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, 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 ($95\%\text{C.L.}$) for annihilation cross-section and decay lifetime for WIMP candidates with masses between $1$ and $100\text{TeV}$. 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 contraints are comparable to the limits from classical dSph galaxies and $\sim 2$ orders of magnitude weaker than the ultrafaint dSph limits.

arXiv comment22 pages, 11 figures, 3 tables

References in corpus (29)

• A Universal Density Profile from Hierarchical Clustering
• An Introduction to PYTHIA 8.2
• Particle Dark Matter: Evidence, Candidates and Constraints
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• A History of Dark Matter
• Direct Detection of WIMP Dark Matter: Concepts and Status
• Observation of the Crab Nebula with the HAWC Gamma-Ray Observatory
• The 2HWC HAWC Observatory Gamma Ray Catalog
• Gravitino Dark Matter in R-Parity Breaking Vacua
• Dark matter and the early Universe: a review
• The flattening of the concentration-mass relation towards low halo masses and its implications for the annihilation signal boost
• 3HWC: The Third HAWC Catalog of Very-High-Energy Gamma-ray Sources
• The universal rotation curve of dwarf disk galaxies
• Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC
• Non-circular motions and the diversity of dwarf galaxy rotation curves
• TeV-Scale Thermal WIMPs: Unitarity and its Consequences
• Dark Matter Limits From Dwarf Spheroidal Galaxies with The HAWC Gamma-Ray Observatory
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Scaling Relations for Dark Matter Annihilation and Decay Profiles in Dwarf Spheroidal Galaxies
• The Star Forming Main Sequence of Dwarf Low Surface Brightness Galaxies
• CLUMPY v3: $\gamma$-ray and $\nu$ signals from dark matter at all scales
• Effect of Black Holes in Local Dwarf Spheroidal Galaxies on Gamma-Ray Constraints on Dark Matter Annihilation
• Theoretical predictions for dark matter detection in dwarf irregular galaxies with gamma rays
• The stellar content of 10 dwarf irregular galaxies
• Interstellar gamma-ray emission from cosmic rays in star-forming galaxies
• Search for dark matter annihilation in the dwarf irregular galaxy WLM with H.E.S.S
• Overview of searches for dark matter at the LHC
• Dark Matter search in dwarf irregular galaxies with the Fermi Large Area Telescope
• Decaying WIMP dark matter for AMS-02 cosmic positron excess

Cited by in corpus (3)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Searching for dark matter subhalos in the Fermi-LAT catalog with Bayesian neural networks
• Dark Matter spikes around Sgr A* in $\gamma$-rays