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2,010 results on '"Carramiñana, A."'

51. Valuative trees over valued fields

Author

Alberich-Carramiñana, Maria, Guàrdia, Jordi, Nart, Enric, and Roé, Joaquim

Subjects
Mathematics - Algebraic Geometry, 13A18 (12J10, 12J20, 14E15)
Abstract

For an arbitrary valued field $(K,v)$ and a given extension $v(K^*)\hookrightarrow\Lambda$ of ordered groups, we analyze the structure of the tree formed by all $\Lambda$-valued extensions of $v$ to the polynomial ring $K[x]$. As an application, we find a model for the tree of all equivalence classes of valuations on $K[x]$ (without fixing their value group), whose restriction to $K$ is equivalent to $v$. In the henselian case, we apply these results to show that there is a complete parallelism between the arithmetic properties of irreducible polynomials $F\in K[x]$, encoded by their Okutsu frames, and the valuation-theoretic properties of their induced valuations $v_F$ on $K[x]$, encoded by their MacLane-Vaqui\'e chains. This parallelism was only known for defectless irreducible polynomials., Comment: V2, April 2022

Published
2021

52. TeV emission of Galactic plane sources with HAWC and H.E.S.S

Author

Abdalla, H., Aharonian, F., Benkhali, F. Ait, Angüner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Martins, V. Barbosa, Barnacka, A., Barnard, M., Becherini, Y., Berge, D., Bernlöhr, K., Bi, B., Böttcher, M., Boisson, C., Bolmont, J., de Lavergne, M. de Bony, Breuhaus, M., Brose, R., Brun, F., Brun, P., Bryan, M., Büchele, M., Bulik, T., Bylund, T., Caroff, S., Carosi, A., Chand, T., Chandra, S., Chen, A., Cotter, G., Curyło, M., Mbarubucyeye, J. Damascene, Davids, I. D., Davies, J., Deil, C., Devin, J., Dirson, L., Djannati-Ataï, A., Dmytriiev, A., Donath, A., Doroshenko, V., Dreyer, L., Duffy, C., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J. -P., Feijen, K., Fegan, S., Fiasson, A., de Clairfontaine, G. Fichet, 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., 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., Leuschner, F., 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., Mitchell, A. M. W., Moderski, R., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., de Naurois, M., Ndiyavala, H., Niemiec, J., Oakes, L., Brien, P. O, Odaka, H., Ohm, S., Olivera-Nieto, L., Wilhelmi, E. de Ona, Ostrowski, M., Panny, S., Panter, M., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Noel, A. Priyana, Prokhorov, D. A., Prokoph, H., Pühlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Rauth, R., Reichherzer, P., Reimer, A., Reimer, O., Remy, Q., Renaud, M., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Sahakian, V., Sailer, S., Salzmann, H., Sanchez, D. A., Santangelo, A., Sasaki, M., Schäfer, J., Schüssler, F., Schutte, H. M., Schwanke, U., Seglar-Arroyo, M., Senniappan, M., Seyffert, A. S., Shafi, N., Shapopi, J. N. S., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., Spir-Jacob, M., Stawarz, Ł., Sun, L., Steenkamp, R., Stegmann, C., Steinmassl, S., Steppa, C., Takahashi, T., Tavernier, T., Taylor, A. M., Terrier, R., Thiersen, J. H. E., 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., 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., Zmija, A., Zorn, J., Zouari, S., Żywucka, N., Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Hernandez, R. Diaz, Díaz-Vélez, J. C., Dingus, B. L., DuVernois, M. A., Durocher, M., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., López-Coto, R., Malone, K., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna-Franco, J., Smith, A. J., Springer, R. W., Surajbali, P., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Willox, E., and Zhou, H.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The High Altitude Water Cherenkov (HAWC) observatory and the High Energy Stereoscopic System (H.E.S.S.) are two leading instruments in the ground-based very-high-energy gamma-ray domain. HAWC employs the water Cherenkov detection (WCD) technique, while H.E.S.S. is an array of Imaging Atmospheric Cherenkov Telescopes (IACTs). The two facilities therefore differ in multiple aspects, including their observation strategy, the size of their field of view and their angular resolution, leading to different analysis approaches. Until now, it has been unclear if the results of observations by both types of instruments are consistent: several of the recently discovered HAWC sources have been followed up by IACTs, resulting in a confirmed detection only in a minority of cases. With this paper, we go further and try to resolve the tensions between previous results by performing a new analysis of the H.E.S.S. Galactic plane survey data, applying an analysis technique comparable between H.E.S.S. and HAWC. Events above 1 TeV are selected for both datasets, the point spread function of H.E.S.S. is broadened to approach that of HAWC, and a similar background estimation method is used. This is the first detailed comparison of the Galactic plane observed by both instruments. H.E.S.S. can confirm the gamma-ray emission of four HAWC sources among seven previously undetected by IACTs, while the three others have measured fluxes below the sensitivity of the H.E.S.S. dataset. Remaining differences in the overall gamma-ray flux can be explained by the systematic uncertainties. Therefore, we confirm a consistent view of the gamma-ray sky between WCD and IACT techniques.

Published
2021
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53. Long-term spectra of the blazars Mrk 421 and Mrk 501 at TeV energies seen by HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Lara, A., Lee, W. H., Lee, J., Vargas, H. León, Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Noriega-Papaqui, R., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Serna-Franco, J., Smith, A. J., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Weisgarber, T., Willox, E., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory surveys the very high energy sky in the 300 GeV to $>100$ TeV energy range. HAWC has detected two blazars above $11\sigma$, Markarian 421 (Mrk 421) and Markarian 501 (Mrk 501). The observations are comprised of data taken in the period between June 2015 and July 2018, resulting in a $\sim 1038$ days of exposure. In this work we report the time-averaged spectral analysis for both sources above 0.5 TeV. Taking into account the flux attenuation due to the extragalactic background light (EBL), the intrinsic spectrum of Mrk 421 is described by a power law with an exponential energy cut-off with index $\alpha=2.26\pm(0.12)_{stat}(_{-0.2}^{+0.17})_{sys}$ and energy cut-off $E_c=5.1\pm(1.6)_{stat}(_{-2.5}^{+1.4})_{sys}$ TeV, while the intrinsic spectrum of Mrk 501 is better described by a simple power law with index $\alpha=2.61\pm(0.11)_{stat}(_{-0.07}^{+0.01})_{sys}$. The maximum energies at which the Mrk 421 and Mrk 501 signals are detected are 9 and 12 TeV, respectively. This makes these some of the highest energy detections to date for spectra averaged over years-long timescales. Since the observation of gamma radiation from blazars provides information about the physical processes that take place in their relativistic jets, it is important to study the broad-band spectral energy distribution (SED) of these objects. To this purpose, contemporaneous data in the gamma-ray band to X-ray range, and literature data in the radio to UV range, were used to build time-averaged SEDs that were modeled within a synchrotron self-Compton leptonic scenario., Comment: 16 pages, 5 tables, 9 figures

Published
2021
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57. Pathological findings associated with the updated European Society of Cardiology 2022 guidelines for preoperative cardiac testing: an observational cohort modelling study

Author

Kemper, Johann, Kohaupt, Lena, Witzler, Jette, Tuzhikov, Michael, Roth, Sebastian, Stroda, Alexandra, M’Pembele, René, Tenge, Theresa, Schultze, Cornelia, Verbarg, Nele, Gehrke, Christian, Klemann, Anna Katharina, Hagebölling, Friederike, Albrecht, Svenja, Stroeder, Jakob, Schubert, Ann-Kristin, Espeter, Florian, Russe, Benedikt, Weigand, Markus A., Bergmann, Lars, Unterberg, Matthias, Bischoff, Petra, Pirzer, Raphael, Rach, Patric Rene, Ott, Klaus, Zarbock, Alexander, Kowark, Ana, Neumann, Claudia, Marchand, Bahareh, Sponholz, Christoph, Rueffert, Henrik, Kramer, Mira, Zacharowski, Kai, Meybohm, Patrick, Lindau, Simone, Carollo, Melissa, Novazzi, Cecilia, Toso, Fiorenza, Bacuzzi, Alessandro, Ragazzi, Riccardo, Volta, Carlo Alberto, De Giorgi, Francesco, Bacer, Barbara, Federico, Antonio, Chiumello, Davide, Vetrugno, Luigi, Castella, Alberto, Tesoro, Simonetta, Cotoia, Antonella, Bignami, Elena, Bellissima, Agrippino, Cortegiani, Andrea, Crisman, Marco, Toninelli, Arturo, Piazza, Ornella, Mirabella, Lucia, Bossolasco, Matteo, Bona, Francesco, Perdomo, Juan Manuel, Coca-Martinez, Miquel, Carramiñana, Albert, Servén, Marta Giné, González, Astrid Batalla, Gil Sánchez, José Maria, Becerra-Bolaños, Ángel, Rodríguez-Pérez, Aurelio, Soler, Anna Artigas, Basso, Morena, Font, Anna Peig, Vernetta, Diana, Santos, Julia Hernando, Muñoz, Enrique Alday, Olivares, Mercedes Cabellos, Marco, Gregorio, Lopez, Maria Bermudez, Barrio, Javier, Forés, María Isabel, Boix, Estefanía, Ayuso, Mercedes, Petre, Bogdan Sorel, Oprea, Ioana Sorina, Latiș, Mihai Dan, Margarit, Simona, Vasian, Horatiu, Tomescu, Dana, Cîndea, Iulia, Dirzu, Dan Sebastian, Copotoiu, Sanda-Maria, Moise, Alida, Bubenek-Turconi, Serban, Valeanu, Liana, Wanner, Patrick Mark, Djurdjevic, Mirjana, Nuth, Sandra, Seeberger, Esther, Goettel, Nicolai, Kamber, Firmin, Ganter, Michael Thomas, Gerber, Thomas Jan, Schneebeli, Daniela, Pregernig, Andreas, Grape, Sina, Tomala, Simon, Pinto, Bernardo Bollen, Żukowski, Maciej, Zegan-Barańska, Małgorzata, Karolak, Igor, Krzych, Lukasz, Czajka, Szymon, Studzińska, Dorota, Kluzik, Anna, Koszel, Tomasz, Pabjańczyk, Izabela, Gajdosz, Anna, Erkoc, Suheyla Karadag, Meco, Basak Ceyda, Koltka, Ahmet Kemalettin, Dincer, Muserref Beril, Ekmekçi, Perihan, Saracoglu, Kemal Tolga, Solmaz, Filiz Alkaya, Ozcelik, Menekse, Arun, Oguzhan, Dilmen, Ozlem Korkmaz, Preckel, Benedikt, Hollmann, Markus W., Hazen, Yannick, Donald de Boer, Hans, Epema, Anne, Koopman, Seppe, Van Lier, Felix, Pinto, Rita, Carrão, André, Ribeiro, Daniel, Mourão, Joana, Coelho, Miguel, Losa, Nuno, Santos, Nuno, Cabral, Luis, Afonso, Diana, Zenha, Sérgio, Ramos, Cristina, Hipólito, Carla, Vasilaki, Maria, Andreeva, Antonia, Zaimi, Donika, Chalkias, Athanasios, Spyraki, Maria, Rekatsina, Martina, Tsaousi, Georgia, Short, Anthony, Meier, Sonja, Madhuri, Thumuluru Kavitha, Latham, Scott, Knock, James, Drummond, Andrew, Ramsden, Fiona, Kubisz-Pudelko, Agnieszka, Walker, James, Moppett, Iain, White, Louise, Jackson, Matthew, Reschreiter, Henrik, Innes, Richard, Chew, Michelle, Kalman, Sigridur, Wallden, Jakob, Schening, Anna, Jonikaite, Lina, Enlund, Anna, De Baerdemaeker, Luc, Morrison, Stuart, Rex, Steffen, Alexis, Alexandros, Khoronenko, Viktoria E., Ovezov, Alexey, Belskii, Vladislav, Kaznacheeva, Kseniya, Gritsan, Alexey, Kuzmanovska, Biljana, Malinovska-Nikolovska, Liljana, Barisin, Stjepan, Poredos, Peter, Arabadzhieva, Daniela, Unic-Stojanovic, Dragana, Golubović, Mladjan, Fleischmann, Edith, Kotzinger, Oskar, Des Deserts, Marc Danguy, Ducrocq, Nicolas, Buggy, Donal J., Bonnet, Jean François, Cusack, Barbara, Calleja, Paul, Hasani, Antigona, Nallbani, Rajmonda, Mauermann, Eckhard, Ionescu, Daniela, Szczeklik, Wojciech, De Hert, Stefan, Filipovic, Miodrag, Beck Schimmer, Beatrice, Spadaro, Savino, Matute, Purificación, Ganter, Michael T., Turhan, Sanem C., van Waes, Judith, Lagarto, Filipa, Theodoraki, Kassiani, Gupta, Anil, Gillmann, Hans-Jörg, Guzzetti, Luca, Kotfis, Katarzyna, Larmann, Jan, Corneci, Dan, Howell, Simon J., and Lurati Buse, Giovanna

