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Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data
Stockholms universitet, Fysikum.
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Number of Authors: 126
2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 23Article in journal (Refereed) PublishedText
Abstract [en]

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 six years of Fermi Large Area Telescope data processed with the new PASS8 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 less than or similar to 100 GeV annihilating via quark and tau-lepton channels.

Place, publisher, year, edition, pages
2015. Vol. 115, no 23
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-278105DOI: 10.1103/PhysRevLett.115.231301ISI: 000365877500001OAI: oai:DiVA.org:uu-278105DiVA: diva2:906109
Available from: 2016-01-12 Created: 2016-02-23 Last updated: 2016-02-23

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Anderson, BrandonConrad, JanLarsson, StefanLi, LiangLlena Garde, MajaMeyer, ManuelSánchez-Conde, MiguelZimmer, Stephan
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