb, Antonios Nathanail, Michael Bremer, Hiroshi Nagai, Andrei Lobanov, He Sun, M. Balokovic, Mahito Sasada, Raymond Blundell, Karl Friedrich Schuster, James M. Cordes, Minfeng Gu, Jonathan Weintroub, Shami Chatterjee, Ronald Hesper, Christian M. Fromm, Michael A. Nowak, Koushik Chatterjee, Ben Prather, Roger Deane, C. Müller, Feng Yuan, Ramesh Narayan, Ramesh Karuppusamy, Junhan Kim, Shoko Koyama, Paul M. Chesler, Zhi-Qiang Shen, Pierre Christian, Alan E. E. Rogers, Rebecca Azulay, Chi-kwan Chan, W. Boland, Ye-Fei Yuan, Garrett K. Keating, Gopal Narayanan, Mareki Honma, Alexander W. Raymond, Greg Lindahl, Gregory Desvignes, Anne Kathrin Baczko, Ramprasad Rao, Ru-Sen Lu, Buell T. Jannuzi, Tod R. Lauer, Joseph R. Farah, Patrick M. Koch, Zhiyuan Li, Britton Jeter, Rocco Lico, Chet Ruszczyk, Silke Britzen, Felix M. Pötzl, Jun Yi Koay, Gibwa Musoke, Kotaro Moriyama, Jason Dexter, Do-Young Byun, David H. Hughes, Roberto Neri, Jun Liu, Luis C. Ho, Luciano Rezzolla, Jongsoo Kim, Iniyan Natarajan, Daniel C. M. Palumbo, Qingwen Wu, Michael Lindqvist, Jason SooHoo, Fumie Tazaki, Anne Lähteenmäki Group, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Akiyama, Kazunori, Algaba, Juan Carlo, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E., Broguiere, Dominique, Bronzwaer, Thoma, Byun, Do-Young, Carlstrom, John E., Chael, Andrew, Chan, Chi-kwan, Chatterjee, Shami, Chatterjee, Koushik, Chen, Ming-Tang, Chen, Yongjun, Chesler, Paul M., Cho, Ilje, Christian, Pierre, Conway, John E., Cordes, James M., Crawford, Thomas M., Crew, Geoffrey B., Cruz-Osorio, Alejandro, Cui, Yuzhu, Davelaar, Jordy, De Laurentis, Mariafelicia, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Dexter, Jason, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Farah, Joseph, Fish, Vincent L., Fomalont, Ed, Ford, H. Alyson, Fraga-Encinas, Raquel, Friberg, Per, Fromm, Christian M., Fuentes, Antonio, Galison, Peter, Gammie, Charles F., García, Roberto, Gelles, Zachary, Gentaz, Olivier, Georgiev, Bori, Goddi, Ciriaco, Gold, Roman, Gómez, José L., Gómez-Ruiz, Arturo I., Gu, Minfeng, Gurwell, Mark, Hada, Kazuhiro, Haggard, Daryl, Hecht, Michael H., Hesper, Ronald, Himwich, Elizabeth, Ho, Luis C., Ho, Paul, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Ikeda, Shiro, Inoue, Makoto, Issaoun, Sara, James, David J., Jannuzi, Buell T., Janssen, Michael, Jeter, Britton, Jiang, Wu, Jimenez-Rosales, Alejandra, Johnson, Michael D., Jorstad, Svetlana, Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kawashima, Tomohisa, Keating, Garrett K., Kettenis, Mark, Kim, Dong-Jin, Kim, Jae-Young, Kim, Jongsoo, Kim, Junhan, Kino, Motoki, Koay, Jun Yi, Kofuji, Yutaro, Koch, Patrick M., Koyama, Shoko, Kramer, Michael, Kramer, Carsten, Krichbaum, Thomas P., Kuo, Cheng-Yu, Lauer, Tod R., Lee, Sang-Sung, Levis, Aviad, Li, Yan-Rong, Li, Zhiyuan, Lindqvist, Michael, Lico, Rocco, Lindahl, Greg, Liu, Jun, Liu, Kuo, Liuzzo, Elisabetta, Lo, Wen-Ping, Lobanov, Andrei P., Loinard, Laurent, Lonsdale, Colin, Lu, Ru-Sen, Macdonald, Nicholas R., Mao, Jirong, Marchili, Nicola, Markoff, Sera, Marrone, Daniel P., Marscher, Alan P., Martí-Vidal, Iván, Matsushita, Satoki, Matthews, Lynn D., Medeiros, Lia, Menten, Karl M., Mizuno, Izumi, Mizuno, Yosuke, Moran, James M., Moriyama, Kotaro, Moscibrodzka, Monika, Müller, Cornelia, Musoke, Gibwa, Mejías, Alejandro Mu, Michalik, Daniel, Nadolski, Andrew, Nagai, Hiroshi, Nagar, Neil M., Nakamura, Masanori, Narayan, Ramesh, Narayanan, Gopal, Natarajan, Iniyan, Nathanail, Antonio, Neilsen, Joey, Neri, Roberto, Ni, Chunchong, Noutsos, Aristeidi, Nowak, Michael A., Okino, Hiroki, Olivares, Héctor, Ortiz-León, Gisela N., Oyama, Tomoaki, Özel, Feryal, Palumbo, Daniel C. M., Park, Jongho, Patel, Nimesh, Pen, Ue-Li, Pesce, Dominic W., Piétu, Vincent, Plambeck, Richard, Popstefanija, Aleksandar, Porth, Oliver, Pötzl, Felix M., Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrio, Pu, Hung-Yi, Ramakrishnan, Venkatessh, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ricarte, Angelo, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Ros, Eduardo, Rose, Mel, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruszczyk, Chet, Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Sasada, Mahito, Savolainen, Tuoma, Schloerb, F. Peter, Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, De, Sohn, Bong Won, Soohoo, Jason, Sun, He, Tazaki, Fumie, Tetarenko, Alexandra J., Tiede, Paul, Tilanus, Remo P. J., Titus, Michael, Toma, Kenji, Torne, Pablo, Trent, Tyler, Traianou, Efthalia, Trippe, Sascha, Bemmel, Ilse van, van Langevelde, Huib Jan, van Rossum, Daniel R., Wagner, Jan, Ward-Thompson, Derek, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wielgus, Maciek, Wong, George N., Wu, Qingwen, Yoon, Doosoo, Young, André, Young, Ken, Younsi, Ziri, Yuan, Feng, Yuan, Ye-Fei, Zensus, J. Anton, Zhao, Guang-Yao, Zhao, Shan-Shan, Academy of Finland, European Commission, Agencia Nacional de Investigación y Desarrollo (Chile), Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Harvard University, Consejo Nacional de Ciencia y Tecnología (México), Universidad Nacional Autónoma de México, European Research Council, Generalitat Valenciana, Ministerio de Ciencia e Innovación (España), Gordon and Betty Moore Foundation, Japan Society for the Promotion of Science, Chinese Academy of Sciences, Ministry of Education, Culture, Sports, Science and Technology (Japan), MIT International Science and Technology Initiatives, Ministry of Science and Technology (Taiwan), National Aeronautics and Space Administration (US), National Key Research and Development Program (China), National Science Foundation (US), National Natural Science Foundation of China, China Postdoctoral Science Foundation, National Research Foundation of Korea, Netherlands Organization for Scientific Research, Spinoza Prize, Swedish Research Council, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Junta de Andalucía, Consejo Superior de Investigaciones Científicas (España), Department of Energy (US), Astronomy, and High Energy Astrophys. & Astropart. Phys (API, FNWI)
Subjects: Accretion, Kino, Astrophysics - astrophysics of galaxies, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, F500, 01 natural sciences, 7. Clean energy, Astrophysics - high energy astrophysical phenomena, Magnetohydrodynamics, Relativistic jets, 14, 162, 479, 870, 886, 994, 1964, 1261, 1278, 1335, 1347, 1390, 0103 physical sciences, Jets, Polarimetry, Radiative transfer, Plasma astrophysics, Radio jets, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Event horizons, 010308 nuclear & particles physics, Black holes, Chatterjee, Astronomy and Astrophysics, Creative commons, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Magnetic fields, Kerr black holes, %22">Fish , Relativistic jets, Humanities
