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1. Ultra-high-energy gamma-ray bubble around microquasar V4641 Sgr.

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., Coutiño de León, S., De la Fuente, E., Depaoli, D., Di Lalla, N., Diaz Hernandez, R., Dingus, B. L., and DuVernois, M. A.

Abstract

Microquasars are laboratories for the study of jets of relativistic particles produced by accretion onto a spinning black hole. Microquasars are near enough to allow detailed imaging of spatial features across the multiwavelength spectrum. The recent extension measurement of the spatial morphology of a microquasar, SS 433, to TeV gamma rays1 localizes the acceleration of electrons at shocks in the jet far from the black hole2. V4641 Sagittarii (V4641 Sgr) is a similar binary system with a black hole and B-type main-sequence companion star and has an orbit period of 2.8 days (refs. 3,4). It stands out for its super-Eddington accretion5 and for its radio jet, which is one of the fastest superluminal jets in the Milky Way. Previous observations of V4641 Sgr did not report gamma-ray emission6. Here we report TeV gamma-ray emission from V4641 Sgr that reveals particle acceleration at similar distances from the black hole as SS 433. Furthermore, the gamma-ray spectrum of V4641 Sgr is among the hardest TeV spectra observed from any known gamma-ray source and is detected above 200 TeV. Gamma rays are produced by particles, either electrons or protons, of higher energies. Because energetic electrons lose energy more quickly the higher their energy, such a spectrum either very strongly constrains the electron-production mechanism or points to the acceleration of high-energy protons. This suggests that large-scale jets from microquasars could be more common than previously expected and that they could be a notable source of galactic cosmic rays7–9.Ultra-high-energy gamma-ray emission from the microquasar V4641 Sagittarii is reported, suggesting that large-scale jets from microquasars could be more common than previously thought and also could be a notable source of galactic cosmic rays. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Very-high-energy particle acceleration powered by the jets of the microquasar SS 433

Author

HAWC Collaboration, Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., ��lvarez, J. D., Arceo, R., Arteaga-Vel��zquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistr��n, T., Carrami��ana, A., Casanova, S., Castillo, M., Cotti, U., Cotzomi, J., de Le��n, S. Couti��o, De Le��n, C., De la Fuente, E., D��az-V��lez, J. C., Dichiara, S., Dingus, B. L., DuVernois, M. A., Ellsworth, R. W., Engel, K., Espinoza, C., Fang, K., Fleischhack, H., Fraija, N., Galv��n-G��mez, A., Garc��a-Gonz��lez, J. A., Garfias, F., Mu��oz, A. Gonz��lez, Gonz��lez, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Hueyotl-Zahuantitla, F., Hui, C. M., H��ntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kar, P., Kunde, G. J., Lauer, R. J., Lee, W. H., Vargas, H. Le��n, Li, H., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., L��pez-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Mart��nez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostaf��, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., P��rez-P��rez, E. G., Pretz, J., Ren, Z., Rho, C. D., Rivi��re, C., Rosa-Gonz��lez, D., Rosenberg, M., Ruiz-Velasco, E., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Arroyo, M. Seglar, Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, I., Tibolla, O., Tollefson, K., Torres, I., Vianello, G., Villase��or, L., Weisgarber, T., Werner, F., Westerhoff, S., Wood, J., Yapici, T., Yodh, G., Zepeda, A., Zhang, H., and Zhou, H.

Subjects
HAWC - Abteilung Hinton, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Multidisciplinary, High energy particle, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Compact star, 01 natural sciences, Charged particle, Luminosity, Black hole, Neutron star, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Roche lobe, Astrophysics - High Energy Astrophysical Phenomena, Supernova remnant, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

