# Search for Dark Matter Satellites using the FERMI-LAT

6 ASTRO - Astroparticules
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
Abstract : 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.
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Journal articles
Astrophysical Journal, American Astronomical Society, 2012, 747, pp.121. <10.1088/0004-637X/747/2/121>
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http://hal.in2p3.fr/in2p3-00697553
Contributor : Nathalie Martin <>
Submitted on : Tuesday, May 15, 2012 - 3:59:49 PM
Last modification on : Friday, September 11, 2015 - 9:58:49 AM

### Citation

M. Ackermann, A. Albert, L. Baldini, J. Ballet, G. Barbiellini, et al.. Search for Dark Matter Satellites using the FERMI-LAT. Astrophysical Journal, American Astronomical Society, 2012, 747, pp.121. <10.1088/0004-637X/747/2/121>. <in2p3-00697553>

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