Abstract: Full list of authors: Akiyama, Kazunori; Algaba, Juan Carlos; Alberdi, Antxon; Alef, Walter; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Baloković, Mislav; Barrett, John; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; García, Roberto; Gelles, Zachary; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gold, Roman; Gómez, José L.; Gómez-Ruiz, Arturo I.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Hecht, Michael H.; Hesper, Ronald; Himwich, Elizabeth; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Krichbaum, Thomas P.; Kuo, Cheng-Yu; Lauer, Tod R.; Lee, Sang-Sung; Levis, Aviad; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Lindahl, Greg; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; Lu, Ru-Sen; MacDonald, Nicholas R.; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Martí-Vidal, Iván; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Müller, Cornelia; Musoke, Gibwa; Mus Mejías, Alejandro; Michalik, Daniel; Nadolski, Andrew; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Neilsen, Joey; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Nowak, Michael A.; Okino, Hiroki; Olivares, Héctor; Ortiz-León, Gisela N.; Oyama, Tomoaki; Özel, Feryal; Palumbo, Daniel C. M.; Park, Jongho; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Piétu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Pötzl, Felix M.; Prather, Ben; Preciado-López, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L. J.; Sánchez, Salvador; Sánchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, André; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhao, Shan-Shan; Event Horizon Telescope Collaboration.-- This is an open access article, original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI., Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales. This polarized synchrotron radiation probes the structure of magnetic fields and the plasma properties near the black hole. Here we compare the resolved polarization structure observed by the EHT, along with simultaneous unresolved observations with the Atacama Large Millimeter/submillimeter Array, to expectations from theoretical models. The low fractional linear polarization in the resolved image suggests that the polarization is scrambled on scales smaller than the EHT beam, which we attribute to Faraday rotation internal to the emission region. We estimate the average density ne ~ 104–7 cm−3, magnetic field strength B ~ 1–30 G, and electron temperature Te ~ (1–12) × 1010 K of the radiating plasma in a simple one-zone emission model. We show that the net azimuthal linear polarization pattern may result from organized, poloidal magnetic fields in the emission region. In a quantitative comparison with a large library of simulated polarimetric images from general relativistic magnetohydrodynamic (GRMHD) simulations, we identify a subset of physical models that can explain critical features of the polarimetric EHT observations while producing a relativistic jet of sufficient power. The consistent GRMHD models are all of magnetically arrested accretion disks, where near-horizon magnetic fields are dynamically important. We use the models to infer a mass accretion rate onto the black hole in M87 of (3–20) × 10−4 M⊙ yr−1. © 2021. The Author(s). Published by the American Astronomical Society., The authors of the present Letter thank the following organizations and programs: the Academy of Finland (projects 274477, 284495, 312496, 315721); Agencia Nacional de Investigacion y Desarrollo (ANID), Chile via NCN19_058 (TITANs), and Fondecyt 3190878; the Alexander von Humboldt Stiftung; an Alfred P. Sloan Research Fellowship; Allegro, the European ALMA Regional Centre node in the Netherlands, the NL astronomy research network NOVA and the astronomy institutes of the University of Amsterdam, Leiden University and Radboud University; the black hole Initiative at Harvard University, through a grant (60477) from the John Templeton Foundation; the China Scholarship Council; Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico, projects U0004-246083, U0004-259839, F0003-272050, M0037-279006, F0003-281692, 104497, 275201, 263356, 57265507); the Delaney Family via the Delaney Family John A. Wheeler Chair at Perimeter Institute; Direccion General de Asuntos del Personal Academico-Universidad Nacional Autonoma de Mexico (DGAPA-UNAM, projects IN112417 and IN112820); the EACOA Fellowship of the East Asia Core Observatories Association; the European Research Council Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant 610058); the Generalitat Valenciana postdoctoral grant APOSTD/2018/177 and GenT Program (project CIDEGENT/2018/021); MICINN Research Project PID2019-108995GB-C22; the Gordon and Betty Moore Foundation (grants GBMF-3561, GBMF-5278); the Istituto Nazionale di Fisica Nucleare (INFN) sezione di Napoli, iniziative specifiche TEONGRAV; the International Max Planck Research School for Astronomy and Astrophysics at the Universities of Bonn and Cologne; Joint Princeton/Flatiron and Joint Columbia/Flatiron Postdoctoral Fellowships, research at the Flatiron Institute is supported by the Simons Foundation; the Japanese Government (Monbukagakusho: MEXT) Scholarship; the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for JSPS Research Fellowship (JP17J08829); the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS, grants QYZDJ-SSW-SLH057, QYZDJSSW-SYS008, ZDBS-LY-SLH011). We further thank the Leverhulme Trust Early Career Research Fellowship; the Max-Planck-Gesellschaft (MPG); theMax Planck Partner Group of the MPG and the CAS; the MEXT/JSPS KAKENHI (grants 18KK0090, JP18K13594, JP18K03656, JP18H03721, 18K03709, 18H01245, JP19H01943, 25120007); the Malaysian Fundamental Research Grant Scheme (FRGS) FRGS/1/2019/STG02/UM/02/6; the MIT International Science and Technology Initiatives (MISTI) Funds; the Ministry of Science and Technology (MOST) of Taiwan (105-2112-M001-025-MY3, 106-2112-M-001-011, 106-2119-M-001-027, 107-2119-M-001-017, 107-2119-M-001-020, 107-2119-M-110005, 108-2112-M-001-048, and 109-2124-M-001-005); the National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant 80NSSC20K1567, NASA Astrophysics Theory Program grant 80NSSC20K0527, NASA grant NNX17AL82G, Hubble Fellowship grant HST-HF2-51431.001A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555, and NASA NuSTAR award 80NSSC20K0645); the National Institute of Natural Sciences (NINS) of Japan; the National Key Research and Development Program of China (grant 2016YFA0400704, 2016YFA0400702); the National Science Foundation (NSF, grants AST-0096454, AST-0352953, AST-0521233, AST-0705062, AST-0905844, AST-0922984, AST-1126433, AST-1140030, DGE-1144085, AST-1207704, AST-1207730, AST-1207752, MRI-1228509, OPP-1248097, AST-1310896, AST-1337663, AST-1440254, AST-1555365, AST-1615796, AST-1715061, AST-1716327, AST-1716536, OISE-1743747, AST-1816420, AST-1903847, AST-1935980, AST-2034306); the Natural Science Foundation of China (grants 11573051, 11633006, 11650110427, 10625314, 11721303, 11725312, 11933007, 11991052, 11991053); a fellowship of China Postdoctoral Science Foundation (2020M671266); the Natural Sciences and Engineering Research Council of Canada (NSERC, including a Discovery Grant and the NSERC Alexander Graham Bell Canada Graduate Scholarships-Doctoral Program); the National Research Foundation of Korea (the Global PhD Fellowship Grant: grants 2014H1A2A1018695, NRF-2015H1A2A1033752, 2015-R1D1A1A01056807, the Korea Research Fellowship Program: NRF-2015H1D3A1066 561, Basic Research Support Grant 2019R1F1A1059721); the Netherlands Organization for Scientific Research (NWO) VICI award (grant 639.043. 513) and Spinoza Prize SPI 78-409; the New Scientific Frontiers with Precision Radio Interferometry Fellowship awarded by the South African Radio Astronomy Observatory (SARAO), which is a facility of the National Research Foundation (NRF), an agency of the Department of Science and Innovation (DSI) of South Africa; the South African Research Chairs Initiative of the Department of Science and Innovation and National Research Foundation; the Onsala Space Observatory (OSO) national infrastructure, for the provisioning of its facilities/observational support (OSO receives funding through the Swedish Research Council under grant 2017-00648) the Perimeter Institute for Theoretical Physics (research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development and by the Province of Ontario through the Ministry of Research, Innovation and Science); the Spanish Ministerio de Economia y Competitividad (grants PGC2018098915-B-C21, AYA2016-80889-P, PID2019-108995GB-C21); the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709); the Toray Science Foundation; the Consejeria de Economia, Conocimiento, Empresas y Universidad of the Junta de Andalucia (grant P18FR-1769), the Consejo Superior de Investigaciones Cientificas (grant 2019AEP112); the US Department of Energy (USDOE) through the Los Alamos National Laboratory (operated by Triad National Security, LLC, for the National Nuclear Security Administration of the USDOE (Contract 89233218CNA000 001); the European Union's Horizon 2020 research and innovation program under grant agreement No 730562 RadioNet; ALMA North America Development Fund; the Academia Sinica; Chandra TM6-17006X and DD7-18089X; the GenT Program (Generalitat Valenciana) Project CIDEGENT/2018/021. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), supported by NSF grant ACI-1548562, and CyVerse, supported by NSF grants DBI-0735191, DBI-1265383, and DBI-1743442. XSEDE Stampede2 resource at TACC was allocated through TGAST170024 and TG-AST080026N. XSEDE JetStream resource at PTI and TACC was allocated through AST170028. The simulations were performed in part on the SuperMUC cluster at the LRZ in Garching, on the LOEWE cluster in CSC in Frankfurt, and on the HazelHen cluster at the HLRS in Stuttgart. This research was enabled in part by support provided by Compute Ontario (http://computeontario.ca), Calcul Quebec (http://www.calculquebec.ca) and Compute Canada (http://www.computecanada.ca).We thank the staff at the participating observatories, correlation centers, and institutions for their enthusiastic support. This Letter makes use of the following ALMA data: ADS/JAO. ALMA#2016.1.01154.V. ALMA is a partnership of the European Southern Observatory (ESO; Europe, representing its member states), NSF, and National Institutes of Natural Sciences of Japan, together with National Research Council (Canada), Ministry of Science and Technology (MOST; Taiwan), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA; Taiwan), and Korea Astronomy and Space Science Institute (KASI; Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, Associated Universities, Inc. (AUI)/NRAO, and the National Astronomical Observatory of Japan (NAOJ). The NRAO is a facility of the NSF operated under cooperative agreement by AUI. This paper has made use of the following APEX data: Project ID T-091.F-0006-2013. APEX is a collaboration between the Max-Planck-Institut fur Radioastronomie (Germany), ESO, and the Onsala Space Observatory (Sweden). The SMA is a joint project between the SAO and ASIAA and is funded by the Smithsonian Institution and the Academia Sinica. The JCMT is operated by the East Asian Observatory on behalf of the NAOJ, ASIAA, and KASI, as well as the Ministry of Finance of China, Chinese Academy of Sciences, and the National Key R&D Program (No. 2017YFA0402700) of China. Additional funding support for the JCMT is provided by the Science and Technologies Facility Council (UK) and participating universities in the UK and Canada. The LMT is a project operated by the Instituto Nacional de Astrofisica, Optica, y Electronica (Mexico) and the University of Massachusetts at Amherst (USA), with financial support from the Consejo Nacional de Ciencia y Tecnologia and the National Science Foundation. The IRAM30-mtelescope on Pico Veleta, Spain is operated by IRAM and supported by CNRS (Centre National de la Recherche Scientifique, France), MPG (Max-Planck-Gesellschaft, Germany) and IGN (Instituto Geografico Nacional, Spain). The SMT is operated by the Arizona Radio Observatory, a part of the Steward Observatory of the University of Arizona, with financial support of operations from the State of Arizona and financial support for instrumentation development from the NSF. The SPT is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-1125897 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation and the Gordon and Betty Moore Foundation grant GBMF 947. The SPT hydrogen maser was provided on loan from the GLT, courtesy of ASIAA. The EHTC has received generous donations of FPGA chips from Xilinx Inc., under the Xilinx University Program. The EHTC has benefited from technology shared under open-source license by the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER). The EHT project is grateful to T4Science and Microsemi for their assistance with Hydrogen Masers. This research has made use of NASA's Astrophysics Data System. We gratefully acknowledge the support provided by the extended staff of the ALMA, both from the inception of the ALMA Phasing Project through the observational campaigns of 2017 and 2018. We would like to thank A. Deller and W. Brisken for EHT-specific support with the use of DiFX. We acknowledge the significance that Maunakea, where the SMA and JCMT EHT stations are located, has for the indigenous Hawaiian people.
Published: 2021

246. First M87 Event Horizon Telescope Results and the Role of ALMA

Author: Ciriaco Goddi, Geoff Crew, Violette Impellizzeri, Iván Martí-Vidal, Lynn D. Matthews, Hugo Messias, Helge Rottmann, Walter Alef, Lindy Blackburn, Thomas Bronzwaer, Chi-Kwan Chan, Jordy Davelaar, Roger Deane, Jason Dexter, Shep Doeleman, Heino Falcke, Vincent L. Fish, Raquel Fraga-Encinas, Christian M. Fromm, Ruben Herrero-Illana, Sara Issaoun, David James, Michael Janssen, Michael Kramer, Thomas P. Krichbaum, Mariafelicia De Laurentis, Elisabetta Liuzzo, Yosuke Mizuno, Monika Moscibrodzka, Iniyan Natarajan, Oliver Porth, Luciano Rezzolla, Kazi Rygl, Freek Roelofs, Eduardo Ros, Alan L. Roy, Lijing Shao, Huib Jan Van Langevelde, Ilse Van Bemmel, Remo Tilanus, Pablo Torne, Maciek Wielgus, Ziri Younsi, J. Anton Zensus, The Event Horizon Telescope Collaboration, Goddi, Ciriaco, Crew, Geoff, Impellizzeri, Violette, Martí-Vidal, Iván, Matthews, Lynn D., Messias, Hugo, Rottmann, Helge, Alef, Walter, Blackburn, Lindy, Bronzwaer, Thoma, Chan, Chi-Kwan, Davelaar, Jordy, Deane, Roger, Dexter, Jason, Doeleman, Shep, Falcke, Heino, Fish, Vincent L., Fraga-Encinas, Raquel, Fromm, Christian M., Herrero-Illana, Ruben, Issaoun, Sara, James, David, Janssen, Michael, Kramer, Michael, Krichbaum, Thomas P., DE LAURENTIS, Mariafelicia, Liuzzo, Elisabetta, Mizuno, Yosuke, Moscibrodzka, Monika, Natarajan, Iniyan, Porth, Oliver, Rezzolla, Luciano, Rygl, Kazi, Roelofs, Freek, Ros, Eduardo, Roy, Alan L., Shao, Lijing, Jan Van Langevelde, Huib, Van Bemmel, Ilse, Tilanus, Remo, Torne, Pablo, Wielgus, Maciek, Younsi, Ziri, Anton Zensus, J., and Event Horizon Telescope Collaboration, The
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: In April 2019, the Event Horizon Telescope (EHT) collaboration revealed the first image of the candidate super- massive black hole (SMBH) at the centre of the giant elliptical galaxy Messier 87 (M87). This event-horizon-scale image shows a ring of glowing plasma with a dark patch at the centre, which is interpreted as the shadow of the black hole. This breakthrough result, which represents a powerful confirmation of Einstein’s theory of gravity, or general relativity, was made possible by assembling a global network of radio telescopes operating at millimetre wavelengths that for the first time included the Atacama Large Millimeter/submillimeter Array (ALMA). The addition of ALMA as an anchor station has enabled a giant leap forward by increasing the sensitivity limits of the EHT by an order of magnitude, effectively turning it into an imaging array. The published image demonstrates that it is now possible to directly study the event horizon shadows of SMBHs via electromagnetic radiation, thereby transforming this elusive frontier from a mathematical concept into an astrophysical reality. The expansion of the array over the next few years will include new stations on different continents — and eventually satellites in space. This will provide progressively sharper and higher-fidelity images of SMBH candidates, and potentially even movies of the hot plasma orbiting around SMBHs. These improvements will shed light on the processes of black hole accretion and jet formation on event-horizon scales, thereby enabling more precise tests of general relativity in the truly strong field regime.
