Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory

作者：K. Abe, Shinsuke Abe, J. Abhir, A. Abhishek, F. Acero, A. Acharyya, R. Adam, Arnau Aguasca-Cabot, I. Agudo, Alejandra Aguirre-Santaella, Jorge Alfaro, R. Alfaro, Cyril Martin Alispach, Rafael Alves Batista, J.-P. Amans, Elena Amato, G. Ambrosi, D. Ambrosino, Filippo Ambrosino, Luis F. Angel, L. A. Antonelli, C. Aramo, Cornelia Arcaro, K. Asano, Y. Ascasíbar, Luiz Augusto Stuani, Michael Backes, Csaba Balázs, Matteo Balbo, Andrés Baquero, V. Barbosa Martins, J. A. Barrio, L. Barrios-Jiménez, C. Bartolini, Pedro Ivo Batista, Ivana Batković, R. Batzofin, Jordi Gonzàlez, Geoff Beck, J. Becker Tjus, W. Benbow, D. Berge, E. Bernardini, J. Bernete, A. Berti, B. Bertucci, Vasyl Beshley, Pooja Bhattacharjee, Sudip Bhattacharyya, C. Bigongiari, A. Biland, E. Bissaldi, O. Blanch, Jiří Blažek, G. Bonnoli, Alberto Bonollo, Ž. Bošnjak, E. Bottacini, M Böttcher, Torsten Bringmann, E. Bronzini, Robert Brose, Giulia Brunelli, Julio Sáez, M. Bunse, L. Burmistrov, Michael Burton, P. Calisse, A. Campoy-Ordaz, Brandon Khan Cantlay, Giulio Capasso, Anderson Caproni, R. Capuzzo‐Dolcetta, P. A. Caraveo, Sami Caroff, R. Carosi, E. Carquín, M-S Carrasco, E. Cascone, G. Castignani, A.J. Castro-Tirado, Davide Cerasole, M. Cerruti, A. Cerviño Cortínez, P. M. Chadwick, Yating Chai, S. Chaty, A. Chen, Y. Chen, M. Chernyakova, A. Chiavassa, G. Chon, J. Chudoba, Gloria Maria Cicciari, A. Cifuentes, Carlos H. Coimbra-Araújo, Mirko Colapietro, Vito Conforti, J.L Contreras, B. Cornejo, J. Cortina, Alessandro Costa, H. Costantini, Garret Cotter, P. I. Cristofari, Omar Cuevas, Z. Curtis-Ginsberg, Guido D’Amico, F. D’Ammando, L. P. David, F. Dazzi, A de Angelis, M. de Bony de Lavergne, F. De Frondat Laadim, E. M. de Gouveia Dal Pino, B. De Lotto, M. de Naurois, G De Palma, V de Souza, R. Del Burgo, L. del Peral, M. V. del Valle, C Delgado, D. della Volpe, Davide Depaoli, T. Di Girolamo, Ambra Di Piano, F. Di Pierro, R. Di Tria, L. Di Venere, Sebastian Diebold, A. Dinesh, J. I. Djuvsland, A. Donini, Julien Dörner, M. Doro, Chaimongkol Duangchan, L. Ducci, Vikram V. Dwarkadas, Jan Ebr, Christopher Eckner, K. Egberts, D Elsässer, G. Emery, C Escañuela Nieves, Pedro Escárate, M. Escobar Godoy, P. Esposito, S. Ettori, D. Falceta-Gonçalves, E. Fedorova, S. Fegan, Q. Feng, Gilles Ferrand, F. Ferrarotto, E. Fiandrini, A. Fiaßon, M. D. Filipović, V. Fioretti, L. Foffano, G. Fontaine, F. Frías García-Lago, Y. Fukazawa, Y. Fukui, A. Furniss, Giorgio Galanti, Gaspar Galaz, S. Gallozzi, V. Gammaldi, S. García Soto, Markus Garczarczyk, C. Gasbarra, D Gasparrini, M. Gaug, S. Germani, A. Ghalumyan, F. Gianotti, J. G. Giesbrecht Paiva, N Giglietto, F. Giordano, Rogério Giuffrida, J-F Glicenstein, Jonas Glombitza, P. Goldoni, Juan Manuel González, Jaziel G. Coelho, T. Gradetzke, Jonathan Granot, Lucas Gréaux, David C. Green, Jarred Gershon Green, G. Grolleron, Leticia