SEARCH FOR DARK MATTER SATELLITES USING FERMI-LAT
2012 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 747, no 2, 121- p.Article in journal (Refereed) Published
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.
dark matter, galaxies: dwarf, gamma rays: galaxies
IdentifiersURN: urn:nbn:se:su:diva-80157DOI: 10.1088/0004-637X/747/2/121ISI: 000302856400037OAI: oai:DiVA.org:su-80157DiVA: diva2:552305