Published: 2019

247. Calibration of the LIGO gravitational wave detectors in the fifth science run

Author: M. Born, K. Mailand, R. Mittleman, Nelson Christensen, M. Cavagli, G. McIntyre, M. A. Arain, Gregory M. Harry, M. Aronsson, V. Predoi, I. W. Martin, Virginio Sannibale, David E. McClelland, C. Messenger, Laura Cadonati, Susan M. Scott, Teviet Creighton, Chad Hanna, C. Wilkinson, A. Rdiger, Ewan S. Douglas, J. Dueck, D. Friedrich, D. J. White, C. Zhao, C. Aulbert, Jonah Kanner, I. Leonor, John K. Cannizzo, Benno Willke, B. Moe, A. Stroeer, S. Kandhasamy, Kenneth A. Strain, P. Raffai, B. O'Reilly, M. Pickenpack, J. Hanks, V. V. Frolov, J. C. Dumas, Albert Lazzarini, C. I. Torrie, A. L. Stuver, E. J. Daw, K. D. Giardina, Z. Frei, Yi Pan, D. Barker, Peter Aufmuth, C. Gill, Fumiko Kawazoe, A. Singer, Soma Mukherjee, T. Krause, Stanislav Babak, D. R. Ingram, Evan Ochsner, Phil Willems, S. Penn, A. J. Weinstein, Drew Keppel, I. Gholami, P. T. Beyersdorf, M. V. van der Sluys, M. C. Araya, Alessandra Buonanno, Carlos Cepeda, Robert J. McCarthy, S. Mrka, P. Wei, Linqing Wen, J. N. Marx, C. Rver, Duncan A. Brown, S. Roddy, Shuichi Sato, J. Cain, M. Sakosky, Soumya D. Mohanty, M. Landry, Stefan Hild, J. Kullman, I. Di Palma, D. Lodhia, N. A. Robertson, P. Baker, Yasushi Mino, Joseph D. Romano, D. Hammer, J. Heefner, R. Grosso, Kasem Mossavi, N. Zotov, K. Mason, Sanjeev Dhurandhar, G. Gonzlez, John A. Clark, Ben Farr, M. Flanigan, J. H. Clayton, Chad Forrest, Z. Mrka, A. M. Sintes, Lee Samuel Finn, S. Grunewald, Amanda J. Page, A. Effler, S. R. P. Mohapatra, Peter Kalmus, E. Amador Ceron, R. M. Martin, Xavier Siemens, T. Etzel, D. J. Hosken, J. G. Rollins, Rana X. Adhikari, Gareth Jones, B. Machenschalk, F. Donovan, A. Grant, L. Zhang, Roman Schnabel, J. E. Brau, A. A. van Veggel, Subhasish Mitra, Efim A. Khazanov, J. Slutsky, Moritz Mehmet, Michele Vallisneri, J. Luan, H. Yamamoto, M. A. Barton, Kevin M. Ryan, Leo C. Stein, J. R. Leong, Sascha Husa, D.B. DeBra, A. Thring, A. Perreca, Imre Bartos, Guenakh Mitselmakher, R. L. Savage, T. 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Pareja, John Veitch, C. Titsler, M. MacInnis, R. S. Amin, J. Breyer, C. Gray, Kentaro Somiya, G. Santostasi, M. Britzger, K. Haughian, Kazuhiro Hayama, D. Talukder, C. Pankow, I. W. Harry, S. Wen, David H. Shoemaker, P. Lu, O. Burmeister, V. Kringel, S. Goßler, A. F. Brooks, Atsushi J. Nishizawa, Subramanian Krishnamurthy, Roberto Conte, Scott Koranda, L. Matone, I. Yakushin, L. Sammut, A. Sibley, D. Fazi, S. H. Huttner, D. Atkinson, Andrew Melatos, B. Schulz, C. D. Capano, S. E. Whitcomb, Francesco Salemi, Alexander Khalaidovski, B. Bland, Stephen Fairhurst, S. Sakata, Miquel Trias, A. Mullavey, Kazuhiro Yamamoto, Richard O'Shaughnessy, B. Barr, P. Patel, Malik Rakhmanov, J. Worden, L. Williams, E. Forsi, R. Riesen, Roland Schilling, S. P. Tarabrin, Richard J. Abbott, Lincoln Laboratory, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, LIGO (Observatory : Massachusetts Institute of Technology), Barnum, Sam, Barsotti, Lisa, Blackburn, Lindy, Bodiya, Timothy P., Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Brennan, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, B., Shoemaker, David H., Smith, Nicolas D., Stein, Andrew J., Stein, Leo C., Walden, Samuel J., Weiss, Rainer, Wipf, Christopher C., LVC Collaboration, The, Pinto, I. M., and Principe, M.
Subjects: Nuclear and High Energy Physics, Gravitational-wave observatory, Physics::Instrumentation and Detectors, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, Gravitational waves, Optics, Coincident, 0103 physical sciences, Calibration, Astronomical interferometer, Interferometer, 010303 astronomy & astrophysics, Instrumentation, QC, Physics, Control systems, 010308 nuclear & particles physics, business.industry, Gravitational wave, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, LIGO, Interferometry, business
Abstract: The Laser Interferometer Gravitational Wave Observatory (LIGO) is a network of three detectors built to detect local perturbations in the space–time metric from astrophysical sources. These detectors, two in Hanford, WA and one in Livingston, LA, are power-recycled Fabry-Perot Michelson interferometers. In their fifth science run (S5), between November 2005 and October 2007, these detectors accumulated one year of triple coincident data while operating at their designed sensitivity. In this paper, we describe the calibration of the instruments in the S5 data set, including measurement techniques and uncertainty estimation., United States. National Aeronautics and Space Administration, Carnegie Trust, Leverhulme Trust, David & Lucile Packard Foundation, Research Corporation, Alfred P. Sloan Foundation
Published: 2010

248. Search for Gravitational-Wave Inspiral Signals associated with Short Gamma-Ray Bursts during Ligo's Fifth and Virgo's First Science Run

Author: Abadie, J., Abbott, B. P., Abbott, R., Accadia, T., Acernese, F., Adhikari, R., Ajith, P., Allen, B., Allen, G., Ceron, E. A., Amin, R. S., Anderson, S. B., Anderson, W. G., Antonucci, F., Aoudia, S., Arain, M. A., Araya, M., Arun, K. G., Aso, Y., Aston, S., Astone, P., Aufmuth, P., Aulbert, C., Babak, S., Baker, P., Ballardin, G., Ballmer, S., Barker, D., Barone, F., Barr, B., Barriga, P., Barsotti, L., Barsuglia, M., Barton, M. A., Bartos, I., Bassiri, R., Bastarrika, M., Bauer, T. S., Behnke, B., Beker, M. G., Belletoile, A., Benacquista, M., Betzwieser, J., Beyersdorf, P. T., Bigotta, S., Bilenko, I. A., Billingsley, G., Birindelli, S., Biswas, R., Bizouard, M. A., Black, E., Blackburn, J. K., Blackburn, L., Blair, D., Bland, B., Blom, M., Boccara, C., Bock, O., Bodiya, T. P., Bondarescu, R., Bondu, F., Bonelli, L., Bonnand, R., Bork, R., Born, M., Bose, S., Bosi, L., Braccini, S., Bradaschia, C., Brady, P. R., Braginsky, V. B., Brau, J. E., Breyer, J., Bridges, D. O., Brillet, A., Brinkmann, M., Brisson, V., Britzger, M., Brooks, A. F., Brown, D. A., Budzynski, R., Bulik, T., Bullington, A., Bulten, H. J., Buonanno, A., Burguet-Castell, J., Burmeister, O., Buskulic, D., Buy, C., Byer, R. L., Cadonati, L., Cagnoli, G., Cain