SS 433 is a binary system containing a supergiant star that is overflowing its Roche lobe with matter accreting onto a compact object (either a black hole or neutron star). Two jets of ionized matter with a bulk velocity of $\sim0.26c$ extend from the binary, perpendicular to the line of sight, and terminate inside W50, a supernova remnant that is being distorted by the jets. SS 433 differs from other microquasars in that the accretion is believed to be super-Eddington, and the luminosity of the system is $\sim10^{40}$ erg s$^{-1}$. The lobes of W50 in which the jets terminate, about 40 pc from the central source, are expected to accelerate charged particles, and indeed radio and X-ray emission consistent with electron synchrotron emission in a magnetic field have been observed. At higher energies (>100 GeV), the particle fluxes of $\gamma$ rays from X-ray hotspots around SS 433 have been reported as flux upper limits. In this energy regime, it has been unclear whether the emission is dominated by electrons that are interacting with photons from the cosmic microwave background through inverse-Compton scattering or by protons interacting with the ambient gas. Here we report TeV $\gamma$-ray observations of the SS 433/W50 system where the lobes are spatially resolved. The TeV emission is localized to structures in the lobes, far from the center of the system where the jets are formed. We have measured photon energies of at least 25 TeV, and these are certainly not Doppler boosted, because of the viewing geometry. We conclude that the emission from radio to TeV energies is consistent with a single population of electrons with energies extending to at least hundreds of TeV in a magnetic field of $\sim16$~micro-Gauss., Comment: Preprint version of Nature paper. Contacts: S. BenZvi, B. Dingus, K. Fang, C.D. Rho , H. Zhang, H. Zhou

Published
2018
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3. An absence of neutrinos associated with cosmic-ray acceleration in γ-ray bursts

Author

Abbasi, R., Abdou, Y., Abu-Zayyad, T., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Altmann, D., Andeen, K., Auffenberg, J., Bai, X., Baker, M., Barwick, S. W., Bay, R., Bazo Alba, J. L., Beattie, K., Beatty, J. J., Bechet, S., Becker, J. K., Becker, K.-H., Bell, M., Benabderrahmane, M. L., BenZvi, S., Berdermann, J., Berghaus, P., Berley, D., Bernardini, E., Bertrand, D., Besson, D. Z., Bindig, D., Bissok, M., Blaufuss, E., Blumenthal, J., Boersma, D. J., Bohm, C., Bose, D., Böser, S., Botner, O., Brayeur, L., Brown, A. M., Buitink, S., Caballero-Mora, K. S., Carson, M., Casier, M., Chirkin, D., Christy, B., Clevermann, F., Cohen, S., Colnard, C., Cowen, D. F., Cruz Silva, A. H., D’Agostino, M. V., Danninger, M., Daughhetee, J., Davis, J. C., De Clercq, C., Degner, T., Descamps, F., Desiati, P., de Vries-Uiterweerd, G., DeYoung, T., Díaz-Vélez, J. C., Dierckxsens, M., Dreyer, J., Dumm, J. P., Dunkman, M., Eisch, J., Ellsworth, R. W., Engdegård, O., Euler, S., Evenson, P. A., Fadiran, O., Fazely, A. R., Fedynitch, A., Feintzeig, J., Feusels, T., Filimonov, K., Finley, C., Fischer-Wasels, T., Flis, S., Franckowiak, A., Franke, R., Gaisser, T. K., Gallagher, J., Gerhardt, L., Gladstone, L., Glüsenkamp, T., Goldschmidt, A., Goodman, J. A., Góra, D., Grant, D., Griesel, T., Gro, A., Grullon, S., Gurtner, M., Ha, C., Haj Ismail, A., Hallgren, A., Halzen, F., Han, K., Hanson, K., Heereman, D., Heinen, D., Helbing, K., Hellauer, R., Hickford, S., Hill, G. C., Hoffman, K. D., Hoffmann, B., Homeier, A., Hoshina, K., Huelsnitz, W., Hül, J.-P., Hulth, P. O., Hultqvist, K., Hussain, S., Ishihara, A., Jacobi, E., Jacobsen, J., Japaridze, G. S., Johansson, H., Kappes, A., Karg, T., Karle, A., Kiryluk, J., Kislat, F., Klein, S. R., Köhne, J.-H., Kohnen, G., Kolanoski, H., Köpke, L., Kopper, S., Koskinen, D. J., Kowalski, M., Kowarik, T., Krasberg, M., Kroll, G., Kunnen, J., Kurahashi, N., Kuwabara, T., Labare, M., Laihem, K., Landsman, H., Larson, M. J., Lauer, R., Lünemann, J., Madsen, J., Marotta, A., Maruyama, R., Mase, K., Matis, H. S., Meagher, K., Merck, M., Mészáros, P., Meures, T., Miarecki, S., Middell, E., Milke, N., Miller, J., Montaruli, T., Morse, R., Movit, S. M., Nahnhauer, R., Nam, J. W., Naumann, U., Nowicki, S. C., Nygren, D. R., Odrowski, S., Olivas, A., Olivo, M., O’Murchadha, A., Panknin, S., Paul, L., Pérez de los Heros, C., Piegsa, A., Pieloth, D., Posselt, J., Price, P. B., Przybylski, G. T., Rawlins, K., Redl, P., Resconi, E., Rhode, W., Ribordy, M., Richman, M., Riedel, B., Rizzo, A., Rodrigues, J. P., Rothmaier, F., Rott, C., Ruhe, T., Rutledge, D., Ruzybayev, B., Ryckbosch, D., Sander, H.-G., Santander, M., Sarkar, S., Schatto, K., Schmidt, T., Schöneberg, S., Schönwald, A., Schukraft, A., Schulte, L., Schultes, A., Schulz, O., Schunck, M., Seckel, D., Semburg, B., Seo, S. H., Sestayo, Y., Seunarine, S., Silvestri, A., Smith, M. W. E., Spiczak, G. M., Spiering, C., Stamatikos, M., Stanev, T., Stezelberger, T., Stokstad, R. G., Stöl, A., Strahler, E. A., Ström, R., Stüer, M., Sullivan, G. W., Taavola, H., Taboada, I., Tamburro, A., Ter-Antonyan, S., Tilav, S., Toale, P. A., Toscano, S., Tosi, D., van Eijndhoven, N., Van Overloop, A., van Santen, J., Vehring, M., Voge, M., Walck, C., Waldenmaier, T., Wallraff, M., Walter, M., Wasserman, R., Weaver, Ch., Wendt, C., Westerhoff, S., Whitehorn, N., Wiebe, K., Wiebusch, C. H., Williams, D. R., Wischnewski, R., Wissing, H., Wolf, M., Wood, T. R., Woschnagg, K., Xu, C., Xu, D. L., Xu, X. W., Yanez, J. P., Yodh, G., Yoshida, S., Zarzhitsky, P., and Zoll, M.

