161 articles – 2219 references  [version française]
 HAL: in2p3-00697553, version 1
 The Astrophysical Journal 747 (2012) 121
 Search for Dark Matter Satellites using the FERMI-LAT
 For the Fermi-LAT collaboration(s)
 (2012)
 Numerical simulations based on the Lambda-CDM model of cosmology predict a large number of as yet unobserved Galactic dark matter satellites. We report the results of a Large Area Telescope (LAT) search for these satellites via the gamma-ray emission expected from the annihilation of weakly interacting massive particle (WIMP) dark matter. Some dark matter satellites are expected to have hard gamma-ray spectra, finite angular extents, and a lack of counterparts at other wavelengths. We sought to identify LAT sources with these characteristics, focusing on gamma-ray spectra consistent with WIMP annihilation through the $b \bar b$ channel. We found no viable dark matter satellite candidates using one year of data, and we present a framework for interpreting this result in the context of numerical simulations to constrain the velocity-averaged annihilation cross section for a conventional 100 GeV WIMP annihilating through the $b \bar b$ channel.
 Research team: ASTRO
 Subject(s) : Physics/Astrophysics/Galactic AstrophysicsSciences of the Universe/Astrophysics/Galactic Astrophysics
 Keyword(s) : dark matter - galaxies: dwarf - gamma rays: galaxies
 in2p3-00697553, version 1 http://hal.in2p3.fr/in2p3-00697553 oai:hal.in2p3.fr:in2p3-00697553 From: Nathalie Martin <> Submitted for: Xian HOU <> Submitted on: Tuesday, 15 May 2012 15:59:49 Updated on: Tuesday, 15 May 2012 16:47:39