Published
2024
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59. Individualised, perioperative open-lung ventilation strategy during one-lung ventilation (iPROVE-OLV): a multicentre, randomised, controlled clinical trial

Author

Spadaro, Savino, Scaramuzzo, Gaetano, Cervantes, Oriol, Parera, Ana, Argilaga, Marta, Herranz, Gracia, Unzueta, Carmen, Vives, Marc, Regi, Kevin, Costa-Reverte, Marta, Leal, Maria Sonsoles, Ramasco, Fernando, Nieves-Alonso, Jesús, García, Esther, Suárez-Sipmann, Fernando, Rodríguez-Pérez, Aurelio, Fariña, Roberto, Cabrera, Sergio, Guerra, Elisabeth, Gallego-Ligorit, Lucia, Herrero-Izquierdo, Alba, Vallés-Torres, J, Piñeiro, Patricia, Garutti, Ignacio, Ramos, Silvia, López-Herrera, Daniel, De La Matta, Manuel, Gokhan, Sertcakacilar, Kucur, Evrim, Mugarra, Ana, Belda, Francisco Javier, Soro, Marina, García, Laura, Sastre, Jose Alfonso, Aguirre, Pilar, Jimena-Salazar, Claudia, Ramos, María Carolina, Trespalacios, Ramón, Ezequiel-Fernández, Féliz, Mirabella, Lucia, Lamanna, Angella, Cantatore, Leonarda P, Laforogia, Donato, Bellas, Soledad, López, Carlos, Carramiñana, Albert, Navarro-Ripoll, Ricard, Martínez, Samira, Vallverdú, Jordi, Jacas, Adriana, Ferrando, Carlos, Yepes-Temiño, Maria José, Librero, Julián, Tusman, Gerardo, Villar, Jesús, Martinez, Selene, Azparren, Gonzalo, Bausili, Marc, Torres, Silvia, Díaz, María, Ricart, Ana, Gascó, Iñaki, Parramon, Fina, Sanz-Iturbe, Maite, García-Ballester, Sara, Méndez-Arias, Esther, Cabadas, Rafael, Grosso, Laura, Becerra, Ángel, Hussein, Zoraya, Sanjuán-Villarreal, T Alberto, Puértolas, María, Izquierdo-Villarroya, Blanca, Almajano, Rosa, Romero, Blanca, Colomina, Lorena, Quesada, Natividad, Latorre, José Antonio, Franco, José Antonio, Laval, Anaïs, García-Tirado, Javier, Embún, Raúl, Bueno, Cristina, Jarén, Paula, Martínez-Serrano, Raquel, García-Latasa, Beatriz, Baquedano, Sonia, Motilva, Begoña, Hernando, Belén, Herrero, Miriam, Oliver-Forniés, Pablo, Recuero, José Luis, Carbó-Espinosa, Fernando, Lucas, Alejandro, Muñoz-González, Nadia, Lafuente, Noelia, Acosta-Martínez, Jesús, Ragazzi, Riccardo, Volta, Carlo Alberto, Maniscalco, Pio, Arribas, María Pilar, de Celis, María Isabel, Pascual, María Jesús, Martínez, Pedro, Martínez, Olga, Repáraz, José Ramón, Domínguez, David, Fernández, Marta, Sánchez, Víctor, Pérez-Lozana, Blanca, Martín, Eliseba, Fernández, David, González, Adrian, Pico, Jandro, El-Hefny, Dalia Ahmed, Armengol, Laura, Comino, Óscar, Rovira, Irene, Arguis, María José, Matute, Purificación, Carretero, María José, Ibáñez, Cristina, Perdomo, Juan, Ruiz, Cristina, González, Nel, González, Miren, Bolado, Ana, Trabanco, Sonia, Largo, Ángela, Maestro, Alejandro, Pascual, Ángela, Reyes, Adriana Ixquic, Bartolomé, María José, Williams, Mónica Mercedes, del Olmo, Pablo, Cimadevilla, Bonifacio, Pardo, Sara, Sancho, Laura, Lascorz, Laura, Carbonell, José Antonio, Hurtado, Luis, Florea, Raluca, Martínez-Castro, Sara, Monleón, Berta, Pérez, Sara, Jurado, Ana, Barcena, Elizabeth, Segura, Nasara, Cuervo, Javier, Belmonte, Luis, Pardo, Pablo, Utrera, Esther, Serralta, Ferran, Parra, María José, Arocas, Blanca, Gutiérrez, Andrea, Cruz-Pardos, Patricia, de la Gala-García, Francisco, Sánchez-Pedrosa, Guillermo, Duque-González, Patricia, De La Fuente-Tornero, Elena, Puig-Ramos, Ángela, García-Hernández, Santiago, Martínez-Gascueña, David, Calvo-García, Carlos Alberto, Reyes-Fierro, Almudena, Novoa-Lago, Emma, Anaya-Camacho, Rafael, Monteserín-Matesanz, Cristina, Martínez-Merino, Nuria, Arnalich-Montiel, Ana, Pizarro-Calderón, Ana Gloria, Ruiz-Ortega, Adela, Benito-Saz, Pilar, Rodríguez, Adoración Elvira, García-Bünger, Beatriz, García-Ramos, Sergio, López-Gil, Elena, Power-Esteban, Mercedes, Ramos-Fernándes, Rafael, Sevilla-Bayón, Raúl, Solchaga-Sánchez, Isabel, Tullo, Livio, Gambetti, Guido, Carrideo, Antonio, Morelli, Alessandra, Aiello, Davide, Spiga, Stefania, Sonsoles Leal, María, Sastre, José Alfonso, Salazar, Claudia Jimena, Morocho, Diego Rolando, Ezequiel-Fernández, Félix, Pia Cantatore, Leonarda, Laforgia, Donato, and Yepes-Temiño, María José

Published
2024
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60. Curve singularities with one Puiseux pair and value sets of modules over their local rings

Author

Alberich-Carramiñana, Maria, Almirón, Patricio, and Moyano-Fernández, Julio José

Subjects
Mathematics - Commutative Algebra, Mathematics - Algebraic Geometry, Primary: 14H20, 20M12, Secondary: 13N05, 13C12, 14B07
Abstract

In this paper we characterize the value set $\Delta$ of the $R$-modules of the form $R+zR$ for the local ring $R$ associated to a germ $\xi$ of an irreducible plane curve singularity with one Puiseux pair. In the particular case of the module of K\"ahler differentials attached to $\xi$, we recover some results of Delorme. From our characterization of $\Delta$ we introduce a proper subset of semimodules over the value semigroup of the ring $R$. Moreover, we provide a geometric algorithm to construct all possible semimodules in this subset for a given value semigroup., Comment: v3: Theorem 3.4 in v2 has been eliminated as a result of a gap in the proof. Section 3.2 in v2 has been eliminated. The rest of main results remain unchanged. General redaction has been improved. v1: Comments are very welcome! 19 pages. 5 Figures

Published
2021

61. An Inextensible Model for Robotic Simulations of Textiles

Author

Coltraro, Franco, Amorós, Jaume, Alberich-Carramiñana, Maria, and Torras, Carme

Subjects
Computer Science - Robotics, Mathematics - Differential Geometry, 74K20, 53Z05, I.6.8, I.3.7, I.3.8, J.2
Abstract

We introduce a new isometric strain model for the study of the dynamics of cloth garments in a moderate stress environment, such as robotic manipulation in the neighborhood of humans. This model treats textiles as surfaces which are inextensible, admitting only isometric motions. Inextensibility is imposed in a continuous setting, prior to any discretization, which gives consistency with respect to re-meshing and prevents the problem of locking even with coarse meshes. The simulations of robotic manipulation using the model are compared to the actual manipulation in the real world, finding that the error between the simulated and real position of each point in the garment is lower than 1cm in average, even when a coarse mesh is used. Aerodynamic contributions to motion are incorporated to the model through the virtual uncoupling of the inertial and gravitational mass of the garment. This approach results in an accurate, as compared to reality, description of cloth motion incorporating aerodynamic effects by using only two parameters., Comment: 29 pages, 18 figures, 3 tables, 1 algorithm