Published
2012
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4. Publisher Correction: Very-high-energy particle acceleration powered by the jets of the microquasar SS 433

Author

Abeysekara, A. U., primary, Albert, A., additional, Alfaro, R., additional, Alvarez, C., additional, Álvarez, J. D., additional, Arceo, R., additional, Arteaga-Velázquez, J. C., additional, Avila Rojas, D., additional, Ayala Solares, H. A., additional, Belmont-Moreno, E., additional, BenZvi, S. Y., additional, Brisbois, C., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Castillo, M., additional, Cotti, U., additional, Cotzomi, J., additional, Coutiño de León, S., additional, De León, C., additional, De la Fuente, E., additional, Díaz-Vélez, J. C., additional, Dichiara, S., additional, Dingus, B. L., additional, DuVernois, M. A., additional, Ellsworth, R. W., additional, Engel, K., additional, Espinoza, C., additional, Fang, K., additional, Fleischhack, H., additional, Fraija, N., additional, Galván-Gámez, A., additional, García-González, J. A., additional, Garfias, F., additional, González-Muñoz, A., additional, González, M. M., additional, Goodman, J. A., additional, Hampel-Arias, Z., additional, Harding, J. P., additional, Hernandez, S., additional, Hinton, J., additional, Hona, B., additional, Hueyotl-Zahuantitla, F., additional, Hui, C. M., additional, Hüntemeyer, P., additional, Iriarte, A., additional, Jardin-Blicq, A., additional, Joshi, V., additional, Kaufmann, S., additional, Kar, P., additional, Kunde, G. J., additional, Lauer, R. J., additional, Lee, W. H., additional, León Vargas, H., additional, Li, H., additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, López-Coto, R., additional, Malone, K., additional, Marinelli, S. S., additional, Martinez, O., additional, Martinez-Castellanos, I., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Newbold, M., additional, Nisa, M. U., additional, Noriega-Papaqui, R., additional, Pretz, J., additional, Pérez-Pérez, E. G., additional, Ren, Z., additional, Rho, C. D., additional, Rivière, C., additional, Rosa-González, D., additional, Rosenberg, M., additional, Ruiz-Velasco, E., additional, Salesa Greus, F., additional, Sandoval, A., additional, Schneider, M., additional, Schoorlemmer, H., additional, Seglar Arroyo, M., additional, Sinnis, G., additional, Smith, A. J., additional, Springer, R. W., additional, Surajbali, P., additional, Taboada, I., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Vianello, G., additional, Villaseñor, L., additional, Weisgarber, T., additional, Werner, F., additional, Westerhoff, S., additional, Wood, J., additional, Yapici, T., additional, Yodh, G., additional, Zepeda, A., additional, Zhang, H., additional, and Zhou, H., additional

