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arxiv: 1503.02641 · v2 · pith:FENFNAAQnew · submitted 2015-03-09 · 🌌 astro-ph.HE · hep-ex

Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data

Fermi-LAT Collaboration This is my paper
classification 🌌 astro-ph.HE hep-ex
keywords dsphsmilkyanalysisannihilationcrossdarkdatadwarf
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The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on gamma-ray observations of Milky Way dSphs based on 6 years of Fermi Large Area Telescope data processed with the new Pass 8 event-level analysis. None of the dSphs are significantly detected in gamma rays, and we present upper limits on the DM annihilation cross section from a combined analysis of 15 dSphs. These constraints are among the strongest and most robust to date and lie below the canonical thermal relic cross section for DM of mass $\lesssim$ 100 GeV annihilating via quark and $\tau$-lepton channels.

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