Published
2021

62. HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velazquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Blandford, R., Brisbois, C., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Cotti, U., de Leon, S. Coutino, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Diaz-Velez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Fleischhack, H., Fraija, N., Galvan-Gamez, A., Garcia, D., Garcıa-Gonzalez, J. A., Garfias, F., Giacinti, G., Gonzalez, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Vargas, H. Leon, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martinez-Castellanos, I., Martinez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Soto, J. A. Morales, Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Perez, Perez-Perez, E. G., Ren, Z., Rho, C. D., Rosa-Gonzalez, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandova, A., Schneider, M., Schoorlemmer, H., Serna, F., Smith, A. J., Springer, R. W., Surajbali, P., Tollefson, K., Torres, I., Torres-Escobedo, R., Urena-Mena, F., Weisgarber, T., Werner, F., Willox, E., Zepeda, A., Zhou, H., on, C. De Le, and Alvarez, J. D.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Cosmic rays with energies up to a few PeV are known to be accelerated within the Milky Way. Traditionally, it has been presumed that supernova remnants were the main source of very-high-energy cosmic rays but theoretically it is difficult to get protons to PeV energies and observationally there simply is no evidence to support the remnants as sources of hadrons with energies above a few tens of TeV. One possible source of protons with those energies is the Galactic Center region. Here we report observations of 1-100 TeV gamma rays coming from the 'Cygnus Cocoon', which is a superbubble surrounding a region of OB2 massive star formation. These gamma rays are likely produced by 10-1000 TeV freshly accelerated CRs originating from the enclosed star forming region Cygnus OB2. Hitherto it was not known that such regions could accelerate particles to these energies. The measured flux is likely originated by hadronic interactions. The spectral shape and the emission profile of the Cocoon changes from GeV to TeV energies, which reveals the transport of cosmic particles and historical activity in the superbubble.

Published
2021
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63. Developable surfaces with prescribed boundary

Author

Alberich-Carramiñana, Maria, Amorós, Jaume, and Coltraro, Franco

Subjects
Mathematics - Differential Geometry, 53C24, 53C42, 53Z30
Abstract

It is proved that a generic simple, closed, piecewise regular curve in space can be the boundary of only finitely many developable surfaces with nonvanishing mean curvature. The relevance of this result in the context of the dynamics of developable surfaces is discussed., Comment: Submitted to the conference 'Women in Geometry and Topology', held on September 25-27, 2019, at the Centre de Recerca Matem\`atica, Bellaterra, Spain

Published
2021

64. HAWC Search for High-Mass Microquasars

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velazquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Cotti, U., Cotzomi, J., De la Fuente, E., de Leon, C., Hernandez, R. Diaz, Diaz-Velez, J. C., Dingus, B. L., Durocher, M., DuVernois, M. A., Ellsworth, R. W., Espinoza, C., Fan, K. L., Fang, K., Fraija, N., Galvan-Gamez, A., Garcia-Gonzalez, J. A., Garfias, F., Gonzalez, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, J., Lee, W. H., Vargas, H. Leon, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martinez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Perez, Rho, C. D., Roh, Y. J., Rosa-Gonzalez, D., Greus, F. Salesa, Sandoval, A., Schneider, M., Serna-Franco, J., Smith, A. J., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Urena-Mena, F., Villasenor, L., Watson, I. J., Weisgarber, T., Willox, E., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Microquasars with high-mass companion stars are promising very-high-energy (VHE; 0.1-100 TeV) gamma-ray emitters, but their behaviors above 10 TeV are poorly known. Using the High Altitude Water Cherenkov (HAWC) observatory, we search for excess gamma-ray emission coincident with the positions of known high-mass microquasars (HMMQs). No significant emission is observed for LS 5039, Cygnus X-1, Cygnus X-3, and SS 433 with 1,523 days of HAWC data. We set the most stringent limit above 10 TeV obtained to date on each individual source. Under the assumption that HMMQs produce gamma rays via a common mechanism, we have performed source-stacking searches, considering two different scenarios: I) gamma-ray luminosity is a fraction $\epsilon_\gamma$ of the microquasar jet luminosity, and II) very-high-energy gamma rays are produced by relativistic electrons up-scattering the radiation field of the companion star in a magnetic field $B$. We obtain $\epsilon_\gamma < 5.4\times 10^{-6}$ for scenario I, which tightly constrains models that suggest observable high-energy neutrino emission by HMMQs. In the case of scenario II, the non-detection of VHE gamma rays yields a strong magnetic field, which challenges synchrotron radiation as the dominant mechanism of the microquasar emission between 10 keV and 10 MeV., Comment: Accepted for publication in ApJL

Published
2021
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65. Probing the Sea of Cosmic Rays by Measuring Gamma-Ray Emission from Passive Giant Molecular Clouds with HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., Galván-Gámez, A., Garcia, D., González, J. A. García-González F. Garfias M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Greus, F. Salesa, Sandoval, A., Schneider, M., Serna-Franco, J., Smith, A. J., Springer, R. W., Surajbali, P., Tanner, M., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Willox, E., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The study of high-energy gamma rays from passive Giant Molecular Clouds (GMCs) in our Galaxy is an indirect way to characterize and probe the paradigm of the "sea" of cosmic rays in distant parts of the Galaxy. By using data from the High Altitude Water Cherenkov (HAWC) observatory, we measure the gamma-ray flux above 1 TeV of a set of these clouds to test the paradigm. We selected high-galactic latitude clouds that are in HAWC's field-of-view and which are within 1~kpc distance from the Sun. We find no significant excess emission in the cloud regions, nor when we perform a stacked log-likelihood analysis of GMCs. Using a Bayesian approach, we calculate 95\% credible intervals upper limits of the gamma-ray flux and estimate limits on the cosmic-ray energy density of these regions. These are the first limits to constrain gamma-ray emission in the multi-TeV energy range ($>$1 TeV) using passive high-galactic latitude GMCs. Assuming that the main gamma-ray production mechanism is due to proton-proton interaction, the upper limits are consistent with a cosmic-ray flux and energy density similar to that measured at Earth., Comment: 6 figures, 6 tables

Published
2021
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66. Evidence that Ultra-High-Energy Gamma Rays are a Universal Feature Near Powerful Pulsars

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Álvarez, J. D., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., Galván-Gámez, A., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Roh, Y. J., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna-Franco, J., Smith, A. J., Springer, R. W., Surajbali, P., Tanner, M., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Willox, E., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The highest-energy known gamma-ray sources are all located within 0.5 degrees of extremely powerful pulsars. This raises the question of whether ultra-high-energy (UHE; $>$ 56 TeV) gamma-ray emission is a universal feature expected near pulsars with a high spin-down power. Using four years of data from the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory, we present a joint-likelihood analysis of ten extremely powerful pulsars to search for UHE gamma-ray emission correlated with these locations. We report a significant detection ($>$ 3$\sigma$), indicating that UHE gamma-ray emission is a generic feature of powerful pulsars. We discuss the emission mechanisms of the gamma rays and the implications of this result. The individual environment that each pulsar is found in appears to play a role in the amount of emission., Comment: accepted by ApJL

Published
2021
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67. Interplanetary magnetic flux rope observed at ground level by HAWC

Author

Akiyama, S., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Colin-Farias, P., Cotti, U., Cotzomi, J., De la Fuente, E., de León, C., Hernandez, R. Diaz, Espinoza, C., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Joshi, V., Kieda, D., Kunde, G. J., Lara, A., Vargas, H. León, Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Nayerhoda, A., Nellen, L., Newbold, M., Niembro, T., Nieves-Chinchilla, T., Noriega-Papaqui, R., Pérez-Pérez, E. G., Preisser, L., Rho, C. D., Ryan, J., Salazar, H., Greus, F. Salesa, Sandoval, A., Springer, R. W., Torres, I., Ureña-Mena, F., Villaseñor, L., and Zepeda, A.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report the ground-level detection of a Galactic Cosmic-Ray (GCR) flux enhancement lasting $\sim$ 17 hr and associated with the passage of a magnetic flux rope (MFR) over the Earth. The MFR was associated with a slow Coronal Mass Ejection (CME) caused by the eruption of a filament on 2016 October 9. Due to the quiet conditions during the eruption and the lack of interactions during the interplanetary CME transport to the Earth, the associated MFR preserved its configuration and reached the Earth with a strong magnetic field, low density, and a very low turbulence level compared to the local background, thus generating the ideal conditions to redirect and guide GCRs (in the $\sim$ 8 to 60 GV rigidity range) along the magnetic field of the MFR. An important negative $B_Z$ component inside the MFR caused large disturbances in the geomagnetic field and a relatively strong geomagnetic storm. However, these disturbances are not the main factors behind the GCR enhancement. Instead, we found that the major factor was the alignment between the MFR axis and the asymptotic direction of the observer.

Published
2021
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68. Spectrum and Morphology of the Very-High-Energy Source HAWC J2019+368

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velàzquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistràn, T., Carramiñana, A., Casanova, S., Cotzomi, J., de León, S. Coutinõ, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Engel, K., Espinoza, C., Fraija, N., Garcia, D., García-González, J. A., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Huentemeyer, P., Jardin-Blicq, A., Joshi, V., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., López-Coto, R., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-Gonzàlez, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna-Franco, J., Smith, A. J., Springer, R. W., Surajbali, P., Tollefson, K., Torres, I., Turner, R., Urenã-Mena, F., Weisgarber, T., Willox, E., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The MGRO J2019+37 region is one of the brightest sources in the sky at TeV energies. It was detected in the 2 year HAWC catalog as 2HWC J2019+367 and here we present a detailed study of this region using data from HAWC. This analysis resolves the region into two sources: HAWC J2019+368 and HAWC J2016+371. We associate HAWC J2016+371 with the evolved supernova remnant CTB 87, although its low significance in this analysis prevents a detailed study at this time. An investigation of the morphology (including possible energy dependent morphology) and spectrum for HAWC J2019+368 is the focus of this work. We associate HAWC J2019+368 with PSR J2021+3651 and its X-ray pulsar wind nebula, the Dragonfly nebula. Modeling the spectrum measured by HAWC and Suzaku reveals a $\sim$7 kyr pulsar and nebula system producing the observed emission at X-ray and ${\gamma}$-ray energies., Comment: Submitted to ApJ: 13 pages, 10 figures

