PMO OpenIR  > 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-Qiang1,2; Li, Xiang1,2; Fan, Yi-Zhong1; Huang, Xiaoyuan3; Lei, Shi-Jun1; Feng, Lei1; Liang, En-Wei4; Chang, Jin1
2016-05-20
Source PublicationPHYSICAL REVIEW D
Volume93Issue:10
AbstractGalaxy 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 HeadingsScience & Technology ; Physical Sciences
DOI10.1103/PhysRevD.93.103525
WOS KeywordSUPERSYMMETRIC DARK-MATTER ; EMISSION ; ANNIHILATION ; SIGNAL ; CANDIDATES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000376259800005
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16215
Collection暗物质和空间天文实验室
Affiliation1.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
Recommended Citation
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).
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