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Limits on dark matter annihilation cross sections to gamma-ray lines with subhalo distributions in N-body simulations and Fermi LAT data
Liang, Yun-Feng1,2; Xia, Zi-Qing1,3; Duan, Kai-Kai1,2; Shen, Zhao-Qiang1,2; Li, Xiang1; Fan, Yi-Zhong1,3
2017-03-31
Source PublicationPHYSICAL REVIEW D
ISSN2470-0010
Volume95Issue:6Pages:8
Corresponding AuthorLiang, Yun-Feng()
AbstractIn this work, we simulate a set of realizations of the local volume dark matter subhalo population based on the distributions and relations derived from Via Lactea II N-body simulation. We calculate the J-factors of these subhalos, and find that the low mass subhalos contribute a lot to the total J-factors. Combining with 91 months of the Fermi LAT observation, we constrain on the cross section of dark matter annihilating directly to two gamma rays. This is the first work combining numerical simulation results and Fermi LAT observations to constrain the dark matter cross section to the gamma-ray line with the subhalo population. Though the constraints derived from the subhalo population are weaker than those from the Fermi LAT observation of the Galactic center, they are supportive of and complementary to these other results.
DOI10.1103/PhysRevD.95.063531
WOS KeywordLARGE-AREA TELESCOPE ; SIGNAL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000399147100003
PublisherAMER PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23169
Collection中国科学院紫金山天文台
Corresponding AuthorLiang, Yun-Feng
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100012, Peoples R China
3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Liang, Yun-Feng,Xia, Zi-Qing,Duan, Kai-Kai,et al. Limits on dark matter annihilation cross sections to gamma-ray lines with subhalo distributions in N-body simulations and Fermi LAT data[J]. PHYSICAL REVIEW D,2017,95(6):8.
APA Liang, Yun-Feng,Xia, Zi-Qing,Duan, Kai-Kai,Shen, Zhao-Qiang,Li, Xiang,&Fan, Yi-Zhong.(2017).Limits on dark matter annihilation cross sections to gamma-ray lines with subhalo distributions in N-body simulations and Fermi LAT data.PHYSICAL REVIEW D,95(6),8.
MLA Liang, Yun-Feng,et al."Limits on dark matter annihilation cross sections to gamma-ray lines with subhalo distributions in N-body simulations and Fermi LAT data".PHYSICAL REVIEW D 95.6(2017):8.
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