Guedes, O. Gueta, D. Hadasch, P. Hamal, W. Hanlon, Satoshi Hara, Violet M. Harvey, T. Hassan, K. Hayashi, B. A. Hess, Lea Heckmann, M. Heller, Nagisa Hiroshima, B Hnatyk, R. Hnatyk, D. Hoffmann, W. Hofmann, D. Horan, Pavel Horváth, D. Hrupec, Shahid Hussain, M. Iarlori, Tomohiro Inada, Federico Incardona, Shosuke Inoue, Yoshiyuki Inoue, Fabio Iocco, A. Iuliano, Jahanvi, M. Jamrozy, Petr Janeček, F. Jankowsky, Christian Jarnot, I. Jaroschewski, P. Jean, Irene Jiménez Martínez, W. Jin, Jakub Jurýšek, O. Kalekin, V. Karas, J. Kataoka, S. Kaufmann, Demosthenes Kazanas, Ténéman Keita, D Kerszberg, D. Kieda, R. Kissmann, W. Kluźniak, Kazunori Kohri, Darko Kolar, Nu. Komin, Paula Kornecki, G. Kowal, Hiromi Kubo, J. Kushida, A. La Barbera, N. La Palombara, Bastien Lacave, Miguel J. A. Láinez, A. Lamastra, J. Lapington, Sanja Lazarević, J-P Lenain, F. Leone, E. Leonora, Yijia Li, E. Lindfors, M. Linhoff, S. Lombardi, Francesco Longo, R. López-Coto, M López-Moya, A. López-Oramas, S. Loporchio, J. J. Lozano Bahilo, H. Luciani, Pedro L. Luque‐Escamilla, E. Lyard, Oscar Macías, Jonathan Mackey, P. Majumdar, D. Malyshev, Dušan Mandát, S. Mangano, Giulio Manicò, A. Marchetti, M. Mariotti, I. Márquez, G. Marsella, Diego Dominguez, G. Martı́nez, M. Martínez, O. Martı́nez, D. Mazin, Alexandre José Tuoto Silveira Mello, J. Gallego, S. Menon, S. Mereghetti, D M-A Meyer, Mervin Meyer, D. Miceli, M. Miceli, Miltiadis Michailidis, T. Miener, J. M. Miranda, A. Mitchell, M Molero, Cesare Molfese, M Molina Delicado, E. Molina, T. Montaruli, A. Moralejo, A. Moreno Ramos, A Morselli, E. Moulin, V Moya Zamanillo, Kevin Munari, T. Murach, Adam Muraczewski, H. Muraishi, T. Nakamori, Rodrigo Nemmen, Jurandyr Pimentel Neto, J. Niemiec, D. Nieto, M. Nievas Rosillo, M. Nikołajuk, K. Nishijima, Kentaro Noda, Dalibor Nosek, V Novotny, S. Nozaki, A. Okumura, J. F. Olive, R. A. Ong, R. Orito, M. Orlandini, E Orlando, S. Orlando, Jorge Otero-Santos, I Oya, M. O. Moghadam, A. Pagliaro, M Palatiello, A. K. Pandey, Gabriele Panebianco, D. Paneque, F R Pantaleo, R. Paoletti, J. M. Paredes, N. Parmiggiani, B. Patricelli, M. Pech, Mario Pecimotika, M. Peresano, Alejandro Pérez Aguilera, Judit Pérez-Romero, Giada Peron, F. Perrotta, M Persic, O. Petruk, F Pfeifle, E. Pietropaolo, Liam Pinchbeck, Fabio Pintore, G. Pirola, C. Pittori, F. Podobnik, M. Pohl, V Poireau, Vincent Pollet, G. Ponti, C. González, E. Prandini, G. Principe, M. Prouza, E. Pueschel, G. Pühlhofer, M. L. Pumo, A. Quirrenbach, S. Rainò, R Rando, Sandro Recchia, Maxime Regeard, A. Reimer, O Reimer, Igor Reis, Andreas Reisenegger, W. Rhode, M. Ribó, Cláudio Ricci, T. Richtler, J. Rico, Frank Rieger, L. Riitano, Carlos Ríos-Deidán, V. Rizi, E. Roache, Gonzalo Rodríguez-Fernández, M. D. Rodríguez-Friás, Juan José Rodríguez‐Vázquez, P. Romano, G. Romeo, J. Rosado, Alberto Rosales de León, Gavin Rowell, Abhradeep Roy, B. Rudak, Arshia Ruina, E. Ruiz-Velasco, Farinaldo S. Queiroz, I. Sadeh, L. Saha, H. Salzmann, M. Sánchez‐Conde, Pierluca