Looking to dark matter through gamma rays anisotropies

Nicolao Fornengo, University of Torino

Anisotropies in the extragalactic electromagnetic emission originated from dark matter represent an emerging tool in the quest for a particle dark matter signal. These anisotropies are due to the cumulative emission from unresolved dark matter structures, which are present at any scale: galaxy clusters, individual galaxies, subhalos inside galaxies. The same structures can be probed by gravitational tracers of the dark matter distribution in the Universe: this is obtained by large-scale-structure surveys, but in the future a good wealth of additional and complementary information will be available from weak lensing surveys. The study of gamma-rays anisotropies and the cross-correlation between the dark matter signal and gravitational tracers offer a novel and powerful opportunity to probe the particle physics nature of dark matter. The talk will introduce details and features of gamma-rays anisotropies and give perspectives of the cross-correlation approach.

(The slides will be available here)