Search for Unknown Dark Matter Satellites of the Milky Way
  We present a search for Galactic dark matter (DM) satellites using the Large Area Telescope (LAT). N-body simulations based on the Lambda-CDM model of cosmology predict a large number of as yet unobserved Galactic DM satellites. These satellites could potentially produce gamma rays through the self-annihilation of DM particles. Some DM satellites are expected to have hard gamma-ray spectra, finite angular extents, and a lack of counterparts at other wavelengths. We searched for LAT sources with these characteristics. We found no candidate DM satellites matching these criteria in one year of LAT data and interpreted this result in the context of N-body simulations. 
Alex Drlica-Wagner, Ping Wang, Elliott Bloom, and Louis Strigari (for   the Fermi-LAT Collaboration)
astro-ph.HE astro-ph.CO hep-ph