Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory

Alfaro R, Alvarez C, Arteaga-Velázquez JC, Rojas DA, Solares HA, Babu R, Belmont-Moreno E, Caballero-Mora KS, Capistrán T, Carramiñana A, Casanova S, Chaparro-Amaro O, Cotti U, Cotzomi J, De La Fuente E, Diaz Hernandez R, Dingus BL, DuVernois MA, Durocher M, Díaz-Vélez JC, Espinoza C, Fan KL, Fraija N, García-González JA, Garfias F, González MM, Harding JP, Hernández-Cadena S, Huang D, Hueyotl-Zahuantitla F, Iriarte A, Joshi V, Kaufmann S, Kieda D, Lee J, Vargas HL, Linnemann JT, Longinotti AL, Luis-Raya G, Malone K, Martinez O, Martínez-Castro J, Matthews JA, Moreno E, Mostafá M, Nayerhoda A, Nellen L, Omodei N, Araujo YP, Pérez-Pérez EG, Rho CD, Rosa-González D, Salazar H, Salazar-Gallegos D, Sandoval A, Serna-Franco J, Son Y, Springer RW, Tibolla O, Tollefson K, Torres I, Torres-Escobedo R, Turner R, Ureña-Mena F, Villaseñor L, Wang X, Willox E, Zhou H, De León C, Gammaldi V, Karukes E, Salucci P (2023)

Publication Type: Journal article

Publication year: 2023


Book Volume: 945

Article Number: 25

Journal Issue: 1

DOI: 10.3847/1538-4357/acb5f1


We present the results of dark matter (DM) searches in a sample of 31 dwarf irregular (dIrr) galaxies within the field of view of the HAWC Observatory. dIrr galaxies are DM-dominated objects in which astrophysical gamma-ray emission is estimated to be negligible with respect to the secondary gamma-ray flux expected by annihilation or decay of weakly interacting massive particles (WIMPs). While we do not see any statistically significant DM signal in dIrr galaxies, we present the exclusion limits (95% C.L.) for annihilation cross section and decay lifetime for WIMP candidates with masses between 1 and 100 TeV. Exclusion limits from dIrr galaxies are relevant and complementary to benchmark dwarf Spheroidal (dSph) galaxies. In fact, dIrr galaxies are targets kinematically different from benchmark dSph, preserving the footprints of different evolution histories. We compare the limits from dIrr galaxies to those from ultrafaint and classical dSph galaxies previously observed with HAWC. We find that the constraints are comparable to the limits from classical dSph galaxies and ∼2 orders of magnitude weaker than the ultrafaint dSph limits.

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Involved external institutions

University of Utah US United States (USA) (US) Universidad Politécnica de Pachuca (UPP) MX Mexico (MX) National Institute of Astrophysics, Optics and Electronics / Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE) MX Mexico (MX) National Autonomous University of Mexico / Universidad Nacional Autónoma de México (UNAM) MX Mexico (MX) Universidad Autónoma de Chiapas (UNACH) MX Mexico (MX) Universidad Michoacana de San Nicolás de Hidalgo (UMSNH) MX Mexico (MX) Pennsylvania State University (Penn State) US United States (USA) (US) Michigan Technological University US United States (USA) (US) Institute of Nuclear Physics PAN / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego PAN PL Poland (PL) National Polytechnic Institute of Mexico / Instituto Politécnico Nacional de México MX Mexico (MX) Benemérita Universidad Autónoma de Puebla (BUAP) / Meritorious Autonomous University of Puebla MX Mexico (MX) Universidad de Guadalajara (UDEG) MX Mexico (MX) Los Alamos National Laboratory US United States (USA) (US) University of Wisconsin - Madison US United States (USA) (US) University of Maryland US United States (USA) (US) Tecnológico de Monterrey (ITESM) MX Mexico (MX) University of Seoul (UOS) / 서울시립대학교 KR Korea, Republic of (KR) Michigan State University US United States (USA) (US) University of New Mexico (UNM) / Universidad de Nuevo México US United States (USA) (US) Shanghai Jiao Tong University / 上海交通大学 CN China (CN) Stanford University US United States (USA) (US) Universidad Autónoma de Madrid (UAM) ES Spain (ES) Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences PL Poland (PL) Scuola Internazionale Superiore di Studi Avanzati (SISSA) IT Italy (IT)

How to cite


Alfaro, R., Alvarez, C., Arteaga-Velázquez, J.C., Rojas, D.A., Solares, H.A., Babu, R.,... Salucci, P. (2023). Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory. Astrophysical Journal, 945(1).


Alfaro, R., et al. "Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory." Astrophysical Journal 945.1 (2023).

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