Search for a gamma-ray line feature from a group of nearby galaxy clusters with Fermi LAT Pass 8 data

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 暗物质和空间天文实验室

	Search for a gamma-ray line feature from a group of nearby galaxy clusters with Fermi LAT Pass 8 data
	Liang, Yun-Feng1,2 ; Shen, Zhao-Qiang 1,2; Li, Xiang 1,2; Fan, Yi-Zhong1 ; Huang, Xiaoyuan 3; Lei, Shi-Jun1 ; Feng, Lei 1; Liang, En-Wei 4; Chang, Jin1
刊名	PHYSICAL REVIEW D
	2016-05-20
卷号	93 期号:10
英文摘要	Galaxy clusters are the largest gravitationally bound objects in the Universe and may be suitable targets for indirect dark matter searches. With 85 months of Fermi LAT Pass 8 publicly available data, we analyze the gamma-ray emission in the direction of 16 nearby galaxy clusters with an unbinned likelihood analysis. No statistically or globally significant gamma-ray line feature is identified and a tentative line signal may present at similar to 43 GeV. The 95% confidence level upper limits on the velocity-averaged cross section of dark matter particles annihilating into double gamma rays (i.e., sigma nu (chi chi -> gamma gamma)) are derived. Unless very optimistic boost factors of dark matter annihilation in these galaxy clusters have been assumed, such constraints are much weaker than the bounds set by the Galactic gamma-ray data.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]	Astronomy & Astrophysics ; Physics
关键词[WOS]	SUPERSYMMETRIC DARK-MATTER ; EMISSION ; ANNIHILATION ; SIGNAL ; CANDIDATES
收录类别	SCI
语种	英语
WOS记录号	WOS:000376259800005
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16215]
专题	紫金山天文台_暗物质和空间天文实验室
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100012, Peoples R China 3.Tech Univ Munich, Phys Dept T30d, James Franck Str, D-85748 Garching, Germany 4.Guangxi Univ, Dept Phys, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
推荐引用方式 GB/T 7714	Liang, Yun-Feng,Shen, Zhao-Qiang,Li, Xiang,et al. Search for a gamma-ray line feature from a group of nearby galaxy clusters with Fermi LAT Pass 8 data[J]. PHYSICAL REVIEW D,2016,93(10).
APA	Liang, Yun-Feng.,Shen, Zhao-Qiang.,Li, Xiang.,Fan, Yi-Zhong.,Huang, Xiaoyuan.,...&Chang, Jin.(2016).Search for a gamma-ray line feature from a group of nearby galaxy clusters with Fermi LAT Pass 8 data.PHYSICAL REVIEW D,93(10).
MLA	Liang, Yun-Feng,et al."Search for a gamma-ray line feature from a group of nearby galaxy clusters with Fermi LAT Pass 8 data".PHYSICAL REVIEW D 93.10(2016).