SEARCH FOR DARK MATTER SATELLITES USING FERMI-LAT
SEARCH FOR DARK MATTER SATELLITES USING FERMI-LAT
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DOI：
10.1088/0004-637x/747/2/121
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
T. A. C. M. Ackermann;A. Albert;L. Baldini;J. Ballet;G. Barbiellini;D. Bastieri;K. Bechtol;R. Bellazzi
中科院分区：
文献类型：
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作者：
T. A. C. M. Ackermann;A. Albert;L. Baldini;J. Ballet;G. Barbiellini;D. Bastieri;K. Bechtol;R. Bellazzi
Numerical simulations based on the ΛCDM 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 γ-ray emission expected from the annihilation of weakly interacting massive particle (WIMP) dark matter. Some dark matter satellites are expected to have hard γ-ray spectra, finite angular extents, and a lack of counterparts at other wavelengths. We sought to identify LAT sources with these characteristics, focusing on γ-ray spectra consistent with WIMP annihilation through the 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 channel.
