Constraining Dark Matter in Galactic Substructure

  title={Constraining Dark Matter in Galactic Substructure},
  author={Eric J. Baxter and S. Dodelson and Savvas M. Koushiappas and Louis E. Strigari},
  journal={Physical Review D},
Detecting the dark matter annihilation signal from Galactic substructure, or subhalos, is an important challenge for high-energy gamma-ray experiments. In this paper we discuss detection prospects by combining two different aspects of the gamma-ray signal: the angular distribution and the photon counts probability distribution function (PDF). The true PDF from subhalos has been shown recently (by Lee et al.) to deviate from Poisson; we extend this analysis and derive the signal PDF from a… Expand

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and A
  • V. Kravtsov, ArXiv e-prints
  • 2010
and M
  • Kamionkowski
  • 2008
Journal of Cosmology and Astro-Particle Physics 7
  • 8
  • 2010
and C
  • Kilic
  • 2010
Fermi LAT)
  • Phys. Rev. Lett. 103,
  • 2009
JCAP 0906
  • 014
  • 2009
  • Rev. D80, 083504
  • 2009
and P
  • D. Serpico
  • 2009
JCAP 0810
  • 040
  • 2008
  • Rev. D77, 063512
  • 2008