Published
2021

69. Evidence of 200 TeV photons from HAWC J1825-134

Author

Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fang, K., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kunde, G. J., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Serna, F., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Willox, E., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The Earth is bombarded by ultra-relativistic particles, known as cosmic rays (CRs). CRs with energies up to a few PeV (=10$^{15}$ eV), the knee in the particle spectrum, are believed to have a Galactic origin. One or more factories of PeV CRs, or PeVatrons, must thus be active within our Galaxy. The direct detection of PeV protons from their sources is not possible since they are deflected in the Galactic magnetic fields. Hundred TeV $\gamma$-rays from decaying $\pi^0$, produced when PeV CRs collide with the ambient gas, can provide the decisive evidence of proton acceleration up to the knee. Here we report the discovery by the High Altitude Water Cherenkov (HAWC) observatory of the $\gamma$-ray source, HAWC~J1825-134, whose energy spectrum extends well beyond 200 TeV without a break or cutoff. The source is found to be coincident with a giant molecular cloud. The ambient gas density is as high as 700 protons/cm$^3$. While the nature of this extreme accelerator remains unclear, CRs accelerated to energies of several PeV colliding with the ambient gas likely produce the observed radiation., Comment: Accepted for publication in ApJL

Published
2020
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74. A Realistic UAS Traffic Generation Tool to Evaluate and Optimize U-Space Airspace Capacity

Author

Raposo, Daniel, Carramiñana, David, Besada, Juan, Bernardos, Ana, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, García Bringas, Pablo, editor, Pérez García, Hilde, editor, Martínez de Pisón, Francisco Javier, editor, Martínez Álvarez, Francisco, editor, Troncoso Lora, Alicia, editor, Herrero, Álvaro, editor, Calvo Rolle, José Luis, editor, Quintián, Héctor, editor, and Corchado, Emilio, editor

Published
2023
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75. Managing Pandemics Through Agent-Based Simulation: A Case Study Based on COVID-19

Author

Alberte, César, Carramiñana, David, Bernardos, Ana M., Besada, Juan A., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, García Bringas, Pablo, editor, Pérez García, Hilde, editor, Martínez de Pisón, Francisco Javier, editor, Martínez Álvarez, Francisco, editor, Troncoso Lora, Alicia, editor, Herrero, Álvaro, editor, Calvo Rolle, José Luis, editor, Quintián, Héctor, editor, and Corchado, Emilio, editor

Published
2023
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77. High-altitude characterization of the Hunga pressure wave with cosmic rays by the HAWC observatory

Author

Alfaro, Ruben, Alvarez, César, Arteaga-Velázquez, Juan Carlos, Kollamparambil Paul, Arun Babu, Rojas, Daniel Avila, Ayala Solares, Hugo Alberto, Babu, Rishi, Belmont-Moreno, Ernesto, Brisbois, Chad, Caballero-Mora, Karen S., Capistrán, Tomás, Carramiñana, Alberto, Casanova, Sabrina, Chaparro-Amaro, Oscar, Cotti, Umberto, Cotzomi, Jorge, la Fuente, Eduardo De, Diaz Hernandez, Raquel, DuVernois, Michael A., Durocher, Mora, Díaz-Vélez, Juan Carlos, Engel, Kristi, Espinoza, Catalina, Fan, Kwok Lung, Fraija, Nissim, García-González, José Andrés, Garfias, Fernando, González, María Magdalena, Goodman, Jordan A., Harding, J. Patrick, Hernandez, Sergio, Huang, Dezhi, Hueyotl-Zahuantitla, Filiberto, Humensky, Thomas Brian, Hüntemeyer, Petra, Iriarte, Arturo, Joshi, Vikas, Kaufmann, Sarah, Kieda, David, Lara, Alejandro, Lee, Jason, León Vargas, Hermes, Linnemann, James T., Longinotti, Anna Lia, Luis-Raya, Gilgamesh, Malone, Kelly, Martinez, Oscar, Martínez-Castro, Jesús, Matthews, John A.J., Miranda-Romagnoli, Pedro, Morales-Soto, Jorge Antonio, Moreno, Eduardo, Nayerhoda, Amid, Nellen, Lukas, Noriega-Papaqui, Roberto, Omodei, Nicola, Pérez Araujo, Yunior, Pérez-Pérez, Eucario Gonzalo, Rho, Chang Dong, Rosa-González, Daniel, Ruiz-Velasco, Edna, Salazar, Humberto, Salazar-Gallegos, Daniel, Sandoval, Andres, Schneider, Michael, Serna-Franco, José, Smith, Andrew James, Son, Youngwan, Springer, Robert Wayne, Tibolla, Omar, Tollefson, Kirsten, Torres, Ibrahim, Torres-Escobedo, Ramiro, Turner, Rhiannon, Ureña-Mena, Fernando, Varela, Enrique, Villaseñor, Luis, Wang, Xiaojie, Willox, Elijah, Zhou, Hao, and de León, Cederik

Published
2024
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78. IF1 promotes oligomeric assemblies of sluggish ATP synthase and outlines the heterogeneity of the mitochondrial membrane potential

Author

Inés Romero-Carramiñana, Pau B. Esparza-Moltó, Sonia Domínguez-Zorita, Cristina Nuevo-Tapioles, and José M. Cuezva

Subjects
Biology (General), QH301-705.5
Abstract

Abstract The coexistence of two pools of ATP synthase in mitochondria has been largely neglected despite in vitro indications for the existence of reversible active/inactive state transitions in the F1-domain of the enzyme. Herein, using cells and mitochondria from mouse tissues, we demonstrate the existence in vivo of two pools of ATP synthase: one active, the other IF1-bound inactive. IF1 is required for oligomerization and inactivation of ATP synthase and for proper cristae formation. Immunoelectron microscopy shows the co-distribution of IF1 and ATP synthase, placing the inactive “sluggish” ATP synthase preferentially at cristae tips. The intramitochondrial distribution of IF1 correlates with cristae microdomains of high membrane potential, partially explaining its heterogeneous distribution. These findings support that IF1 is the in vivo regulator of the active/inactive state transitions of the ATP synthase and suggest that local regulation of IF1-ATP synthase interactions is essential to activate the sluggish ATP synthase.

Published
2023
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79. IF1 ablation prevents ATP synthase oligomerization, enhances mitochondrial ATP turnover and promotes an adenosine-mediated pro-inflammatory phenotype

Author

Sonia Domínguez-Zorita, Inés Romero-Carramiñana, Fulvio Santacatterina, Pau B. Esparza-Moltó, Carolina Simó, Araceli del-Arco, Cristina Núñez de Arenas, Jorge Saiz, Coral Barbas, and José M. Cuezva

Subjects
Cytology, QH573-671
Abstract

Abstract ATPase Inhibitory Factor 1 (IF1) regulates the activity of mitochondrial ATP synthase. The expression of IF1 in differentiated human and mouse cells is highly variable. In intestinal cells, the overexpression of IF1 protects against colon inflammation. Herein, we have developed a conditional IF1-knockout mouse model in intestinal epithelium to investigate the role of IF1 in mitochondrial function and tissue homeostasis. The results show that IF1-ablated mice have increased ATP synthase/hydrolase activities, leading to profound mitochondrial dysfunction and a pro-inflammatory phenotype that impairs the permeability of the intestinal barrier compromising mouse survival upon inflammation. Deletion of IF1 prevents the formation of oligomeric assemblies of ATP synthase and alters cristae structure and the electron transport chain. Moreover, lack of IF1 promotes an intramitochondrial Ca2+ overload in vivo, minimizing the threshold to Ca2+-induced permeability transition (mPT). Removal of IF1 in cell lines also prevents the formation of oligomeric assemblies of ATP synthase, minimizing the threshold to Ca2+-induced mPT. Metabolomic analyses of mice serum and colon tissue highlight that IF1 ablation promotes the activation of de novo purine and salvage pathways. Mechanistically, lack of IF1 in cell lines increases ATP synthase/hydrolase activities and installs futile ATP hydrolysis in mitochondria, resulting in the activation of purine metabolism and in the accumulation of adenosine, both in culture medium and in mice serum. Adenosine, through ADORA2B receptors, promotes an autoimmune phenotype in mice, stressing the role of the IF1/ATP synthase axis in tissue immune responses. Overall, the results highlight that IF1 is required for ATP synthase oligomerization and that it acts as a brake to prevent ATP hydrolysis under in vivo phosphorylating conditions in intestinal cells.

Published
2023
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80. Observation of the Galactic Center PeVatron beyond 100 TeV with HAWC

Author

A. Albert, R. Alfaro, C. Alvarez, A. Andrés, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, A. Bernal, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, C. de León, D. Depaoli, N. Di Lalla, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, J. C. Díaz-Vélez, K. Engel, T. Ergin, C. Espinoza, K. L. Fan, K. Fang, N. Fraija, S. Fraija, J. A. García-González, F. Garfias, H. Goksu, M. M. González, J. A. Goodman, S. Groetsch, J. P. Harding, S. Hernández-Cadena, I. Herzog, J. Hinton, D. Huang, F. Hueyotl-Zahuantitla, T. B. Humensky, P. Hüntemeyer, A. Iriarte, S. Kaufmann, D. Kieda, A. Lara, W. H. Lee, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, J. A. Montes, J. A. Morales-Soto, E. Moreno, M. Mostafá, M. Najafi, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, M. Osorio-Archila, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, D. Salazar-Gallegos, A. Sandoval, M. Schneider, G. Schwefer, J. Serna-Franco, A. J. Smith, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, E. Varela, X. Wang, Z. Wang, I. J. Watson, E. Willox, H. Wu, S. Yu, S. Yun-Cárcamo, and H. Zhou

Subjects
Galactic center, Gamma-rays, Ultra-high-energy cosmic radiation, Astrophysics, QB460-466
Abstract

We report an observation of ultrahigh-energy (UHE) gamma rays from the Galactic center (GC) region, using 7 yr of data collected by the High-Altitude Water Cherenkov (HAWC) Observatory. The HAWC data are best described as a point-like source (HAWC J1746-2856) with a power-law spectrum ( ${d}N/{d}E=\phi {\left(E/26\,\mathrm{TeV}\right)}^{\gamma }$ ), where γ = −2.88 ± 0.15 _stat − 0.1 _sys and ϕ = 1.5 × 10 ^−15 (TeV cm ^2 s) ^−1 $\pm {0.3}_{\mathrm{stat}}{\,}_{-{0.13}_{\mathrm{sys}}}^{+{0.08}_{\mathrm{sys}}}$ extending from 6 to 114 TeV. We find no evidence of a spectral cutoff up to 100 TeV using HAWC data. Two known point-like gamma-ray sources are spatially coincident with the HAWC gamma-ray excess: Sgr A* (HESS J1745-290) and the Arc (HESS J1746-285). We subtract the known flux contribution of these point sources from the measured flux of HAWC J1746-2856 to exclude their contamination and show that the excess observed by HAWC remains significant (>5 σ ), with the spectrum extending to >100 TeV. Our result supports that these detected UHE gamma rays can originate via hadronic interaction of PeV cosmic-ray protons with the dense ambient gas and confirms the presence of a proton PeVatron at the GC.