Published
2018
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5. Very-high-energy particle acceleration powered by the jets of the microquasar SS 433

Author

Abeysekara, A. U., primary, Albert, A., additional, Alfaro, R., additional, Alvarez, C., additional, Álvarez, J. D., additional, Arceo, R., additional, Arteaga-Velázquez, J. C., additional, Avila Rojas, D., additional, Ayala Solares, H. A., additional, Belmont-Moreno, E., additional, BenZvi, S. Y., additional, Brisbois, C., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Castillo, M., additional, Cotti, U., additional, Cotzomi, J., additional, Coutiño de León, S., additional, De León, C., additional, De la Fuente, E., additional, Díaz-Vélez, J. C., additional, Dichiara, S., additional, Dingus, B. L., additional, DuVernois, M. A., additional, Ellsworth, R. W., additional, Engel, K., additional, Espinoza, C., additional, Fang, K., additional, Fleischhack, H., additional, Fraija, N., additional, Galván-Gámez, A., additional, García-González, J. A., additional, Garfias, F., additional, González-Muñoz, A., additional, González, M. M., additional, Goodman, J. A., additional, Hampel-Arias, Z., additional, Harding, J. P., additional, Hernandez, S., additional, Hinton, J., additional, Hona, B., additional, Hueyotl-Zahuantitla, F., additional, Hui, C. M., additional, Hüntemeyer, P., additional, Iriarte, A., additional, Jardin-Blicq, A., additional, Joshi, V., additional, Kaufmann, S., additional, Kar, P., additional, Kunde, G. J., additional, Lauer, R. J., additional, Lee, W. H., additional, León Vargas, H., additional, Li, H., additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, López-Coto, R., additional, Malone, K., additional, Marinelli, S. S., additional, Martinez, O., additional, Martinez-Castellanos, I., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Newbold, M., additional, Nisa, M. U., additional, Noriega-Papaqui, R., additional, Pretz, J., additional, Pérez-Pérez, E. G., additional, Ren, Z., additional, Rho, C. D., additional, Rivière, C., additional, Rosa-González, D., additional, Rosenberg, M., additional, Ruiz-Velasco, E., additional, Salesa Greus, F., additional, Sandoval, A., additional, Schneider, M., additional, Schoorlemmer, H., additional, Seglar Arroyo, M., additional, Sinnis, G., additional, Smith, A. J., additional, Springer, R. W., additional, Surajbali, P., additional, Taboada, I., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Vianello, G., additional, Villaseñor, L., additional, Weisgarber, T., additional, Werner, F., additional, Westerhoff, S., additional, Wood, J., additional, Yapici, T., additional, Yodh, G., additional, Zepeda, A., additional, Zhang, H., additional, and Zhou, H., additional

Published
2018
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