Angular correlations in the cosmic gamma-ray background from dark matter annihilation around intermediate-mass black holes
Abstract
Dark matter (DM) annihilation could in principle contribute to the diffuse cosmic gamma-ray back- ground (CGB). While with standard assumptions for cosmological and particle physics parameters this contribution is expected to be rather small, a number of processes could boost it, including a larger-than-expected DM annihilation cross-section, or the occurance of DM substructures such as DM mini-spikes around intermediate-mass black holes. We show that angular correlations of the CGB provide a tool to disentangle the signal induced by DM annihilation in mini-spikes from a conventional astrophysical component. Treating blazars as a known background, we study the prospects for detecting DM annihilations with the Fermi Gamma-Ray Space Telescope for different choices of DM mass and annihilation channels.
Keywords
Cite
@article{arxiv.0811.4493,
title = {Angular correlations in the cosmic gamma-ray background from dark matter annihilation around intermediate-mass black holes},
author = {Marco Taoso and Shin'ichiro Ando and Gianfranco Bertone and Stefano Profumo},
journal= {arXiv preprint arXiv:0811.4493},
year = {2010}
}
Comments
13 pages, 11 figures