publication . Preprint . 2009

The angular power spectrum of the diffuse gamma-ray background as a probe of Galactic dark matter substructure

Siegal-Gaskins, Jennifer M.;
Open Access English
  • Published: 01 Jul 2009
Abstract
Dark matter annihilation in Galactic substructure produces diffuse gamma-ray emission of remarkably constant intensity across the sky, and in general this signal dominates over the smooth halo signal at angles greater than a few tens of degrees from the Galactic Center. The large-scale isotropy of the emission from substructure suggests that it may be difficult to extract this Galactic dark matter signal from the extragalactic gamma-ray background. I show that dark matter substructure induces characteristic small-scale anisotropies in the diffuse emission which may provide a robust means of distinguishing this component. I discuss predictions for the angular pow...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Galaxy Astrophysics
free text keywords: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
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