Published
2024
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81. HAWC and Fermi-LAT Detection of Extended Emission from the Unidentified Source 2HWC J2006+341

Author

Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Araya, M., Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Carramiñana, A., Casanova, S., Cotti, U., De la Fuente, E., de León, C., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Espinoza, C., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., López-Coto, R., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nellen, L., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Greus, F. Salesa, Sandoval, A., Schneider, M., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Willox, E., Zepeda, A., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The discovery of the TeV point source 2HWC J2006+341 was reported in the second HAWC gamma-ray catalog. We present a follow-up study of this source here. The TeV emission is best described by an extended source with a soft spectrum. At GeV energies, an extended source is significantly detected in Fermi-LAT data. The matching locations, sizes and spectra suggest that both gamma-ray detections correspond to the same source. Different scenarios for the origin of the emission are considered and we rule out an association to the pulsar PSR J2004+3429 due to extreme energetics required, if located at a distance of 10.8 kpc., Comment: 12 pages, 2 figures. To appear in ApJL

Published
2020
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82. A survey of active galaxies at TeV photon energies with the HAWC gamma-ray observatory

Author

Albert, A., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fleischhack, H., Fraija, N., Galván-Gámez, A., García, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernández, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martínez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Peisker, A., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Smith, A. J., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Willox, E., Zepeda, A., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The High Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) continuously detects TeV photons and particles within its large field-of-view, accumulating every day a deeper exposure of two thirds of the sky. We analyzed 1523~days of HAWC live data acquired over four and a half years, in a follow-up analysis of {138} nearby ($z<0.3$) active galactic nuclei from the {\em Fermi} 3FHL catalog culminating within $40^\circ$ of the zenith at Sierra Negra, the HAWC site. This search for persistent TeV emission used a maximum-likelihood analysis assuming intrinsic power-law spectra attenuated by pair production of gamma-ray photons with the extragalactic background light. HAWC clearly detects persistent emission from Mkn~421 and Mkn~501, the two brightest blazars in the TeV sky, at 65$\sigma$ and 17$\sigma$ level, respectively. {Weaker evidence for long-term emission is found for three other known very-high energy emitters:} the radiogalaxy M87 and the BL Lac objects VER~J0521+211 and 1ES~1215+303, the later two at $z\sim 0.1$. We find evidence for collective emission from the set of 30 previously reported very high-energy sources that excludes Mkn~421 and Mkn~501 with a random probability $\sim 10^{-5}$. Upper limits are presented for the sample under the power-law assumption and in the predefined (0.5-2.0), (2.0-8.0) and (8.0-32.0) TeV energy intervals., Comment: The HAWC survey of Fermi 3FHL AGNs: 30 pages, 13 figures. Submitted to the Astrophysical Journal

Published
2020
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83. Multimessenger Gamma-Ray and Neutrino Coincidence Alerts using HAWC and IceCube sub-threshold Data

Author

Solares, H. A. Ayala, Coutu, S., DeLaunay, J. J., Fox, D. B., Grégoire, T., Keivani, A., Krauß, F., Mostafá, M., Murase, K., Turley, C. F., Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Carramiñana, A., Casanova, S., Cotti, U., De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Espinoza, C., Fan, K. L., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Peisker, A., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Greus, F. Salesa, Sandoval, A., Smith, A. J., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Willox, E., Zepeda, A., Zhou, H., de León, C., Aartsen, M. G., Abbasi, R., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., Alispach, C., Amin, N. M., Andeen, K., Anderson, T., Ansseau, I., Anton, G., Argüelles, C., Auffenberg, J., Axani, S., Bagherpour, H., Bai, X., V., A. Balagopal, Barbano, A., Barwick, S. W., Bastian, B., Basu, V., Baum, V., Baur, S., Bay, R., Beatty, J. J., Becker, K. -H., Tjus, J. Becker, BenZvi, S., Berley, D., Bernardini, E., Besson, D. Z., Binder, G., Bindig, D., Blaufuss, E., Blot, S., Bohm, C., Böser, S., Botner, O., Böttcher, J., Bourbeau, E., Bourbeau, J., Bradascio, F., Braun, J., Bron, S., Brostean-Kaiser, J., Burgman, A., Buscher, J., Busse, R. S., Carver, T., Chen, C., Cheung, E., Chirkin, D., Choi, S., Clark, B. A., Clark, K., Classen, L., Coleman, A., Collin, G. H., Conrad, J. M., Coppin, P., Correa, P., Cowen, D. F., Cross, R., Dave, P., De Clercq, C., Dembinski, H., Deoskar, K., De Ridder, S., Desai, A., Desiati, P., de Vries, K. D., de Wasseige, G., de With, M., DeYoung, T., Dharani, S., Diaz, A., Dujmovic, H., Dunkman, M., Dvorak, E., Ehrhardt, T., Eller, P., Engel, R., Evenson, P. A., Fahey, S., Fazely, A. R., Felde, J., Fienberg, A., Filimonov, K., Finley, C., Franckowiak, A., Friedman, E., Fritz, A., Gaisser, T. K., Gallagher, J., Ganster, E., Garrappa, S., Gerhardt, L., Glauch, T., Glüsenkamp, T., Goldschmidt, A., Gonzalez, J. G., Grant, D., Griffith, Z., Griswold, S., Günder, M., Gündüz, M., Haack, C., Hallgren, A., Halliday, R., Halve, L., Halzen, F., Hanson, K., Hardin, J., Haungs, A., Hauser, S., Hebecker, D., Heereman, D., Heix, P., Helbing, K., Hellauer, R., Henningsen, F., Hickford, S., Hignight, J., Hill, C., Hill, G. C., Hoffman, K. D., Hoffmann, R., Hoinka, T., Hokanson-Fasig, B., Hoshina, K., Huang, F., Huber, M., Huber, T., Hultqvist, K., Hünnefeld, M., Hussain, R., In, S., Iovine, N., Ishihara, A., Jansson, M., Japaridze, G. S., Jeong, M., Jones, B. J. P., Jonske, F., Joppe, R., Kang, D., Kang, W., Kappes, A., Kappesser, D., Karg, T., Karl, M., Karle, A., Katz, U., Kauer, M., Kellermann, M., Kelley, J. L., Kheirandish, A., Kim, J., Kin, K., Kintscher, T., Kiryluk, J., Kittler, T., Klein, S. R., Koirala, R., Kolanoski, H., Köpke, L., Kopper, C., Kopper, S., Koskinen, D. J., Koundal, P., Kowalski, M., Krings, K., Krückl, G., Kulacz, N., Kurahashi, N., Kyriacou, A., Lanfranchi, J. L., Larson, M. J., Lauber, F., Lazar, J. P., Leonard, K., Leszczyńska, A., Li, Y., Liu, Q. R., Lohfink, E., Mariscal, C. J. Lozano, Lu, L., Lucarelli, F., Ludwig, A., Lünemann, J., Luszczak, W., Lyu, Y., Ma, W. Y., Madsen, J., Maggi, G., Mahn, K. B. M., Makino, Y., Mallik, P., Mancina, S., Mariş, I. C., Maruyama, R., Mase, K., Maunu, R., McNally, F., Meagher, K., Medici, M., Medina, A., Meier, M., Meighen-Berger, S., Merz, J., Meures, T., Micallef, J., Mockler, D., Momenté, G., Montaruli, T., Moore, R. W., Morse, R., Moulai, M., Muth, P., Nagai, R., Naumann, U., Neer, G., Nguyen, L. V., Niederhausen, H., Nowicki, S. C., Nygren, D. R., Pollmann, A. Obertacke, Oehler, M., Olivas, A., O'Murchadha, A., O'Sullivan, E., Pandya, H., Pankova, D. V., Park, N., Parker, G. K., Paudel, E. N., Peiffer, P., Heros, C. Pérez de los, Philippen, S., Pieloth, D., Pieper, S., Pinat, E., Pizzuto, A., Plum, M., Popovych, Y., Porcelli, A., Rodriguez, M. Prado, Price, P. B., Przybylski, G. T., Raab, C., Raissi, A., Rameez, M., Rauch, L., Rawlins, K., Rea, I. C., Rehman, A., Reimann, R., Relethford, B., Renschler, M., Renzi, G., Resconi, E., Rhode, W., Richman, M., Riedel, B., Robertson, S., Roellinghoff, G., Rongen, M., Rott, C., Ruhe, T., Ryckbosch, D., Cantu, D. Rysewyk, Safa, I., Herrera, S. E. Sanchez, Sandrock, A., Sandroos, J., Santander, M., Sarkar, S., Satalecka, K., Scharf, M., Schaufel, M., Schieler, H., Schlunder, P., Schmidt, T., Schneider, A., Schneider, J., Schröder, F. G., Schumacher, L., Sclafani, S., Seckel, D., Seunarine, S., Shefali, S., Silva, M., Smithers, B., Snihur, R., Soedingrekso, J., Soldin, D., Song, M., Spiczak, G. M., Spiering, C., Stachurska, J., Stamatikos, M., Stanev, T., Stein, R., Stettner, J., Steuer, A., Stezelberger, T., Stokstad, R. G., Strotjohann, N. L., Stürwald, T., Stuttard, T., Sullivan, G. W., Taboada, I., Tenholt, F., Ter-Antonyan, S., Terliuk, A., Tilav, S., Tomankova, L., Tönnis, C., Toscano, S., Tosi, D., Trettin, A., Tselengidou, M., Tung, C. F., Turcati, A., Turcotte, R., Ty, B., Unger, E., Elorrieta, M. A. Unland, Usner, M., Vandenbroucke, J., Van Driessche, W., van Eijk, D., van Eijndhoven, N., Vannerom, D., van Santen, J., Verpoest, S., Vraeghe, M., Walck, C., Wallace, A., Wallraff, M., Watson, T. B., Weaver, C., Weindl, A., Weiss, M. J., Weldert, J., Wendt, C., Werthebach, J., Whelan, B. J., Whitehorn, N., Wiebe, K., Wiebusch, C. H., Williams, D. R., Wills, L., Wolf, M., Wood, T. R., Woschnagg, K., Wrede, G., Wulff, J., Xu, X. W., Xu, Y., Yanez, J. P., Yoshida, S., Yuan, T., Zhang, Z., and Zöcklein, M.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The High Altitude Water Cherenkov (HAWC) and IceCube observatories, through the Astrophysical Multimessenger Observatory Network (AMON) framework, have developed a multimessenger joint search for extragalactic astrophysical sources. This analysis looks for sources that emit both cosmic neutrinos and gamma rays that are produced in photo-hadronic or hadronic interactions. The AMON system is running continuously, receiving sub-threshold data (i.e. data that is not suited on its own to do astrophysical searches) from HAWC and IceCube, and combining them in real-time. We present here the analysis algorithm, as well as results from archival data collected between June 2015 and August 2018, with a total live-time of 3.0 years. During this period we found two coincident events that have a false alarm rate (FAR) of $<1$ coincidence per year, consistent with the background expectations. The real-time implementation of the analysis in the AMON system began on November 20th, 2019, and issues alerts to the community through the Gamma-ray Coordinates Network with a FAR threshold of $<4$ coincidences per year., Comment: 14 pages, 5 figures, 3 tables

