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Combined searches for dark matter in dwarf spheroidal galaxies observed with the MAGIC telescopes, including new data from Coma Berenices and Draco

2021; Elsevier BV; Volume: 35; Linguagem: Inglês

10.1016/j.dark.2021.100912

2212-6864

V. A. Acciari, Stefano Ansoldi, L. A. Antonelli, A. Arbet Engels, Manuel Artero, Katsuaki Asano, Dominik Baack, A. Babić, Andrés Baquero, U. Barres de Almeida, J. A. Barrio, Ivana Batković, J. Becerra González, W. Bednarek, Lorenzo Bellizzi, E. Bernardini, M. Bernardos, A. Berti, Jürgen Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, H. Bökenkamp, G. Bonnoli, Ž. Bošnjak, G. Busetto, R. Carosi, Giovanni Ceribella, M. Cerruti, Yating Chai, A. Chilingarian, S. Cikota, S. M. Colak, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, Giacomo D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, C. Delgado Mendez, Davide Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espiñeira, D. Dominis Prester, Alice Donini, D. Dorner, M. Doro, D. Elsäesser, V. Fallah Ramazanı, Alicia Fattorini, M. V. Fonseca, L. Font, C. Fruck, Satoshi Fukami, R. J. Garcı́a López, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, Paweł Gliwny, N. Godinović, Jarred Gershon Green, D. Green, D. Hadasch, A. Hahn, Lea Heckmann, J. Herrera, John Hoang, Dario Hrupec, Moritz Hütten, Tomohiro Inada, Kazuma Ishio, Y. Iwamura, Irene Jiménez Martínez, Jenni Jormanainen, L. Jouvin, Marie Karjalainen, D. Kerszberg, Yukiho Kobayashi, H. Kubo, J. Kushida, A. Lamastra, A. La Barbera, F. Leone, E. Lindfors, Lena Linhoff, S. Lombardi, F. Longo, R. López-Coto, Marcos López, A. López-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martı́nez, D. Mazin, Stefano Menchiari, S. Mender, S. Mičanović, Davide Miceli, Tjark Miener, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, Daniel Morcuende, V. Moreno, E. Moretti, V. Neustroev, Cosimo Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, S. Nozaki, Yoshiki Ohtani, Tomohiko Oka, Jorge Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, Lovro Pavletić, Pablo Peñil, M. Persic, Marine Pihet, P. G. Prada Moroni, E. Prandini, Chaitanya Priyadarshi, Ivica Puljak, W. Rhode, M. Ribó, J. Rico, Chiara Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, Francesco Gabriele Saturni, Bernd Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, I. Šnidarić, D. Sobczyńska, Alessia Spolon, A. Stamerra, Jelena Strišković, D. Strom, M. Strzys, Y. Suda, T. Surić, Mitsunari Takahashi, Ryuji Takeishi, F. Tavecchio, P. Temnikov, T. Terzić, M. Teshima, Luca Tosti, Stefano Truzzi, Antonio Tutone, Santiago Ubach, Juliane van Scherpenberg, G. Vanzo, M. Vázquez Acosta, Sofia Ventura, V. Verguilov, C. Vigorito, V. Vitale, Ievgen Vovk, Martin Will, Carolin Wunderlich, Darko Zarić,

Particle Detector Development and Performance

Milky Way dwarf spheroidal galaxies (dSphs) are among the best candidates to search for signals of dark matter annihilation with Imaging Atmospheric Cherenkov Telescopes, given their high mass-to-light ratios and the fact that they are free of astrophysical gamma-ray emitting sources. Since 2011, MAGIC has performed a multi-year observation program in search for Weakly Interacting Massive Particles (WIMPs) in dSphs. Results on the observations of Segue 1 and Ursa Major II dSphs have already been published and include some of the most stringent upper limits (ULs) on the velocity-averaged cross-section 〈σannv〉 of WIMP annihilation from observations of dSphs. In this work, we report on the analyses of 52.1 h of data of Draco dSph and 49.5 h of Coma Berenices dSph observed with the MAGIC telescopes in 2018 and in 2019 respectively. No hint of a signal has been detected from either of these targets and new constraints on the 〈σannv〉 of WIMP candidates have been derived. In order to improve the sensitivity of the search and reduce the effect of the systematic uncertainties due to the J-factor estimates, we have combined the data of all dSphs observed with the MAGIC telescopes. Using 354.3 h of dSphs good quality data, 95% CL ULs on 〈σannv〉 have been obtained for 9 annihilation channels. For most of the channels, these results reach values of the order of 10−24cm3/s at ∼1 TeV and are the most stringent limits obtained with the MAGIC telescopes so far.