Resolving Dark Matter Subhalos With Future Sub-GeV Gamma-Ray Telescopes
arXiv:1709.08562
Abstract
Annihilating dark matter particles in nearby subhalos could generate potentially observable fluxes of gamma rays, unaccompanied by emission at other wavelengths. Furthermore, this gamma-ray emission is expected to be spatially extended, providing us with a powerful way to discriminate dark matter subhalos from other astrophysical gamma-ray sources. Fermi has detected two dark matter subhalo candidates which exhibit a statistically significant degree of spatial extension (3FGL J2212.5+0703 and 3FGL J1924.8-1034). It has been argued that the most likely non-dark matter interpretation of these observations is that they are each in fact multiple nearby point sources, too close to one another on the sky to be individually resolved. In this study, we consider the ability of next generation gamma-ray telescopes to spatially resolve the gamma-ray emission from subhalo candidates, focusing on the proposed e-ASTROGAM mission. We find that such an instrument could significantly clarify the nature of Fermi's dark matter subhalo candidates, and provide an unprecedented level of sensitivity to the presence of annihilating dark matter in nearby subhalos.
arXiv comment12 pages, 5 figures
References in corpus (14)
- The Aquarius Project: the subhalos of galactic halos
- A blueprint for detecting supersymmetric dark matter in the Galactic halo
- Search for Gamma-Ray Emission from DES Dwarf Spheroidal Galaxy Candidates with Fermi-LAT Data
- Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
- Stringent and Robust Constraints on the Dark Matter Annihilation Cross Section From the Region of the Galactic Center
- Search for Dark Matter Satellites using the FERMI-LAT
- Constraints on the Galactic Population of TEV Pulsar Wind Nebulae Using Fermi Large Area Telescope Observations
- The Detectability of Neutralino Clumps via Atmospheric Cherenkov Telescopes
- Search for extended gamma-ray emission from the Virgo galaxy cluster with Fermi-LAT
- Prospects for indirect dark matter searches with MeV photons
- Stringent Constraints On The Dark Matter Annihilation Cross Section From Subhalo Searches With The Fermi Gamma-Ray Space Telescope
- Realistic estimation for the detectability of dark matter sub-halos with Fermi-LAT
- TeV source HESS J1804-216 in X-rays and other wavelengths
- Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703