, J., Calloni, E., Camp, J. B., Campagna, E., Cannizzo, J., Cannon, K. C., Canuel, B., Cao, J., Capano, C. D., Carbognani, F., Cardenas, L., Caudill, S., Cavaglia, M., Cavalier, F., Cavalieri, R., Cella, G., Cepeda, C., Cesarini, E., Chalermsongsak, T., Chalkley, E., Charlton, P., Chassande-Mottin, E., Chatterji, S., Chelkowski, S., Chen, Y., Chincarini, A., Christensen, N., S. S. Y., C. T. Y., Clark, D., Clark, J., Clayton, J. H., Cleva, F., Coccia, E., Colacino, C. N., Colas, J., Colla, A., Colombini, M., Conte, R., Cook, D., T. R. C., Cornish, N., Corsi, A., Coulon, J. P., Coward, D., Coyne, D. C., J. D. E., Creighton, T. D., Cruise, A. M., Culter, R. M., Cumming, A., Cunningham, L., Cuoco, E., Dahl, K., Danilishin, S. L., Antonio, S. D., Danzmann, K., Dattilo, V., Daudert, B., Davier, M., Davies, G., Daw, E. J., Day, R., Dayanga, T., Rosa, R. D., Debra, D., Degallaix, J., Prete, M. D., Dergachev, V., Desalvo, R., Dhurandhar, S., Fiore, L. D., Lieto, A. D., Paolo, M. D., Virgilio, A. D., Diaz, M., Dietz, A., Donovan, F., Dooley, K. L., Doomes, E. E., Drago, M., R. W. P., Driggers, J., Dueck, J., Duke, I., Dumas, J. C., Edgar, M., Edwards, M., Effler, A., Ehrens, P., Etzel, T., Evans, M., Evans, T., Fafone, V., Fairhurst, S., Faltas, Y., Fan, Y., Fazi, D., Fehrmann, H., Ferrante, I., Fidecaro, F., Finn, L. S., Fiori, I., Flaminio, R., Flasch, K., Foley, S., Forrest, C., Fotopoulos, N., Fournier, J. D., Franc, J., Frasca, S., Frasconi, F., Frede, M., Frei, M., Frei, Z., Freise, A., Frey, R., Fricke, T. T., Friedrich, D., Fritschel, P., Frolov, V. V., Fulda, P., Fyffe, M., Galimberti, M., Gammaitoni, L., Garofoli, J. A., Garufi, F., Gemme, G., Genin, E., Gennai, A., Ghosh, S., Giaime, J. A., Giampanis, S., Giardina, K. D., Giazotto, A., Goetz, E., Goggin, L. M., Gonzalez, G., Gossler, S., Gouaty, R., Granata, M., Grant, A., Gras, S., Gray, C., R. J. S., Gretarsson, A. M., Greverie, C., Grosso, R., Grote, H., Grunewald, S., Guidi, G. M., Gustafson, E. K., Gustafson, R., Hage, B., Hallam, J. M., Hammer, D., Hammond, G. D., Hanna, C., Hanson, J., Harms, J., Harry, G. M., Harry, I. W., Harstad, E. D., Haughian, K., Hayama, K., Hayler, T., Heefner, J., Heitmann, H., Hello, P., Heng, I. S., Heptonstall, A., Hewitson, M., Hild, S., Hirose, E., Hoak, D., Hodge, K. A., Holt, K., Hosken, D. J., Hough, J., Howell, E., Hoyland, D., Huet, D., Hughey, B., Husa, S., Huttner, S. H., Ingram, D. R., Isogai, T., Ivanov, A., Jaranowski, P., Johnson, W. W., Jones, D. I., Jones, G., Jones, R., Ju, L., Kalmus, P., Kalogera, V., Kandhasamy, S., Kanner, J., Katsavounidis, E., Kawabe, K., Kawamura, S., Kawazoe, F., Kells, W., Keppel, D. G., Khalaidovski, A., Khalili, F. Y., Khan, R., Khazanov, E., Kim, H., King, P. J., Kissel, J. S., Klimenko, S., Kokeyama, K., Kondrashov, V., Kopparapu, R., Koranda, S., Kowalska, I., Kozak, D., Kringel, V., Krishnan, B., Krolak, A., Kuehn, G., Kullman, J., Kumar, R., Kwee, P., Lam, P. K., Landry, M., Lang, M., Lantz, B., Lastzka, N., Lazzarini, A., Leaci, P., Lei, M., Leindecker, N., Leonor, I., Leroy, N., Letendre, N., T. G. F., Lin, H., Lindquist, P. E., Littenberg, T. B., Lockerbie, N. A., Lodhia, D., Lorenzini, M., Loriette, V., Lormand, M., Losurdo, G., Lu, P., Lubinski, M., Lucianetti, A., Lueck, H., Lundgren, A., Machenschalk, B., Macinnis, M., Mageswaran, M., Mailand, K., Majorana, E., Mak, C., Maksimovic, I., Man, N., Mandel, I., Mandic, V., Mantovani, M., Marchesoni, F., Marion, F., Marka, S., Marka, Z., Markosyan, A., Markowitz, J., Maros, E., Marque, J., Martelli, F., Martin, I. W., Martin, R. M., Marx, J. N., Mason, K., Masserot, A., Matichard, F., Matone, L., Matzner, R. A., Mavalvala, N., Mccarthy, R., Mcclelland, D. E., Mcguire, S. C., Mcintyre, G., D. J. A., Mehmet, M., Melatos, A., Melissinos, A. C., Mendell, G., Menendez, D. F., Mercer, R. A., Merill, L., Meshkov, S., Messenger, C., Meyer, M. S., Miao, H., Michel, C., Milano, L., Miller, J., Minenkov, Y., Mino, Y., Mitra, S., Mitrofanov, V. P., Mitselmakher, G., Mittleman, R., Miyakawa, O., Moe, B., Mohan, M., Mohanty, S. D., S. R. P., Moreau, J., Moreno, G., Morgado, N., Morgia, A., Mors, K., Mosca, S., Moscatelli, V., Mossavi, K., Mours, B., Mowlowry, C., Mueller, G., Mukherjee, S., Mullavey, A., Mueller-Ebhardt, H., Munch, J., Murray, P. G., Nash, T., Nawrodt, R., Nelson, J., Neri, I., Newton, G., Nishida, E., Nishizawa, A., Nocera, F., Ochsner, E., J. O'Dell, Ogin, G. H., Oldenburg, R., Reilly, B. O., Shaughnessy, R. O., Ottaway, D. J., Ottens, R. S., Overmier, H., Owen, B. J., Page, A., Pagliaroli, G., Palomba, C., Pan, Y., Pankow, C., Paoletti, F., Papa, M. A., Pardi, S., Parisi, M., Pasqualetti, A., Passaquieti, R., Passuello, D., Patel, P., Pathak, D., Pedraza, M., Pekowsky, L., Penn, S., Peralta, C., Perreca, A., Persichetti, G., Pichot, M., Pickenpack, M., Piergiovanni, F., Pietka, M., Pinard, L., Pinto, I. M., Pitkin, M., Pletsch, H. J., Plissi, M. V., Poggiani, R., Postiglione, F., Prato, M., Predoi, V., Principe, M., Prix, R., Prodi, G. A., Prokhorov, L., Puncken, O., Punturo, M., Puppo, P., Quetschke, V., Raab, F. J., Rabeling, D. S., Radkins, H., Raffai, P., Raics, Z., Rakhmanov, M., Rapagnani, P., Raymond, V., Re, V., Reed, C. M., Reed, T., Regimbau, T., Rehbein, H., Reid, S., Reitze, D. H., Ricci, F., Riesen, R., Riles, K., Roberts, P., Robertson, N. A., Robinet, F., Robinson, C., Robinson, E. L., Rocchi, A., Roddy, S., Roever, C., Rolland, L., Rollins, J., Romano, J. D., Romano, R., Romie, J. H., Rosinska, D., Rowan, S., Ruediger, A., Ruggi, P., Ryan, K., Sakata, S., Salemi, F., Sammut, L., L. S. de, Sandberg, V., Sannibale, V., Santamaria, L., Santostasi, G., Saraf, S., Sarin, P., Sassolas, B., Sathyaprakash, B. S., Sato, S., Satterthwaite, M., Saulson, P. R., Savage, R., Schilling, R., Schnabel, R., Schofield, R., Schulz, B., Schutz, B. F., Schwinberg, P., Scott, J., Scott, S. M., Searle, A. C., Seifert, F., Sellers, D., Sengupta, A. S., Sentenac, D., Sergeev, A., Shapiro, B., Shawhan, P., Shoemaker, D. H., Sibley, A., Siemens, X., Sigg, D., Sintes, A. M., Skelton, G., B. J. J., Slutsky, J., Smith, J. R., Smith, M. R., Smith, N. D., Somiya, K., Sorazu, B., Stein, A. J., Stein, L. C., Steplewski, S., Stochino, A., Stone, R., Strain, K. A., Strigin, S., Stroeer, A., Sturani, R., Stuver, A. L., Summerscales, T. Z., Sung, M., Susmithan, S., Sutton, P. J., Swinkels, B., Szokoly, G. P., Talukder, D., Tanner, D. B., Tarabrin, S. P., Taylor, J. R., Taylor, R., Thorne, K. A., Thorne, K. S., Thuering, A., Titsler, C., Tokmakov, K. V., Toncelli, A., Tonelli, M., Torres, C., Torrie, C. I., Tournefier, E., Travasso, F., Traylor, G., Trias, M., Trummer, J., Turner, L., Ugolini, D., Urbanek, K., Vahlbruch, H., Vajente, G., Vallisneri, M., J. F. J., Den, C. V., S. v. der, M. V. van, Vass, S., Vaulin, R., Vavoulidis, M., Vecchio, A., Vedovato, G., A. A. van, Veitch, J., Veitch, P. J., Veltkamp, C., Verkindt, D., Vetrano, F., Vicere, A., Villar, A., Vinet, J. Y., Vocca, H., Vorvick, C., Vyachanin, S. P., Waldman, S. J., Wallace, L., Wanner, A., Ward, R. L., Was, M., Wei, P., Weinert, M., Weinstein, A. J., Weiss, R., Wen, L., Wen, S., Wessels, P., West, M., Westphal, T., Wette, K., Whelan, J. T., Whitcomb, S. E., Whiting, B. F., Wilkinson, C., Willems, P. A., Williams, H. R., Williams, L., Willke, B., Wilmut, I., Winkelmann, L., Winkler, W., Wipf, C. C., Wiseman, A. G., Woan, G., Wooley, R., Worden, J., Yakushin, I., Yamamoto, H., Yamamoto, K., Yeaton-Massey, D., Yoshida, S., Yu, P. P., Yvert, M., Zanolin, M., Zhang, L., Zhang, Z., Zhao, C., Zotov, N., Zucker, M. E., Zweizig, J., Collaboration, L. S., Collaboration, V., Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux (ARTEMIS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), APC - Gravitation (APC-Gravitation), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Virgo, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. School of Science, MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Cao, Jianshu, Corbitt, Thomas R., Donovan, Frederick J., Duke, I., Evans, Matthew J., Foley, S., Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Markowitz, Jared John, Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Calloni, Enrico, DE ROSA, Rosario, L., Di Fiore, Garufi, Fabio, Milano, Leopoldo, Mosca, Simona, Parisi, Maria, Pardi, Silvio, G., Persichetti, Pinto, Innocenzo, The LIGO Scientific Collaboration, The Virgo Collaboration, (Astro)-Particles Physics, Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), ESPCI ParisTech, Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Laboratoire d'Annecy de Physique des Particules ( LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux ( ARTEMIS ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de la Côte d'Azur, Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Physique Corpusculaire et Cosmologie - Collège de France ( PCC ), Collège de France ( CdF ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ) -Collège de France ( CdF ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ) -AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Centre National de la Recherche Scientifique ( CNRS ) -Observatoire de Paris-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Institut de Physique de Rennes ( IPR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire des matériaux avancés ( LMA ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), APC - Gravitation ( APC-Gravitation ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Max-Planck-Institut-Max-Planck-Institut, and Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astrophysics::High Energy Astrophysical Phenomena, gamma-ray burst: general, FOS: Physical sciences, onde gravitazionali, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Coincidence, General Relativity and Quantum Cosmology, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Neutron, 14. Life underwater, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, SUPERNOVA, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, binaries: close, COMPACT BINARIES, 010308 nuclear & particles physics, Gravitational wave, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], gamma-ray bursts, [ PHYS.ASTR.HE ] Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astronomy and Astrophysics, FLARE, GRB, SDG 10 - Reduced Inequalities, GRAVITATIONAL WAVES, LIGO, Black hole, Neutron star, gravitational waves, Space and Planetary Science, GRB-070201, interferometri, [ SDU.ASTR.HE ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astrophysics - High Energy Astrophysical Phenomena, Gamma-ray burst
Abstract: Progenitor scenarios for short gamma-ray bursts (short GRBs) include coalescenses of two neutron stars or a neutron star and black hole, which would necessarily be accompanied by the emission of strong gravitational waves. We present a search for these known gravitational-wave signatures in temporal and directional coincidence with 22 GRBs that had sufficient gravitational-wave data available in multiple instruments during LIGO's fifth science run, S5, and Virgo's first science run, VSR1. We find no statistically significant gravitational-wave candidates within a [ – 5, + 1) s window around the trigger time of any GRB. Using the Wilcoxon-Mann-Whitney U-test, we find no evidence for an excess of weak gravitational-wave signals in our sample of GRBs. We exclude neutron star-black hole progenitors to a median 90% confidence exclusion distance of 6.7 Mpc., Alfred P. Sloan Foundation, David & Lucile Packard Foundation, National Aeronautics and Space Administration, Carnegie Trust, Leverhulme Trust, Research Corporation
Published: 2010

249. FIRST SEARCH FOR GRAVITATIONAL WAVES FROM THE YOUNGEST KNOWN NEUTRON STAR