Published
2020
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84. 3HWC: The Third HAWC Catalog of Very-High-Energy Gamma-ray Sources

Author

Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., de León, S. Coutiño, De la Fuente, E., Hernandez, R. Diaz, Diaz-Cruz, L., Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Alonso, M. Fernández, Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., López-Coto, R., Malone, K., Marandon, V., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna, F., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tabachnick, E., Tollefson, K., Torres, I., Torres-Escobedo, R., Ukwatta, T. N., Ureña-Mena, F., Weisgarber, T., Werner, F., Willox, E., Zepeda, A., Zhou, H., de León, C., and Álvarez, J. D.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present a new catalog of TeV gamma-ray sources using 1523 days of data from the High Altitude Water Cherenkov (HAWC) observatory. The catalog represents the most sensitive survey of the Northern gamma-ray sky at energies above several TeV, with three times the exposure compared to the previous HAWC catalog, 2HWC. We report 65 sources detected at $\geq$ 5 sigma significance, along with the positions and spectral fits for each source. The catalog contains eight sources that have no counterpart in the 2HWC catalog, but are within $1^\circ$ of previously detected TeV emitters, and twenty sources that are more than $1^\circ$ away from any previously detected TeV source. Of these twenty new sources, fourteen have a potential counterpart in the fourth \textit{Fermi} Large Area Telescope catalog of gamma-ray sources. We also explore potential associations of 3HWC sources with pulsars in the ATNF pulsar catalog and supernova remnants in the Galactic supernova remnant catalog., Comment: 20 pages, 11 figures. Matches the version published in The Astrophysical Journal. See accompanying data release at https://data.hawc-observatory.org/datasets/3hwc-survey/index.php

Published
2020
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85. HAWC J2227+610 and its association with G106.3+2.7, a new potential Galactic PeVatron

Author

Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Diaz-Cruz, L., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Alonso, M. Fernández, Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Franco, J. Serna, Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tabachnick, E., Tanner, M., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Weisgarber, T., Zepeda, A., Zhou, H., de León, C., and Álvarez, J. D.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present the detection of VHE gamma-ray emission above 100 TeV from HAWC J2227+610 with the HAWC observatory. Combining our observations with previously published results by VERITAS, we interpret the gamma-ray emission from HAWC J2227+610 as emission from protons with a lower limit in their cutoff energy of 800 TeV. The most likely source of the protons is the associated supernova remnant G106.3+2.7, making it a good candidate for a Galactic PeVatron. However, a purely leptonic origin of the observed emission cannot be excluded at this time., Comment: Accepted for publication by ApJL

Published
2020
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86. Invariants of limit key polynomials

Author

Alberich-Carramiñana, Maria, Boix, Alberto F., Fernández, Julio, Guàrdia, Jordi, Nart, Enric, and Roé, Joaquim

Subjects
Mathematics - Algebraic Geometry
Abstract

Let $\nu$ be a valuation of arbitrary rank on the polynomial ring $K[x]$ with coefficients in a field $K$. We prove comparison theorems between MacLane-Vaqui\'e key polynomials for valuations $\mu\le\nu$ and abstract key polynomials for $\nu$. Also, some results on invariants attached to limit key polynomials are obtained. In particular, if $\operatorname{char}(K)=0$ we show that all limit key polynomials of unbounded continuous MacLane chains have numerical character equal to one.

Published
2020

87. Constraints on the Emission of Gamma Rays from M31 with HAWC

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Dichiara, S., Dingus, B. L., DuVernois, M. A., Engel, K., Espinoza, C., Fleischhack, H., Fraija, N., Galván-Gámez, A., García-Aguilar, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lee, W. H., Vargas, H. León, Longinotti, A. L., Luis-Raya, G., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Noriega-Papaqui, R., Peisker, A., Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rosa-González, D., Rosenberg, M., Rubenzahl, R., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tabachnick, E., Tibolla, O., Tollefson, K., Torres, I., Villaseñor, L., Wood, J., Yapici, T., Zepeda, A., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Cosmic rays, along with stellar radiation and magnetic fields, are known to make up a significant fraction of the energy density of galaxies such as the Milky Way. When cosmic rays interact in the interstellar medium, they produce gamma-ray emission which provides an important indication of how the cosmic rays propagate. Gamma rays from the Andromeda Galaxy (M31), located 785 kpc away, provide a unique opportunity to study cosmic-ray acceleration and diffusion in a galaxy with a structure and evolution very similar to the Milky Way. Using 33 months of data from the High Altitude Water Cherenkov Observatory, we search for TeV gamma rays from the galactic plane of M31. We also investigate past and present evidence of galactic activity in M31 by searching for Fermi Bubble-like structures above and below the galactic nucleus. No significant gamma-ray emission is observed, so we use the null result to compute upper limits on the energy density of cosmic rays $>10$ TeV in M31. The computed upper limits are approximately ten times higher than expected from the extrapolation of the Fermi LAT results., Comment: Accepted for publication in ApJ

Published
2020
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89. Effect of colchicine on perioperative atrial fibrillation and myocardial injury after non-cardiac surgery in patients undergoing major thoracic surgery (COP-AF): an international randomised trial

Author

Conen, David, Devereaux, PJ, Vincent, Jessica, Wang, Michael Ke, Wells, Jennifer R., Healey, Jeff S., Landoni, Giovanni, McIntyre, William F., Popova, Ekaterine, Sessler, Daniel I., Srinathan, Sadeesh K., Amir, Mohammed, Bangdiwala, Shrikant I., Bossard, Matthias, Chan, Matthew TV, Eikelboom, John W., Fleischmann, Edith, Jolly, Sanjit, Montes, Felix Ramón, Reimer, Cara, Schmartz, Denis, Wang, Chew Yin, Ofori, Sandra N., Blum, Steffen, Alvarez-Garcia, Jesus, Lo Bianco, Giuliana, Traquair, Hugh, Guerrero-Pinedo, Fernando Andres, Oleynick, Christopher, Meyre, Pascal B., Méndez-Zurita, Francisco, Chiarella-Redfern, Helene, Marcucci, Maura, Donati, Francesco, Gonzalez-Osuna, Aranzazu, Minervini, Fabrizio, Moreno Weidmann, Zoraida, Guerra-Ramos, Jose M., Dion, Gabriel, Ramos-Pachón, Anna, Borges, Flavia K., de Sa Boasquevisque, Danielle, Mosconi, Maria Giulia, Amarenco, Pierre, Mitchell, L. Brent, Wyse, George, Cheng, Davy, McAlister, Finlay A., Wells, George A., Baskaran, Geethan, Burns, Andrew T., Gennaccaro, Julia, Howe, Rosemary, Mastrangelo, Louise, Pettit, Shirley, Popovic, Michelle, Shahbaz, Subana, Tosh, Makayla, Zucchetto, Simona J., Heenan, Laura, Lee, Shun Fu, Li, Zhuoru, Xu, Lizhen, Kabon, Barbara, Hoetzenecker, Konrad, Schweiger, Thomas, Reiterer, Christian, Zotti, Oliver, Bsuchner, Paul, Hochreiter, Beatrix, Taschner, Alexander, Adamowitsch, Nikolas, Horvath, Katharina, Hantáková, Nicole, Bidgoli, Javad, Huybrechts, Isabelle, Cappeliez, Serge, Neary, John D., Shargall, Yaron, Tandon, Vikas, Finley, Christian, Agzarian, John, Hanna, Waël, Abdulrahman, Muammar, Lawrence, Kelly, Gregus, Krysten, Quraishi, Faraaz, Wikkerink, Spencer, Wallace, Christine, Prine, Merissa, Gregus, Emily, Hare, Jacqueline, Lombardo, Kristen, Fezia, Behashta, Columbus, Teresa, Rushton, Jacob, DuMerton, Deborah, Reid, Ken, Parlow, Joel, Chung, Wiley, Karizhenskaia, Maria, Malik, Aftab, Tanzola, Rob, Giles, Andrew, McLean, Sean R., McGuire, Anna, Lohser, Jens, Lim, Shirley, Grey, Rebecca, Yee, John, Grant, Kyle, Lee, Alex L., Choi, James J., Dewar, Leith R., Durkin, Christopher, Schisler, Travis, Hecht, Patrick, Hughes, Bevan, Kidane, Biniam, Liu, Richard, Tan, Lawrence, Gowing, Stephen, Buduhan, Gordon, Enns, Stephanie, Poole, Emma, Graham, Kristin, Dubik, Niina, Chin, Alex, Maziak, Donna E., Seely, Andrew JE, Gilbert, Sebastien, Villeneuve, P. James, Sundaresan, Sudhir, Gingrich, Molly, Fazekas, Anna, Bucciero, Kirby, Malthaner, Richard A., Lewis, Deb, Fortin, Dalilah, Qiabi, Mehdi, Nayak, Rahul, Plourde, Madelaine Marie, Haider, Tehmina, Murphy, Rowan, Sellers, Daniel, Donahoe, Laura, Lefebvre, Marco, Lanthier, Luc, Ko, Michael Augustine, Parente, David, Cheung, Victoria, Schieman, Colin, Bessissow, Amal, Wong, Randolph HL, Joynt, Gavin M., Lam, Carmen KM, Lau, Rainbow WH, Wan, Innes YP, Underwood, Malcolm J., Wu, William KK, Wong, Wai Tat, Choi, Gordon YS, Lee, Eva, Hui, Ka Yan, Fung, Beaker, Chan, Chee Sam, Ng, Fung Kei, Thung, Kin Hoi, Gutiérrez-Soriano, Laura, Castañeda, Laura Carmenza, Téllez, Luis Jaime, Ortiz-Ramirez, Lina Marcela, Baiardo-Redaelli, Martina, Belletti, Alessandro, Dieci, Elisa, Monaco, Fabrizio, Muriana, Piergiorgio, Nakhnoukh, Cristina, Novellis, Pierluigi, Turi, Stefano, Viscardi, Stefano, Veronesi, Giulia, Voltolini, Luca, Bongiolatti, Stefano, Salvicchi, Alberto, Gatteschi, Lavinia, Indino, Rossella, Tombelli, Simone, Ravasin, Alice, Salimbene, Ottavia, Rosboch, Giulio Luca, Balzani, Eleonora, Ceraolo, Edoardo, Neitzert, Luca, Brazzi, Luca, Londero, Francesco, Grossi, William, Massullo, Domenico, Fiorelli, Silvia, Margaritora, Stefano, Hashim, Shahrul Amry, Krishnasamy, Sivakumar, See, Woan Shiang, Nawaz, Mohammed Asghar, Bilal, Haris, Trujillo Reyes, Juan Carlos, Martínez-Téllez, Elisabeth, Belda Sanchis, Josep, Planas Canovas, Georgina, Libreros Niño, Alejandra, Parera Ruiz, Ana, Cladellas Gutierrez, Esther, Guarino, Mauro, Urrutia Cuchi, Gerard, Argilaga Nogues, Marta, Rovira Juan, Anna, Medina-Aedo, Melixa, Turró Castillejo, Mª Asunción, Gil Sanchez, Josep Mª, Araúz-Sarmiento, Ibell, Herranz Perez, Gracia, Chavarria Murillo, Stephania, Garcia-Osuna, Alvaro, Rodriguez-Arias, Ainhoa, Berga Garrote, Nuria, Martín Grande, Ascension, Parise Roux, Diego, Gajate Martín, Luis, De Pablo Pajares, Angélica, Candela Toha, Angel Manuel, Moreno Mata, Nicolás, Muñoz Molina, Gema, Caballero Silva, Usue, Cabañero, Alberto, Fra Fernandez, Sara, Cavestany García-Matres, Cristina, Simón, Luisa, Montenegro, Cristina, Pozo, Sergio, Gonzàlez-Tallada, Anna, González Suarez, Susana, Ribas Ball, Montserrat, De Nadal Clanchet, Miriam, Pérez Vélez, Javier, Cruz, Patrícia, Sánchez-Pedrosa, Guillermo, Duque, Patricia, González, Guillermo, Huerta, Luis, Rodríguez, Laura, Garutti, Ignacio, Ruiz-Villa, Laura, Martí-Ejarque, Maria del Mar, Gili-Bueno, Mireia, Maddio Vieyra, Ricardo Matias, Fibla, Juan J., Durán, Núria, de Temple Pla, Marina, Rodríguez-Fuster, Alberto, Bermejo-Martínez, Silvia, Carramiñana, Albert, Opitz, Isabelle, Etienne, Harry, Cata, Juan P., Guerra-Londono, Juan Jose, Rajaram, Ravi, Corrales, German, Vaporciyan, Ara, Mehran, Reza, Sepesi, Boris, Walsh, Garrett, Rice, David, Cukierman, Daniel S., Swisher, Stephen, Marchant, Bryan E., Harris, Lynne C., Cusson, Bruce D., Miller, Scott A., Ayad, Sabry, Araujo, Jorge, Marquez-Roa, Leonardo, Hofstra, Richard L., Wudel, Jr., Leonard J., Minear, Steven C., Teixeira, Camila, Pimentel, Mario, Popoff, Andrew M., Marsack, Kelly, Meehan, Sarah, Chen, Tzonghuei H., Essandoh, Michael, Poppers, Jeremy S., Ke Wang, Michael, Chan, Matthew T V, Cata, Juan P, McLean, Sean R, Srinathan, Sadeesh K, Reyes, Juan Carlos Trujillo, Grande, Ascension Martín, Tallada, Anna Gonzalez, Sessler, Daniel I, Maziak, Donna E, McIntyre, William F, Wong, Randolph H L, McGuire, Anna L, Roux, Diego Parise, Wells, Jennifer R, Ofori, Sandra N, Eikelboom, John W, Jolly, Sanjit S, Healey, Jeff S, and Devereaux, P J

