Is the gamma-ray emission around the Coma galaxy cluster a dark matter origin?

Abstract

Recently, gamma-ray emission in the direction of Coma, with a TS value of $\sim 40$, has been reported. In this work we will discuss the possibility of such a residual emission coming from dark matter annihilation. Our results show that the gamma-ray emission within the Coma region is also spatially correlated to the mass distribution derived from weak gravitational lensing measurements very well. However the dark matter models are not supported by the spectral analysis results and constraints by observations of other targets. Thus we derive the upper limits of the dark matter annihilation cross section according to the observation of the Coma region.

8 pages, 4 figures, comments are welcome

References in corpus (6)

• The DArk Matter Particle Explorer mission
• Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters
• Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
• Constraining Extended Gamma-ray Emission from Galaxy Clusters
• Cross-correlating the gamma-ray sky with catalogs of galaxy clusters
• Interpretations of the possible 42.7 GeV $\gamma$-ray line

Cited by in corpus (1)

• Annihilating Dark Matter Search with 12 Years of Fermi LAT Data in Nearby Galaxy Clusters