Author: LIGO Scientific Collaboration, Abadie, J., Abbott, B. P., Abbott, R., Abernathy, M., Adams, C., Adhikari, R., Ajith, P., Allen, B., Allen, G., Ceron, E. Amador, Amin, R. S., Anderson, S. B., Anderson, W. G., Arain, M. A., Araya, M., Aronsson, M., Aso, Y., Aston, S., Atkinson, D. E., Aufmuth, P., Aulbert, C., Babak, S., Baker, P., Ballmer, S., Barker, D., Barnum, S., Barr, B., Barriga, P., Barsotti, L., Barton, M. A., Bartos, I., Bassiri, R., Bastarrika, M., Bauchrowitz, J., Behnke, B., Benacquista, M., Bertolini, A., Betzwieser, J., Beveridge, N., Beyersdorf, P. T., Bilenko, I. A., Billingsley, G., Birch, J., Biswas, R., Black, E., Blackburn, J. K., Blackburn, L., Blair, D., Bland, B., Bock, O., Bodiya, T. P., Bondarescu, R., Bork, R., Born, M., Bose, S., Boyle, M., Brady, P. R., Braginsky, V. B., Brau, J. E., Breyer, J., Bridges, D. O., Brinkmann, M., Britzger, M., Brooks, A. F., Brown, D. A., Buonanno, A., Burguet--Castell, J., Burmeister, O., Byer, R. L., Cadonati, L., Camp, J. B., Campsie, P., Cannizzo, J., Cannon, K. C., Cao, J., Capano, C., Caride, S., Caudill, S., Cavaglià, M., Cepeda, C., Chalermsongsak, T., Chalkley, E., Charlton, P., Chelkowski, S., Chen, Y., Christensen, N., Chua, S. S. Y., Chung, C. T. Y., Clark, D., Clark, J., Clayton, J. H., Conte, R., Cook, D., Corbitt, T. R., Cornish, N., Costa, C. A., Coward, D., Coyne, D. C., Creighton, J. D. E., Creighton, T. D., Cruise, A. M., Culter, R. M., Cumming, A., Cunningham, L., Dahl, K., Danilishin, S. L., Dannenberg, R., Danzmann, K., Das, K., Daudert, B., Davies, G., Davis, A., Daw, E. J., Dayanga, T., DeBra, D., Degallaix, J., Dergachev, V., DeRosa, R., DeSalvo, R., Devanka, P., Dhurandhar, S., Di Palma, I., Díaz, M., Donovan, F., Dooley, K. L., Doomes, E. E., Dorsher, S., Douglas, E. S. D., Drever, R. W. P., Driggers, J. C., Dueck, J., Dumas, J. -C., Eberle, T., Edgar, M., Edwards, M., Effler, A., Ehrens, P., Engel, R., Etzel, T., Evans, M., Evans, T., Fairhurst, S., Fan, Y., Farr, B. F., Fazi, D., Fehrmann, H., Feldbaum, D., Finn, L. S., Flanigan, M., Flasch, K., Foley, S., Forrest, C., Forsi, E., Fotopoulos, N., Frede, M., Frei, M., Frei, Z., Freise, A., Frey, R., Fricke, T. T., Friedrich, D., Fritschel, P., Frolov, V. V., Fulda, P., Fyffe, M., Garofoli, J. A., Gholami, I., Ghosh, S., Giaime, J. A., Giampanis, S., Giardina, K. D., Gill, C., Goetz, E., Goggin, L. M., González, G., Gorodetsky, M. L., Goßler, S., Graef, C., Grant, A., Gras, S., Gray, C., Greenhalgh, R. J. S., Gretarsson, A. M., Grosso, R., Grote, H., Grunewald, S., Gustafson, E. K., Gustafson, R., Hage, B., Hall, P., Hallam, J. M., Hammer, D., Hammond, G., Hanks, J., Hanna, C., Hanson, J., Harms, J., Harry, G. M., Harry, I. W., Harstad, E. D., Haughian, K., Hayama, K., Heefner, J., Heng, I. S., Heptonstall, A., Hewitson, M., Hild, S., Hirose, E., Hoak, D., Hodge, K. A., Holt, K., Hosken, D. J., Hough, J., Howell, E., Hoyland, D., Hughey, B., Husa, S., Huttner, S. H., Huynh--Dinh, T., Ingram, D. R., Inta, R., Isogai, T., Ivanov, A., Johnson, W. W., Jones, D. I., Jones, G., Jones, R., Ju, L., Kalmus, P., Kalogera, V., Kandhasamy, S., Kanner, J., Katsavounidis, E., Kawabe, K., Kawamura, S., Kawazoe, F., Kells, W., Keppel, D. G., Khalaidovski, A., Khalili, F. Y., Khazanov, E. A., Kim, H., King, P. J., Kinzel, D. L., Kissel, J. S., Klimenko, S., Kondrashov, V., Kopparapu, R., Koranda, S., Kozak, D., Krause, T., Kringel, V., Krishnamurthy, S., Krishnan, B., Kuehn, G., Kullman, J., Kumar, R., Kwee, P., Landry, M., Lang, M., Lantz, B., Lastzka, N., Lazzarini, A., Leaci, P., Leong, J., Leonor, I., Li, J., Lin, H., Lindquist, P. E., Lockerbie, N. A., Lodhia, D., Lormand, M., Lu, P., Luan, J., Lubinski, M., Lucianetti, A., Lück, H., Lundgren, A., Machenschalk, B., MacInnis, M., Mageswaran, M., Mailand, K., Mak, C., Mandel, I., Mandic, V., Márka, S., Márka, Z., Maros, E., Martin, I. W., Martin, R. M., Marx, J. N., Mason, K., Matichard, F., Matone, L., Matzner, R. A., Mavalvala, N., McCarthy, R., McClelland, D. E., McGuire, S. C., McIntyre, G., McIvor, G., McKechan, D. J. A., Meadors, G., Mehmet, M., Meier, T., Melatos, A., Melissinos, A. C., Mendell, G., Menéndez, D. F., Mercer, R. A., Merill, L., Meshkov, S., Messenger, C., Meyer, M. S., Miao, H., Miller, J., Mino, Y., Mitra, S., Mitrofanov, V. P., Mitselmakher, G., Mittleman, R., Moe, B., Mohanty, S. D., Mohapatra, S. R. P., Moraru, D., Moreno, G., Morioka, T., Mors, K., Mossavi, K., MowLowry, C., Mueller, G., Mukherjee, S., Mullavey, A., Müller-Ebhardt, H., Munch, J., Murray, P. G., Nash, T., Nawrodt, R., Nelson, J., Newton, G., Nishizawa, A., Nolting, D., Ochsner, E., O'Dell, J., Ogin, G. H., Oldenburg, R. G., O'Reilly, B., O'Shaughnessy, R., Osthelder, C., Ottaway, D. J., Ottens, R. S., Overmier, H., Owen, B. J., Page, A., Pan, Y., Pankow, C., Papa, M. A., Pareja, M., Patel, P., Pedraza, M., Pekowsky, L., Penn, S., Peralta, C., Perreca, A., Pickenpack, M., Pinto, I. M., Pitkin, M., Pletsch, H. J., Plissi, M. V., Postiglione, F., Predoi, V., Price, L. R., Prijatelj, M., Principe, M., Prix, R., Prokhorov, L., Puncken, O., Quetschke, V., Raab, F. J., Radke, T., Radkins, H., Raffai, P., Rakhmanov, M., Rankins, B., Raymond, V., Reed, C. M., Reed, T., Reid, S., Reitze, D. H., Riesen, R., Riles, K., Roberts, P., Robertson, N. A., Robinson, C., Robinson, E. L., Roddy, S., Röver, C., Rollins, J., Romano, J. D., Romie, J. H., Rowan, S., Rüdiger, A., Ryan, K., Sakata, S., Sakosky, M., Salemi, F., Sammut, L., de la Jordana, L. Sancho, Sandberg, V., Sannibale, V., Santamaría, L., Santostasi, G., Saraf, S., Sathyaprakash, B. S., Sato, S., Satterthwaite, M., Saulson, P. R., Savage, R., Schilling, R., Schnabel, R., Schofield, R., Schulz, B., Schutz, B. F., Schwinberg, P., Scott, J., Scott, S. M., Searle, A. C., Seifert, F., Sellers, D., Sengupta, A. S., Sergeev, A., Shaddock, D., Shapiro, B., Shawhan, P., Shoemaker, D. H., Sibley, A., Siemens, X., Sigg, D., Singer, A., Sintes, A. M., Skelton, G., Slagmolen, B. J. J., Slutsky, J., Smith, J. R., Smith, M. R., Smith, N. D., Somiya, K., Sorazu, B., Speirits, F. C., Stein, A. J., Stein, L. C., Steinlechner, S., Steplewski, S., Stochino, A., Stone, R., Strain, K. A., Strigin, S., Stroeer, A., Stuver, A. L., Summerscales, T. Z., Sung, M., Susmithan, S., Sutton, P. J., Talukder, D., Tanner, D. B., Tarabrin, S. P., Taylor, J. R., Taylor, R., Thomas, P., Thorne, K. A., Thorne, K. S., Thrane, E., Thüring, A., Titsler, C., Tokmakov, K. V., Torres, C., Torrie, C. I., Traylor, G., Trias, M., Tseng, K., Ugolini, D., Urbanek, K., Vahlbruch, H., Vaishnav, B., Vallisneri, M., Broeck, C. Van Den, van der Sluys, M. V., van