Seminarium Teorii Oddziaływań Elementarnych

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 potentially 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 anisotropies in the cross-correlation between dark matter signals, like gamma rays or radio waves, and gravitational tracers, namely the cosmic shear, CMB lensing and LSS distribution, will offer a novel and potentially very powerful opportunity to probe the particle physics nature of dark matter. The talk will discuss in details the features and the perspectives of the cross-correlation approach.