Published
2023
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90. Multimessenger Gamma-Ray and Neutrino Coincidence Alerts Using HAWC and IceCube Subthreshold Data

Author

Solares, HA Ayala, Coutu, S, DeLaunay, JJ, Fox, DB, Grégoire, T, Keivani, A, Krauß, F, Mostafá, M, Murase, K, Turley, CF, Albert, A, Alfaro, R, Alvarez, C, Camacho, JR Angeles, Arteaga-Velázquez, JC, Arunbabu, KP, Rojas, D Avila, Belmont-Moreno, E, Brisbois, C, Caballero-Mora, KS, Carramiñana, A, Casanova, S, Cotti, U, De la Fuente, E, Hernandez, R Diaz, Dingus, BL, DuVernois, MA, Durocher, M, Díaz-Vélez, JC, Espinoza, C, Fan, KL, Fleischhack, H, Fraija, N, Galván-Gámez, A, Garcia, D, García-González, JA, Garfias, F, González, MM, Goodman, JA, Harding, JP, Hona, B, Huang, D, Hueyotl-Zahuantitla, F, Hüntemeyer, P, Iriarte, A, Jardin-Blicq, A, Joshi, V, Vargas, H León, Linnemann, JT, Longinotti, AL, Luis-Raya, G, Lundeen, J, Malone, K, Martinez, O, Martinez-Castellanos, I, Martínez-Castro, J, Matthews, JA, Miranda-Romagnoli, P, Moreno, E, Nellen, L, Newbold, M, Nisa, MU, Noriega-Papaqui, R, Peisker, A, Pérez-Pérez, EG, Rho, CD, Rosa-González, D, Salazar, H, Greus, F Salesa, Sandoval, A, Smith, AJ, Springer, RW, Tollefson, K, Torres, I, Torres-Escobedo, R, Ureña-Mena, F, Villaseñor, L, Weisgarber, T, Willox, E, Zepeda, A, Zhou, H, de León, C, Aartsen, MG, Abbasi, R, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Alispach, C, Amin, NM, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Argüelles, C, Auffenberg, J, Axani, S, Bagherpour, H, and Bai, X

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract

The High Altitude Water Cerenkov (HAWC) and IceCube observatories, through the Astrophysical Multimessenger Observatory Network (AMON) framework, have developed a multimessenger joint search for extragalactic astrophysical sources. This analysis looks for sources that emit both cosmic neutrinos and gamma rays that are produced in photohadronic or hadronic interactions. The AMON system is running continuously, receiving subthreshold data (i.e., data that are not suited on their own to do astrophysical searches) from HAWC and IceCube, and combining them in real time. Here we present the analysis algorithm, as well as results from archival data collected between 2015 June and 2018 August, with a total live time of 3.0 yr. During this period we found two coincident events that have a false-alarm rate (FAR) of

Published
2021

91. Influence of Balcony Thermal Bridges on Energy Efficiency of Dwellings in a Warm Semi-Arid Dry Mediterranean Climate

Author

Carlos Pérez-Carramiñana, Aurelio de la Morena-Marqués, Ángel Benigno González-Avilés, Nuria Castilla, and Antonio Galiano-Garrigós

Subjects
balcony thermal bridges, energy efficiency, hygrothermal performance, indoor thermal comfort, sustainable rehabilitation, warm semi-arid dry Mediterranean climate, Building construction, TH1-9745
Abstract

Thermal bridges significantly influence the energy performance of buildings. However, their impact varies depending on the type of thermal bridge, climate conditions, construction methodologies, and geometric characteristics of the building. On the Spanish Mediterranean coast, buildings with large balconies are predominant. Nevertheless, the Spanish energy efficiency regulations do not adequately specify the thermal bridges at the junctions of balconies with facades, leading to a lack of consideration for their influence in the majority of architectural projects. The objective of this study is to qualitatively and quantitatively assess the impact of such thermal bridges on the energy efficiency of buildings in a dry Mediterranean climate (BShs) within a warm semi-arid climate (BSh). As a case study, the influence of this thermal bridge is analyzed in two residential buildings located on the Mediterranean coast of southeastern Spain. The study also examines the modification of various construction parameters of this thermal bridge and determines the optimal design parameters to reduce its thermal transmittance. The results demonstrate that the energy needs caused by thermal bridges account for approximately 40% of the total annual energy needs of the studied residential buildings. Balcony thermal bridges account for 25% to 40% of the energy needs caused by all thermal bridges. The lack of differentiation in Spanish standards between balcony–facade and facade–slab edge junctions causes an imprecision in calculations equivalent to 12% of the total annual energy needs of dwellings. The novelty of this research lies in highlighting that current regulations and calculation programs need improvement to better characterize balcony thermal bridges and enhance the accuracy of building energy efficiency calculations.

Published
2024
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92. Differences between Daylighting and Electric Lighting in Affective Response

Author

Nuria Castilla, Vicente Blanca-Giménez, Carlos Pérez-Carramiñana, and Carmen Llinares

Subjects
daylighting, electric lighting, lighting, affective response, classroom design, subjective assessment, Building construction, TH1-9745
Abstract

Humans are spending more time indoors than ever due to urbanisation and industrialisation, leading to higher electricity consumption in lighting systems. Recent research has demonstrated the significance of maintaining a balance between daylight and electric light to create an ideal learning environment that can significantly impact students’ academic performance. The objective of this study is to analyse the changes in students’ emotional response depending on the type of lighting in the classroom—whether it is daylight, electric light, or a combination of both. A field study was conducted with 521 university students to assess their affective response to the lighting environment inside their classroom. The results show that students prefer a Clear-efficient lighting environment for writing–reading tasks and a Soft-calm atmosphere for using electronic devices. For the paying attention tasks, a combination of daylighting and electric lighting is determined to be the best solution, while for the tasks of discussing–teamwork, students prefer daylighting. Daylighting is found to be the only lighting option that students like. Despite this, students still consider electric lighting and the combination of daylight and electric light adequate for a classroom. The findings of this study may help educators and designers create learning spaces that promote a positive and stimulating student environment by understanding the relationship between the lighting environment and students’ affective responses.

Published
2024
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93. The Influence of Visitors on Heritage Conservation: The Case of the Church of San Juan del Hospital, Valencia, Spain

Author

Antonio Galiano-Garrigós, Concepción López-González, Jorge García-Valldecabres, Carlos Pérez-Carramiñana, and Stephen Emmitt

Subjects
heritage, carbon dioxide, tourist capacity, heritage conservation, preventive maintenance, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

One of the greatest challenges in heritage management is to find a balance between the demands of visitor access and heritage conservation. The income generated prevents decay and benefits the conservation of buildings. At the same time, cultural tourism can accelerate the deterioration of buildings from increased use and an increase in agents harmful to conservation. This unique research analyses the influence of building use at San Juan del Hospital, the oldest church in the city of Valencia. Its architectural characteristics and the climate of the city mean that visits to the building put the conservation of its heritage assets at risk. Monitoring data from the summer months were put into a digital twin generated from a heritage building information model (HBIM), and the modelling of visitor numbers and the impact on indoor environmental quality was conducted. Monitoring and simulations confirmed that visitor numbers need to be reduced or mechanical conditioning systems need to be installed to prevent damage to the heritage artefacts within the building. This research provides building managers with information to make informed decisions about the preventive maintenance of heritage buildings. This research also demonstrates for the first time the value of using monitoring and a digital twin for conservation management.

