Robust identification of isotropic diffuse gamma rays from Galactic dark matter - INSPIRE

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Robust identification of isotropic diffuse gamma rays from Galactic dark matter

Jan, 2009

4 pages

Published in:

Phys.Rev.Lett. 102 (2009) 241301

e-Print:

0901.3776 [astro-ph.HE]

DOI:

10.1103/PhysRevLett.102.241301

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Abstract: (arXiv)

Dark matter annihilation in Galactic substructure will produce diffuse gamma-ray emission of remarkably constant intensity across the sky, making it difficult to disentangle this Galactic dark matter signal from the extragalactic gamma-ray background. We show that if Galactic dark matter contributes a modest fraction of the measured emission in an energy range accessible to the Fermi Gamma-ray Space Telescope, the energy dependence of the angular power spectrum of the total measured emission could be used to confidently identify gamma rays from Galactic dark matter substructure.

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