@article{f8bb31af88db43fd9e9e01ff3f14fc7f,
title = "Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory",
abstract = "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.",
author = "{The HAWC Collaboration} and R. Alfaro and C. Alvarez and Arteaga-Vel{\'a}zquez, {J. C.} and Rojas, {D. Avila} and Solares, {H. A.Ayala} and R. Babu and E. Belmont-Moreno and Caballero-Mora, {K. S.} and T. Capistr{\'a}n and A. Carrami{\~n}ana and S. Casanova and O. Chaparro-Amaro and U. Cotti and J. Cotzomi and {De La Fuente}, E. and {Diaz Hernandez}, R. and Dingus, {B. L.} and DuVernois, {M. A.} and M. Durocher and D{\'i}az-V{\'e}lez, {J. C.} and C. Espinoza and Fan, {K. L.} and N. Fraija and Garc{\'i}a-Gonz{\'a}lez, {J. A.} and F. Garfias and Gonz{\'a}lez, {M. M.} and Harding, {J. P.} and S. Hern{\'a}ndez-Cadena and D. Huang and F. Hueyotl-Zahuantitla and A. Iriarte and V. Joshi and S. Kaufmann and D. Kieda and J. Lee and Vargas, {H. Le{\'o}n} and Linnemann, {J. T.} and Longinotti, {A. L.} and G. Luis-Raya and K. Malone and O. Martinez and J. Mart{\'i}nez-Castro and Matthews, {J. A.} and E. Moreno and M. Mostaf{\'a} and A. Nayerhoda and L. Nellen and N. Omodei and Araujo, {Y. P{\'e}rez} and P{\'e}rez-P{\'e}rez, {E. G.}",
note = "Funding Information: We acknowledge the support from the US National Science Foundation (NSF); the US Department of Energy Office of High-Energy Physics; the Laboratory Directed Research and Development (LDRD) program of Los Alamos National Laboratory; Consejo Nacional de Ciencia y Tecnolog{\'i}a (CONACyT), M{\'e}xico, grant Nos. 271051, 232656, 260378, 179588, 254964, 258865, 243290, 132197, A1-S-46288, A1-S-22784, c{\'a}tedras 873, 1563, 341, 323, Red HAWC, M{\'e}xico; DGAPA-UNAM grant Nos. IG101320, IN111716-3, IN111419, IA102019, IN110621, IN110521, IN102223; VIEP-BUAP; PIFI 2012, 2013, PROFOCIE 2014, 2015; the University of Wisconsin Alumni Research Foundation; the Institute of Geophysics, Planetary Physics, and Signatures at Los Alamos National Laboratory; Polish Science Centre grant No. DEC-2017/27/B/ST9/02272; Coordinaci{\'o}n de la Investigaci{\'o}n Cient{\'i}fica de la Universidad Michoacana; Royal Society-Newton Advanced Fellowship 180385; Generalitat Valenciana, grant CIDEGENT/2018/034; the Program Management Unit for Human Resources & Institutional Development, Research and Innovation, NXPO (grant No. B16F630069); Coordinaci{\'o}n General Acad{\'e}mica e Innovaci{\'o}n (CGAI-UdeG), PRODEP-SEP UDG-CA-499; Institute of Cosmic Ray Research (ICRR), University of Tokyo, H.F. acknowledges support by NASA under award No. 80GSFC21M0002. We also acknowledge the significant contributions over many years of Stefan Westerhoff, Gaurang Yodh, and Arnulfo Zepeda Dominguez, all deceased members of the HAWC Collaboration. We thank Scott Delay, Luciano D{\'i}az, and Eduardo Murrieta for their technical support. Viviana Gammaldi{\textquoteright}s contribution to this work has been supported by Juan de la Cierva-Incorporaci{\'o}n IJC2019-040315-I grants, by grant Nos. PGC2018-095161-B-I00, CEX2020-001007-S, and PID2021-125331NB-I00 all funded by MCIN/AEI/10.13039/501100011033 and by ERDF “A way of making Europe.” Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",
year = "2023",
month = mar,
day = "1",
doi = "10.3847/1538-4357/acb5f1",
language = "English (US)",
volume = "945",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1",
}