Sangiorgi, Hirohito Sano, R. Santos-Lima, Vincenzo Sapienza, S. Sarkar, Francesco Gabriele Saturni, Salvatore Savarese, V. Savchenko, Andres Scherer, F. Schiavone, Pietro Schipani, F. Schüßler, D. Sengupta, O. Sergijenko, V. Sguera, H. Siejkowski, Gabriella Silvestri, A. Simongini, Clarissa Siqueira, Vitalii Sliusar, Isabella Sofia, H. Sol, Daniele Spiga, Sebastiano Spinello, A. Stamerra, S. Stanič, Tomasz Starecki, R. L. C. Starling, Th. Stolarczyk, Y. Suda, Hiroyasu Tajima, Mari Takahashi, Ryuji Takeishi, S.J Tanaka, Luis Tejedor, M. Teshima, V. Testa, W. W. Tian, L. Tibaldo, O. Tibolla, S. J. Tingay, Francesco Tombesi, D. Tonev, F. Torradeflot, D. F. Torres, N. F. H. Tothill, A. Tramacere, P. Trávnı́ček, A. Trois, Stefano Truzzi, Antonio Tutone, Martin Vacula, C. van Eldik, J. Vandenbroucke, V.P. Vassiliev, M. Vázquez Acosta, M. Vecchi, S. Ventura, S. Vercellone, G. Verna, Ilaria Viale, A. Viana, N. Viaux Maira, Alessandro Vigliano, Jonatan Vignatti, C. Vigorito, Elisa Visentin, V. Vitale, V. Voitsekhovskyi, S. Vorobiov, Georgios Gerasimos Voutsinas, R. Walter, Maneenate Wechakama, Martin White, A. Wierzcholska, Frederik Wohlleben, Francesco Xotta, Ryo Yamazaki, Yongqiang Yao, T. Yoshikoshi, D. Zavrtanik, M. Zavrtanik, A. Zech, W. Zhang, В. И. Жданов, Miha Živec, Jaume Zuriaga-Puig · 发表于：Monthly Notices of the Royal Astronomical Society · 年份：2025 · DOI：10.1093/mnras/staf1798 · 被引用次数：3 · 研究领域：Dark Matter and Cosmic Phenomena、Radio Astronomy Observations and Technology、Astronomy and Astrophysical Research

ABSTRACT The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the search for indirect dark matter (DM) signatures in the GeV-to-TeV $\gamma$-ray range owing to their lack of astrophysical $\gamma$-ray background. We present forecasts of the sensitivity of the forthcoming Cherenkov Telescope Array Observatory (CTAO) to annihilating or decaying DM signals in these targets. An original selection of candidates is performed from the current catalogue of known objects, including both classical and ultrafaint dSphs. For each, the expected DM content is derived using the most comprehensive photometric and spectroscopic data available, within a consistent framework of analysis. This approach enables the derivation of novel astrophysical factor profiles for indirect DM searches, which are compared with results from the literature. From an initial sample of 64 dSphs, eight promising targets are identified – Draco I, Coma Berenices, Ursa Major II, Ursa Minor, and Willman 1 in the North, Reticulum II, Sculptor, and Sagittarius II in the South – for which different DM density models yield consistent expectations, leading to robust predictions. CTAO is expected to provide the strongest limits above $\sim$10 TeV, reaching velocity-averaged annihilation cross sections of $\sim 5\times 10^{-25}$ cm$^3$ s$^{-1}$ and decay lifetimes up to $\sim 10^{26}$ s for combined limits. Th...