Veggel, A. A., Vass, S., Vaulin, R., Vecchio, A., Veitch, J., Veitch, P. J., Veltkamp, C., Villar, A., Vorvick, C., Vyachanin, S. P., Waldman, S. J., Wallace, L., Wanner, A., Ward, R. L., Wei, P., Weinert, M., Weinstein, A. J., Weiss, R., Wen, L., Wen, S., Wessels, P., West, M., Westphal, T., Wette, K., Whelan, J. T., Whitcomb, S. E., White, D. J., Whiting, B. F., Wilkinson, C., Willems, P. A., Williams, L., Willke, B., Winkelmann, L., Winkler, W., Wipf, C. C., Wiseman, A. G., Woan, G., Wooley, R., Worden, J., Yakushin, I., Yamamoto, H., Yamamoto, K., Yeaton-Massey, D., Yoshida, S., Yu, P. P., Zanolin, M., Zhang, L., Zhang, Z., Zhao, C., Zotov, N., Zucker, M. E., Zweizig, J., Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Physics, LIGO (Observatory : Massachusetts Institute of Technology), MIT Kavli Institute for Astrophysics and Space Research, Barsotti, Lisa, Blackburn, Lindy L., Bodiya, Timothy Paul, Corbitt, Thomas R., Donovan, Frederick J., Evans, Matthew J., Foley, Stephany, Fritschel, Peter K., Harry, Gregory, Hughey, Barbara, Katsavounidis, Erotokritos, MacInnis, Myron E., Mason, Kenneth R., Matichard, Fabrice, Mavalvala, Nergis, Mittleman, Richard K., Shapiro, Brett Noah, Shoemaker, David H., Smith, Nicolas de Mateo, Stein, Andrew J., Stein, Leo Chaim, Waldman, Samuel J., Weiss, Rainer, LVC Collaboration, The, Pinto, I. M., Principe, M., and The LIGO Scientific Collaboration
Subjects: Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Beat (acoustics), General Relativity and Quantum Cosmology (gr-qc), Astrophysics, General Relativity and Quantum Cosmology, stars: neutron, COMPACT CENTRAL OBJECT, Observatory, RAY POINT-SOURCE, supernovae: individual (Cassiopeia A), Supernova remnant, QC, Astrophysics::Galaxy Astrophysics, QB, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Gravitational wave, Exotic matter, INFRARED ECHOES, CONSTRAINTS, Astronomy and Astrophysics, Neutron star, Interferometry, BRAKING INDEX, Amplitude, gravitational waves, SATURATION, Space and Planetary Science, SPIN-DOWN, REMNANT, Astrophysics - High Energy Astrophysical Phenomena, CASSIOPEIA-A SUPERNOVA, EMISSION
Abstract: We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12-day interval taken from the fifth science run of the Laser Interferometer Gravitational-Wave Observatory. It searches gravitational wave frequencies from 100 to 300 Hz, and covers a wide range of first and second frequency derivatives appropriate for the age of the remnant and for different spin-down mechanisms. No gravitational wave signal was detected. Within the range of search frequencies, we set 95% confidence upper limits of 0.7--1.2e-24 on the intrinsic gravitational wave strain, 0.4--4e-4 on the equatorial ellipticity of the neutron star, and 0.005--0.14 on the amplitude of r-mode oscillations of the neutron star. These direct upper limits beat indirect limits derived from energy conservation and enter the range of theoretical predictions involving crystalline exotic matter or runaway r-modes. This is the first gravitational wave search to present upper limits on r-modes., 26 pages, 5 figures
Published: 2010

250. Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole.

Author: Psaltis D, Medeiros L, Christian P, Özel F, Akiyama K, Alberdi A, Alef W, Asada K, Azulay R, Ball D, Baloković M, Barrett J, Bintley D, Blackburn L, Boland W, Bower GC, Bremer M, Brinkerink CD, Brissenden R, Britzen S, Broguiere D, Bronzwaer T, Byun DY, Carlstrom JE, Chael A, Chan CK, Chatterjee S, Chatterjee K, Chen MT, Chen Y, Cho I, Conway JE, Cordes JM, Crew GB, Cui Y, Davelaar J, De Laurentis M, Deane R, Dempsey J, Desvignes G, Dexter J, Eatough RP, Falcke H, Fish VL, Fomalont E, Fraga-Encinas R, Friberg P, Fromm CM, Gammie CF, García R, Gentaz O, Goddi C, Gómez JL, Gu M, Gurwell M, Hada K, Hesper R, Ho LC, Ho P, Honma M, Huang CL, Huang L, Hughes DH, Inoue M, Issaoun S, James DJ, Jannuzi BT, Janssen M, Jiang W, Jimenez-Rosales A, Johnson MD, Jorstad S, Jung T, Karami M, Karuppusamy R, Kawashima T, Keating GK, Kettenis M, Kim JY, Kim J, Kim J, Kino M, Koay JY, Koch PM, Koyama S, Kramer M, Kramer C, Krichbaum TP, Kuo CY, Lauer TR, Lee SS, Li YR, Li Z, Lindqvist M, Lico R, Liu J, Liu K, Liuzzo E, Lo WP, Lobanov AP, Lonsdale C, Lu RS, Mao J, Markoff S, Marrone DP, Marscher AP, Martí-Vidal I, Matsushita S, Mizuno Y, Mizuno I, Moran JM, Moriyama K, Moscibrodzka M, Müller C, Musoke G, Mus Mejías A, Nagai H, Nagar NM, Narayan R, Narayanan G, Natarajan I, Neri R, Noutsos A, Okino H, Olivares H, Oyama T, Palumbo DCM, Park J, Patel N, Pen UL, Piétu V, Plambeck R, PopStefanija A, Prather B, Preciado-López JA, Ramakrishnan V, Rao R, Rawlings MG, Raymond AW, Ripperda B, Roelofs F, Rogers A, Ros E, Rose M, Roshanineshat A, Rottmann H, Roy AL, Ruszczyk C, Ryan BR, Rygl KLJ, Sánchez S, Sánchez-Arguelles D, Sasada M, Savolainen T, Schloerb FP, Schuster KF, Shao L, Shen Z, Small D, Sohn BW, SooHoo J, Tazaki F, Tilanus RPJ, Titus M, Torne P, Trent T, Traianou E, Trippe S, van Bemmel I, van Langevelde HJ, van Rossum DR, Wagner J, Wardle J, Ward-Thompson D, Weintroub J, Wex N, Wharton R, Wielgus M, Wong GN, Wu Q, Yoon D, Young A, Young K, Younsi Z, Yuan F, Yuan YF, and Zhao SS
Abstract: The 2017 Event Horizon Telescope (EHT) observations of the central source in M87 have led to the first measurement of the size of a black-hole shadow. This observation offers a new and clean gravitational test of the black-hole metric in the strong-field regime. We show analytically that spacetimes that deviate from the Kerr metric but satisfy weak-field tests can lead to large deviations in the predicted black-hole shadows that are inconsistent with even the current EHT measurements. We use numerical calculations of regular, parametric, non-Kerr metrics to identify the common characteristic among these different parametrizations that control the predicted shadow size. We show that the shadow-size measurements place significant constraints on deviation parameters that control the second post-Newtonian and higher orders of each metric and are, therefore, inaccessible to weak-field tests. The new constraints are complementary to those imposed by observations of gravitational waves from stellar-mass sources.
Published: 2020
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