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.

13 pages, 11 figures

References in corpus (15)

• Dark Matter and Collider Phenomenology of Universal Extra Dimensions
• TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter
• Dark matter annihilation or unresolved astrophysical sources? Anisotropy probe of the origin of cosmic gamma-ray background
• Revealing dark matter substructure with anisotropies in the diffuse gamma-ray background
• Can Dark Matter Annihilation Dominate the Extragalactic Gamma-Ray Background?
• Angular Signatures of Annihilating Dark Matter in the Cosmic Gamma-Ray Background
• Hunting the lightest lightest neutralinos
• Prospects for detecting Dark Matter with neutrino telescopes in Intermediate Mass Black Holes scenarios
• Angular power spectrum of gamma-ray sources for GLAST: blazars and clusters of galaxies
• Antiproton and Positron Signal Enhancement in Dark Matter Mini-Spikes Scenarios
• Angular Signatures of Dark Matter in the Diffuse Gamma Ray Background
• Dark matter annihilation from intermediate-mass black holes: Contribution to the extragalactic gamma-ray background
• Search for Gamma-rays from Dark Matter annihilations around Intermediate Mass Black Holes with the H.E.S.S. experiment
• Black Holes as Dark Matter Annihilation Boosters
• Gamma-Rays from Dark Matter Mini-Spikes in M31

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• Anisotropies in the Diffuse Gamma-Ray Background from Dark Matter with Fermi LAT: a closer look
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• Black Holes in our Galactic Halo: Compatibility with FGST and PAMELA Data and Constraints on the First Stars
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• Anisotropies in the diffuse gamma-ray background measured by Fermi LAT
• SZ effects from annihilating dark matter in the Milky Way: smooth halo, subhalos and intermediate-mass-black-holes
• Investigating the dark matter minispikes with the gamma-ray signal from the halo of M31