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 background. 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 occurrence of DM substructures such as DM minispikes around intermediate-mass black holes. We show that angular correlations of the cosmic gamma-ray background provide a tool to disentangle the signal induced by DM annihilation in minispikes 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.
Additional Information
©2009 The American Physical Society. Received 19 December 2008; published 25 February 2009. M. T. thanks the California Institute of Technology for hospitality and partial support during the preparation of this work. S. A. is supported by the Sherman Fairchild Foundation. S. P. is supported by the U.S. Department of Energy under Grant No. DE-FG02-04ER41268 and by the National Science Foundation. # 95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)Additional details
- Eprint ID
- 15869
- Resolver ID
- CaltechAUTHORS:20090916-095659925
- Caltech
- Sherman Fairchild Foundation
- DE-FG02-04ER41268
- Department of Energy (DOE)
- NSF
- Created
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2009-09-22Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field