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Combined dark matter search towards dwarf spheroidal galaxies with Fermi -LAT, HAWC, H.E.S.S., MAGIC, and VERITAS

Abdollahi, S. [Centre National de la Recherche Scientifique (CNRS) (France); Univ. of Toulouse (France); et al.] (ORCID:0000000268033605)·Baldini, L. (ORCID:0000000297857726)·Bellazzini, R. (ORCID:0000000224697063)·Berenji, B.·Bissaldi, E. (ORCID:0000000199358106)·Bonino, R. (ORCID:0000000242641215)·Bruel, P. (ORCID:0000000290327941)·Buson, S. (ORCID:000000023308324X)·Charles, E.·Chen, A.W.·Ciprini, S. (ORCID:0000000207122479)·Crnogorcevic, M.·Cuoco, A. (ORCID:000000031504894X)·D'Ammando, F. (ORCID:0000000176187527)·de Angelis, A.·Di Mauro, M.·Di Lalla, N. (ORCID:0000000275741298)·Di Venere, L. (ORCID:000000030703824X)·Domínguez, A. (ORCID:0000000234334610)·Fegan, S.J. (ORCID:0000000299782510)·Fiori, A. (ORCID:0000000331740688)·Fusco, P. (ORCID:0000000293832425)·Gammaldi, V. (ORCID:0000000318266117)·Gargano, F. (ORCID:0000000250556395)·Gasparrini, D. (ORCID:0000000250649495)·Giacchino, F. (ORCID:0000000202476884)·Giglietto, N. (ORCID:0000000290212888)·Giliberti, M. (ORCID:0009000728352963)·Giordano, F. (ORCID:0000000286512394)·Giroletti, M. (ORCID:0000000286578852)·Grenier, I.A. (ORCID:000000033274674X)·Guiriec, S. (ORCID:0000000157808770)·Gustafsson, M.·Hays, E. (ORCID:000000028172593X)·Hewitt, J.W. (ORCID:0000000240646346)·Horan, D. (ORCID:0000000155742579)·Katagiri, H.·Kuss, M. (ORCID:0000000312129998)·Li, J. (ORCID:0000000317209727)·Longo, F. (ORCID:0000000325012270)·Loparco, F. (ORCID:0000000211735673)·Lorusso, L. (ORCID:0000000225494401)·Martí-Devesa, G. (ORCID:0000000307666473)·Mazziotta, M.N. (ORCID:0000000193254672)·McEnery, J.E.·Mereu, I. (ORCID:0000000302194534)·Meyer, M. (ORCID:0000000207387581)·Michelson, P.F. (ORCID:0000000213215620)·Mirabal, N. (ORCID:0000000270215838)·Mitthumsiri, W.·Mizuno, T. (ORCID:0000000172630296)·Morselli, A. (ORCID:0000000277049553)·Moskalenko, I.V. (ORCID:000000016141458X)·Negro, M. (ORCID:0000000265485622)·Omodei, N. (ORCID:0000000254487577)·Orienti, M. (ORCID:0000000344707094)·Orlando, E.·Panzarini, G. (ORCID:0000000225861021)·Persic, M. (ORCID:0000000318534900)·Pesce-Rollins, M. (ORCID:0000000317908018)·Pillera, R. (ORCID:000000033808963X)·Porter, T.A. (ORCID:0000000226214440)·Principe, G. (ORCID:0000000304067387)·Rainò, S. (ORCID:0000000291810345)·Rando, R. (ORCID:000000016992818X)·Razzano, M. (ORCID:0000000348251629)·Reimer, O. (ORCID:0000000169531385)·Sánchez-Conde, M. (ORCID:0000000238499164)·Saz Parkinson, P.M. (ORCID:0000000165661246)·Serini, D. (ORCID:0000000297546530)·Suson, D.J. (ORCID:0000000329112025)·Torres, D.F. (ORCID:0000000215229065)·Zaharijas, G. (ORCID:0000000184847791)·Albert, A. (ORCID:0000000301975646)·Alfaro, R.·Alvarez, C.·Arteaga-Velázquez, J.C.·Avila Rojas, D. (ORCID:0000000240204142)·Ayala Solares, H.A. (ORCID:0000000220845049)·Babu, R. (ORCID:0000000255296780)·Belmont-Moreno, E. (ORCID:000000033207105X)·Caballero-Mora, K.S. (ORCID:0000000240423855)·Capistrán, T. (ORCID:0000000321582292)·Carramiñana, A. (ORCID:0000000285533302)·Casanova, S. (ORCID:0000000261449122)·Chaparro-Amaro, O.·Cotti, U. (ORCID:0000000276079582)·Cotzomi, J. (ORCID:000000021132871X)·Coutiño de León, S. (ORCID:000000027747754X)·de la Fuente, E. (ORCID:0000000196434134)·Diaz Hernandez, R.·Dingus, B.L. (ORCID:0000000184517450)·DuVernois, M.A. (ORCID:0000000229879691)·Durocher, M. (ORCID:0000000321690306)·Díaz-Vélez, J.C. (ORCID:0000000200870693)·Engel, K. (ORCID:0000000157371820)·Espinoza, C. (ORCID:0000000170741726)·Fan, K.L. (ORCID:0000000282464751)·Fraija, N. (ORCID:0000000201736453)·García-González, J.A. (ORCID:0000000241885584)
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Abstract

Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect dark matter (DM) searches using gamma-ray telescopes because they are thought to have high DM content and a low astrophysical background. The sensitivity of these searches is improved by combining the observations of dSphs made by different gamma-ray telescopes. We present the results of a combined search by the most sensitive currently operating gamma-ray telescopes, namely: the satellite-borne Fermi -LAT telescope; the ground-based imaging atmospheric Cherenkov telescope arrays H.E.S.S., MAGIC, and VERITAS; and the HAWC water Cherenkov detector. Individual datasets were analyzed using a common statistical approach. Results were subsequently combined via a global joint likelihood analysis. We obtain constraints on the velocity-weighted cross section 〈σv〉 for DM self-annihilation as a function of the DM particle mass. This five-instrument combination allows the derivation of up to 2-3 times more constraining upper limits on 〈σv〉 than the individual results over a wide mass range spanning from 5 GeV to 100 TeV. Depending on the DM content modeling, the 95% confidence level observed limits reach 1.5×10 -24 cm 3 s -1 and 3.2×10 -25 cm 3 s -1 , respectively, in the τ + τ - annihilation channel for a DM mass of 2 TeV.

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79 ASTRONOMY AND ASTROPHYSICSdark matter experimentsdwarfs galaxiesgamma ray experiments

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BibTeXRIS

Abdollahi, S. [Centre National de la Recherche Scientifique (CNRS) (France); Univ. of Toulouse (France); et al.] (ORCID:0000000268033605), Baldini, L. (ORCID:0000000297857726), Bellazzini, R. (ORCID:0000000224697063), Berenji, B., Bissaldi, E. (ORCID:0000000199358106), Bonino, R. (ORCID:0000000242641215), Bruel, P. (ORCID:0000000290327941), Buson, S. (ORCID:000000023308324X), Charles, E., Chen, A.W., Ciprini, S. (ORCID:0000000207122479), Crnogorcevic, M., Cuoco, A. (ORCID:000000031504894X), D'Ammando, F. (ORCID:0000000176187527), de Angelis, A., Di Mauro, M., Di Lalla, N. (ORCID:0000000275741298), Di Venere, L. (ORCID:000000030703824X), Domínguez, A. (ORCID:0000000234334610), Fegan, S.J. (ORCID:0000000299782510), Fiori, A. (ORCID:0000000331740688), Fusco, P. (ORCID:0000000293832425), Gammaldi, V. (ORCID:0000000318266117), Gargano, F. (ORCID:0000000250556395), Gasparrini, D. (ORCID:0000000250649495), Giacchino, F. (ORCID:0000000202476884), Giglietto, N. (ORCID:0000000290212888), Giliberti, M. (ORCID:0009000728352963), Giordano, F. (ORCID:0000000286512394), Giroletti, M. (ORCID:0000000286578852), Grenier, I.A. (ORCID:000000033274674X), Guiriec, S. (ORCID:0000000157808770), Gustafsson, M., Hays, E. (ORCID:000000028172593X), Hewitt, J.W. (ORCID:0000000240646346), Horan, D. (ORCID:0000000155742579), Katagiri, H., Kuss, M. (ORCID:0000000312129998), Li, J. (ORCID:0000000317209727), Longo, F. (ORCID:0000000325012270), Loparco, F. (ORCID:0000000211735673), Lorusso, L. (ORCID:0000000225494401), Martí-Devesa, G. (ORCID:0000000307666473), Mazziotta, M.N. (ORCID:0000000193254672), McEnery, J.E., Mereu, I. (ORCID:0000000302194534), Meyer, M. (ORCID:0000000207387581), Michelson, P.F. (ORCID:0000000213215620), Mirabal, N. (ORCID:0000000270215838), Mitthumsiri, W., Mizuno, T. (ORCID:0000000172630296), Morselli, A. (ORCID:0000000277049553), Moskalenko, I.V. (ORCID:000000016141458X), Negro, M. (ORCID:0000000265485622), Omodei, N. (ORCID:0000000254487577), Orienti, M. (ORCID:0000000344707094), Orlando, E., Panzarini, G. (ORCID:0000000225861021), Persic, M. (ORCID:0000000318534900), Pesce-Rollins, M. (ORCID:0000000317908018), Pillera, R. (ORCID:000000033808963X), Porter, T.A. (ORCID:0000000226214440), Principe, G. (ORCID:0000000304067387), Rainò, S. (ORCID:0000000291810345), Rando, R. (ORCID:000000016992818X), Razzano, M. (ORCID:0000000348251629), Reimer, O. (ORCID:0000000169531385), Sánchez-Conde, M. (ORCID:0000000238499164), Saz Parkinson, P.M. (ORCID:0000000165661246), Serini, D. (ORCID:0000000297546530), Suson, D.J. (ORCID:0000000329112025), Torres, D.F. (ORCID:0000000215229065), Zaharijas, G. (ORCID:0000000184847791), Albert, A. (ORCID:0000000301975646), Alfaro, R., Alvarez, C., Arteaga-Velázquez, J.C., Avila Rojas, D. (ORCID:0000000240204142), Ayala Solares, H.A. (ORCID:0000000220845049), Babu, R. (ORCID:0000000255296780), Belmont-Moreno, E. (ORCID:000000033207105X), Caballero-Mora, K.S. (ORCID:0000000240423855), Capistrán, T. (ORCID:0000000321582292), Carramiñana, A. (ORCID:0000000285533302), Casanova, S. (ORCID:0000000261449122), Chaparro-Amaro, O., Cotti, U. (ORCID:0000000276079582), Cotzomi, J. (ORCID:000000021132871X), Coutiño de León, S. (ORCID:000000027747754X), de la Fuente, E. (ORCID:0000000196434134), Diaz Hernandez, R., Dingus, B.L. (ORCID:0000000184517450), DuVernois, M.A. (ORCID:0000000229879691), Durocher, M. (ORCID:0000000321690306), Díaz-Vélez, J.C. (ORCID:0000000200870693), Engel, K. (ORCID:0000000157371820), Espinoza, C. (ORCID:0000000170741726), Fan, K.L. (ORCID:0000000282464751), Fraija, N. (ORCID:0000000201736453), García-González, J.A. (ORCID:0000000241885584). 2026-03-11. Combined dark matter search towards dwarf spheroidal galaxies with Fermi -LAT, HAWC, H.E.S.S., MAGIC, and VERITAS. https://doi.org/10.1088/1475-7516/2026/03/035

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79 ASTRONOMY AND ASTROPHYSICS↗