Speaker
Description
will be based on
A.~Cuoco, J.~Q.~Xia, M.~Regis, E.~Branchini, N.~Fornengo and M.~Viel,
%``Dark Matter Searches in the Gamma-ray Extragalactic Background via Cross-correlations With Galaxy Catalogs,''
Astrophys.\ J.\ Suppl.\ {\bf 221} (2015) no.2, 29
doi:10.1088/0067-0049/221/2/29
[arXiv:1506.01030 [astro-ph.HE]]
M.~Regis, J.~Q.~Xia, A.~Cuoco, E.~Branchini, N.~Fornengo and M.~Viel,
%``Particle dark matter searches outside the Local Group,''
Phys.\ Rev.\ Lett.\ {\bf 114} (2015) no.24, 241301
doi:10.1103/PhysRevLett.114.241301
[arXiv:1503.05922 [astro-ph.CO]].
J.~Q.~Xia, A.~Cuoco, E.~Branchini and M.~Viel,
%``Tomography of the Fermi-lat $\gamma$-ray Diffuse Extragalactic Signal via Cross Correlations With Galaxy Catalogs,''
Astrophys.\ J.\ Suppl.\ {\bf 217} (2015) no.1, 15
doi:10.1088/0067-0049/217/1/15
[arXiv:1503.05918 [astro-ph.CO]].
Summary
I will discuss the recent observations of correlation of the Extra-Galactic Gamma-ray Background with catalogues of galaxies as tracers of the Large Scale Structures of the Universe. These observations offer a new way to investigate the diffuse extra-galactic gamma-rays providing access to the redshift distribution of this emission. Furthermore, this allows to derive new stringent constraints on the presence of a possible dark matter annihilation signal.
