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Search for gamma-ray line features from Milky Way satellites with Fermi LAT Pass 8 data
Liang, Yun-Feng; Xia, Zi-Qing; Shen, Zhao-Qiang; Li, Xiang; Jiang, Wei; Yuan, Qiang; Fan, Yi-Zhong; Feng, Lei; Liang, En-Wei; Chang, Jin
2016
发表期刊PHYSICAL REVIEW D
卷号94期号:10页码:103502
摘要With 91 months of the publicly available Fermi LAT Pass 8 data, we analyze the gamma-ray emission from the Milky Way satellites to search for potential line signals due to the annihilation of dark matter particles into double photons. The searched targets include a sample of dwarf spheroidal galaxies, the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC). No significant line emission has been found in the stacked dwarf galaxy sample or in the direction of LMC/SMC. The corresponding upper limits on the cross section of DM annihilation into two photons are derived. Compared with results of previous gamma-ray line searches with the Pass 7 data, the current constraints on the line emission from dwarf spheroidal galaxies have been significantly improved in a wide energy range. With the rapid increase of the sample of dwarf spheroidal galaxies (candidates), we expect that the sensitivity of gamma-ray line searches will be significantly improved in the near future.
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/16816
专题暗物质和空间天文实验室
推荐引用方式
GB/T 7714
Liang, Yun-Feng,Xia, Zi-Qing,Shen, Zhao-Qiang,et al. Search for gamma-ray line features from Milky Way satellites with Fermi LAT Pass 8 data[J]. PHYSICAL REVIEW D,2016,94(10):103502.
APA Liang, Yun-Feng.,Xia, Zi-Qing.,Shen, Zhao-Qiang.,Li, Xiang.,Jiang, Wei.,...&Chang, Jin.(2016).Search for gamma-ray line features from Milky Way satellites with Fermi LAT Pass 8 data.PHYSICAL REVIEW D,94(10),103502.
MLA Liang, Yun-Feng,et al."Search for gamma-ray line features from Milky Way satellites with Fermi LAT Pass 8 data".PHYSICAL REVIEW D 94.10(2016):103502.
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