The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on γ -ray observations of Milky Way dSphs based on six years of Fermi Large Area Telescope data processed with the new Pass8 event-level analysis. None of the dSphs are significantly detected in γ 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 ≲100 GeV annihilating via quark and τ -lepton channels.
Titolo: | Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data | |
Autori: | ||
Data di pubblicazione: | 2015 | |
Rivista: | ||
Abstract: | The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on γ -ray observations of Milky Way dSphs based on six years of Fermi Large Area Telescope data processed with the new Pass8 event-level analysis. None of the dSphs are significantly detected in γ 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 ≲100 GeV annihilating via quark and τ -lepton channels. | |
Handle: | http://hdl.handle.net/11368/2871705 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.115.231301 | |
URL: | http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.115.231301/apsxml | |
Appare nelle tipologie: | 1.1 Articolo in Rivista |
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Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data.pdf | Articolo | Documento in Versione Editoriale | Digital Rights Management non definito | Open Access Visualizza/Apri |