Robust identification of isotropic diffuse gamma rays from Galactic dark matter

Details Robust identification of isotropic diffuse gamma rays from Galactic dark matter Robust identification of isotropic diffuse gamma rays from Galactic dark matter

2009-01-23

arxiv.org/abs/0901.3776v3

Phys.Rev.Lett.102:241301,2009

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 2 figures, added 1 reference, published in PRL

Scientific paper

10.1103/PhysRevLett.102.241301

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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