Dark matter line search using a joint analysis of dwarf galaxies with the Fermi Gamma-ray Space Telescope
Dark matter line search using a joint analysis of dwarf galaxies with the Fermi Gamma-ray Space Telescope
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DOI：
10.1103/physrevd.86.021302
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发表时间：
2012-06
影响因子：
5
通讯作者：
A. Geringer-Sameth;S. Koushiappas
中科院分区：
文献类型：
--
作者：
A. Geringer-Sameth;S. Koushiappas
We perform a joint analysis of dwarf galaxy data from the Fermi Gamma-ray Space Telescope in search of dark matter annihilation into a gamma-ray line. We employ a novel statistical method that takes into account the spatial and spectral information of individual photon events from a sample of seven dwarf galaxies. Dwarf galaxies show no evidence of a gamma-ray line between 10 GeV and 1 TeV. The subsequent upper limit on the annihilation cross section to a two-photon final state is 3.9(+7.1)(-3.7) x 10^-26 cm^3/s at 130 GeV, where the errors reflect the systematic uncertainty in the distribution of dark matter within the dwarf galaxies.