Published
2024
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94. Constraints on Lorentz invariance violation from HAWC observations of gamma rays above 100 TeV

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., López-Coto, R., Malone, K., Marinelli, S. S., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Pérez-Pérez, E. G., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tabachnick, E., Tanner, M., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Weisgarber, T., Yodh, G., Zepeda, A., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Due to the high energies and long distances to the sources, astrophysical observations provide a unique opportunity to test possible signatures of Lorentz invariance violation (LIV). Superluminal LIV enables the decay of photons at high energy. The High Altitude Water Cherenkov (HAWC) Observatory is among the most sensitive gamma-ray instruments currently operating above 10 TeV. HAWC finds evidence of 100 TeV photon emission from at least four astrophysical sources. These observations exclude, for the strongest of the limits set, the LIV energy scale to $2.2\times10^{31}$ eV, over 1800 times the Planck energy and an improvement of 1 to 2 orders of magnitude over previous limits., Comment: Accepted for publication in Physical Review Letters

Published
2019
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95. Constraining the Local Burst Rate Density of Primordial Black Holes with HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., De la Fuente, E., de León, C., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K. L., Espinoza, C., Fleischhack, H., Fraija, N., Galván-Gámez, A., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., López-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Peisker, A., Pérez-Pérez, E. G., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Sinnis, G., Smith, A. J., Springer, R. W., Tabachnick, E., Tanner, M., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Weisgarber, T., Wood, J., Zepeda, A., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract

Primordial Black Holes (PBHs) may have been created by density fluctuations in the early Universe and could be as massive as $> 10^9$ solar masses or as small as the Planck mass. It has been postulated that a black hole has a temperature inversely-proportional to its mass and will thermally emit all species of fundamental particles via Hawking Radiation. PBHs with initial masses of $\sim 5 \times 10^{14}$ g (approximately one gigaton) should be expiring today with bursts of high-energy gamma radiation in the GeV--TeV energy range. The High Altitude Water Cherenkov (HAWC) Observatory is sensitive to gamma rays with energies of $\sim$300 GeV to past 100 TeV, which corresponds to the high end of the PBH burst spectrum. With its large instantaneous field-of-view of $\sim 2$ sr and a duty cycle over 95%, the HAWC Observatory is well suited to perform an all-sky search for PBH bursts. We conducted a search using 959 days of HAWC data and exclude the local PBH burst rate density above $3400~\mathrm{pc^{-3}~yr^{-1}}$ at 99% confidence, the strongest limit on the local PBH burst rate density from any existing electromagnetic measurement., Comment: Corresponding authors: K.L. Engel & A. Peisker. 13 pages, 5 figures

Published
2019
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96. Contributions of the LAGO Collaboration to the 36th ICRC

Author

Alberto, A., Alvarez, W., Ancari, L., Uzieda, M. Andrade, Arceo, R., Areso, O., Arnaldi, L. H., Asorey, H., Audelo, M., Berazaín, E., Bertou, X., Bonilla-Rosales, M. J., Caballero-Mora, K. S., Calderón-Ardila, R., García, C. A. Calle, Campelo, J., Campos-Fauth, A., Cando, J., Carramiñana, A., Carrasco-Licea, E., Carrera, E., Castromonte-Flores, C., Cazar, D., Cogollo, D., Conde-Sanchez, R., Cotzomi, J., Dasso, S., De-Castro, A., Echiburú, M., García, L. G., Garibay-Orellana, A., González, M., Grisales-Casadiegos, J., Guachalla, N., Gulisano, A. M., Guzmán, R., Berisso, M. Gómez, Helo, J. C., Hueyotl-Zahuantitla, F., Hurtado, J. S., Jaimes-Motta, A., López, J., Manriquez, D., Bravo, Oscar Martínez, Martínez-Méndez, A., Meza, J. J. Masías, Mayo-García, R., Mijangos, L. G., Miranda, P. P., Montes, E., Morales, I. R., Morales-Olivares, O. G., Moreno, E., Muñoz, P., Navarro, F., Nina, C., Núñez, L. A., Otiniano-Ormachea, L., Paye, P., Pereira, M., Perez, H., Peña-Rodríguez, J., Pinillos, L. P., Pisco-Guabave, J., Ponce-Lancho, E., Pérez-Sánchez, L. R., Ergueta, M. S. Raljevic, Ramelli, M., Bretel, H. M. Rivera, Rosero, C., Rubio-Montero, A. J., Sacahui, J. R., Salazar, H., Samanés-Cárdenas, J., Santos, E., Sarmiento-Cano, C., Sidelnik, I., Haro, M. Sofo, Vasquez, M. A. Subieta, Suárez-Durán, M., Ticona, M., Ordoñez, R. R. Ticona, Peralta, R. D. Ticona, Vega, A., Vega, P., Vega-Martínez, J., Vesga-Ramirez, A., Vitoreti, D., Vásquez, N., Vásquez-Ramírez, A., Zepeda, A., H, Hugo de León, and Alvarez, C.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The LAGO (Latin American Giant Observatory) observatory is an experiment that spans over Latin America in a wide range of latitudes that gives different rigidity cut offs for the enter of cosmic rays in the atmosphere. The motivation of the Observatory is to study atmospheric radiation and space weather through the measurement of the secondary emission of low energy cosmic rays at ground level using Water Cherenkov Detectors (WCD). This work presents the contributions of the LAGO collaboration to the 2019 36th ICRC., Comment: International Cosmic Ray Conference 2019

Published
2019

97. Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC

Author

HAWC Collaboration, Abeysekara, A. U., Albert, A., Alfaro, R., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Dichiara, S., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., López-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Peisker, A., Pérez-Pérez, E. G., Pretz, J., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tabachnick, E., Tanner, M., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Villaseñor, L., Weisgarber, T., Wood, J., Yapici, T., Zhang, H., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from the High Altitude Water Cherenkov (HAWC) Observatory, a wide field-of-view observatory capable of detecting gamma rays up to a few hundred TeV. Nine sources are observed above 56 TeV, all of which are likely Galactic in origin. Three sources continue emitting past 100 TeV, making this the highest-energy gamma-ray source catalog to date. We report the integral flux of each of these objects. We also report spectra for three highest-energy sources and discuss the possibility that they are PeVatrons., Comment: Accepted by Physical Review Letters

Published
2019
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98. HAWC Contributions to the 36th International Cosmic Ray Conference (ICRC2019)

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Álvarez, J. D., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Barber, A. S., Gonzalez, J. Becerra, Belmont-Moreno, E., BenZvi, S. Y., Berley, D., Braun, J., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti12, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Hernandez, R. Diaz, Diaz-Cruz, L., Díaz-Vélez, J. C., Dichiara, S., Dingus, B. L., DuVernois, M. A., Ellsworth, R. W., Engel, K., Enríquez-Rivera, O., Espinoza, C., Alonso, M. Fernández, Fick, B., Fiorino, D. W., Fleischhack, H., Fraija, N., Galván-Gámez, A., García-González, J. A., Garcia-Luna, J. L., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hui, C. M., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Kunde, G. J., Lara, A., Lauer, R. J., Lee, W. H., Lennarz, D., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., López-Coto, R., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A. J., McEnery, J., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Ryan, J., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Arroyo, M. Seglar, Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tabachnick, E., Taboada, I., Tanner, M., Tollefson, K., Torres, I., Torres-Escobedo, R., Ukwatta, T. N., Vianello, G., Villaseñor, L., Weisgarber, T., Werner, F., Westerhoff, S., Wisher, I. G., Wood, J., Yapici, T., Yodh, G. B., Younk, P. W., Zepeda, A., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract

List of proceedings from the HAWC Collaboration presented at the 36th International Cosmic Ray Conference, 24 July - 1 August 2019, Madison, Wisconsin, USA., Comment: List of proceedings from the HAWC Collaboration presented at ICRC2019. Corrected typos in the index of the previous version. Follow the "HTML" link to access the list

Published
2019

99. Spectral analysis of the blazars Markarian 421 and Markarian 501 with the HAWC Gamma-Ray Observatory

Author

de León, Sara Coutiño, Alonso, Alberto Carramiñana, Rosa-González, Daniel, and Longinotti, Anna Lia

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory surveys the very high energy sky in the $\sim300$ to 100 TeV energy range and has detected two high-synchrotron-peaked BL Lacertae objects, Markarian 421 and Markarian 501 in a period of time of 837 days between June 2015 and December 2017. In this work, we present the detailed time-average spectral analysis. Using an extragalactic background light model, we address the difference in the intrinsic spectral properties between the two blazars above 1 TeV, preliminary results show that the intrinsic spectrum of Mrk 421 is better described by a power-law with an exponential energy cut-off function with photon index $\alpha_{421}=2.22\pm0.10$ and energy cut-off $Ec_{421}=5.24\pm1.02$ TeV, and for Mrk 501 the intrinsic spectrum is well described by a power-law with spectral index $\alpha_{501}=2.40\pm0.06$, without requiring an energy cut-off.

Published
2019

100. A survey of Active Galaxies with the HAWC Gamma-ray Observatory

Author

Carramiñana, Alberto, González, Daniel Rosa, de León, Sara Coutiño, and Longinotti, Anna Lia

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The High Altitude Water Cherenkov Gamma-Ray Observatory has been accumulating a progressively deeper exposure of the TeV sky since its inauguration in March 2015. Located at geographical latitude $+19^\circ$N, HAWC has been able to perform a deep and unbiased survey of two thirds of the sky. We analyzed three years of HAWC data searching for long term persistent emission from a redshift limited ($z\leq 0.3$) sample of active galactic nuclei drawn from the {\it Fermi}-LAT 3FHL catalog. The HAWC dataset confirms the high significance detection of the two nearest BL Lac objects, \mbox{Mrk 421} and \mbox{Mrk 501}, and sets limits for the rest of the sample, down to integrated photon fluxes of order $N(>0.5~{\rm TeV})\lesssim 10^{-12}\,\rm cm^{-2}s^{-1}$. We present and discuss some of the results of this survey, focusing on individual objects of particular interest., Comment: Contribution to the International Cosmic Ray Conference ICRC 2019. 8 pages, 3 figures. A couple of errors in Table 1 have been corrected

Published
2019

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