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2012 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 747, no 2, 121- p.Article in journal (Refereed) Published
Abstract [en]

Numerical simulations based on the ACDM 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 (b) over bar 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 (b) over bar channel.

Place, publisher, year, edition, pages
2012. Vol. 747, no 2, 121- p.
Keyword [en]
dark matter, galaxies: dwarf, gamma rays: galaxies
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-80157DOI: 10.1088/0004-637X/747/2/121ISI: 000302856400037OAI: diva2:552305


Available from: 2012-09-13 Created: 2012-09-12 Last updated: 2012-09-13Bibliographically approved

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Conrad, JanGarde, Maja LlenaYang, ZhaoyuZimmer, Stephan
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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