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题名: Search for gamma-ray line features from Milky Way satellites with Fermi LAT Pass 8 data
作者: 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
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 94, 期号:10, 页码:103502
英文摘要: 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.
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16816
Appears in Collections:暗物质和空间天文实验室_期刊论文

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