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Study of the boxlike dark matter signals from dwarf spheroidal galaxies with Fermi-LAT data
Li, Shang1,2; Liang, Yun-Feng1; Xia, Zi-Qing1,3; Zu, Lei1,3; Duan, Kai-Kai1,2; Shen, Zhao-Qiang1,2; Feng, Lei1; Yuan, Qiang1,3; Fan, Yi-Zhong1,3
2018-04-16
Source PublicationPHYSICAL REVIEW D
ISSN2470-0010
Volume97Issue:8Pages:6
Corresponding AuthorLiang, Yun-Feng(liangyf@pmo.ac.cn) ; Xia, Zi-Qing(xiazq@pmo.ac.cn) ; Shen, Zhao-Qiang(zqshen@pmo.ac.cn)
AbstractThe observation of a special spectral feature in the gamma-ray data would be one of the best ways to identify dark matter (DM). The box-shaped gamma-ray spectra could be generated by the decay of intermediate particles produced by DM annihilation or decay. It provides another kind of signal that can be relatively easily distinguished from astrophysical backgrounds besides the linelike signals. Dwarf spheroidal galaxies are expected to be dominated by DM and may be one of the most promising targets for indirect DM searches. In this paper, we study the box-shaped DM signals with Fermi-LAT observations of dwarf spheroidal galaxies. We analyze 106 months of Fermi-LAT data to derive the upper limits on the annihilation cross section or the decay timescale of DM. In addition, we compare the results for different sample selections and DM density distributions. We expect that more dwarf spheroidal galaxies will be found and the sensitivity of box-shaped gamma-ray signal searches will be significantly improved in the future.
DOI10.1103/PhysRevD.97.083007
WOS KeywordCANDIDATES ; ANNIHILATION ; SATELLITES ; MISSION ; DECAY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000430061300003
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22479
Collection中国科学院紫金山天文台
Corresponding AuthorLiang, Yun-Feng; Xia, Zi-Qing; Shen, Zhao-Qiang
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China
3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Li, Shang,Liang, Yun-Feng,Xia, Zi-Qing,et al. Study of the boxlike dark matter signals from dwarf spheroidal galaxies with Fermi-LAT data[J]. PHYSICAL REVIEW D,2018,97(8):6.
APA Li, Shang.,Liang, Yun-Feng.,Xia, Zi-Qing.,Zu, Lei.,Duan, Kai-Kai.,...&Fan, Yi-Zhong.(2018).Study of the boxlike dark matter signals from dwarf spheroidal galaxies with Fermi-LAT data.PHYSICAL REVIEW D,97(8),6.
MLA Li, Shang,et al."Study of the boxlike dark matter signals from dwarf spheroidal galaxies with Fermi-LAT data".PHYSICAL REVIEW D 97.8(2018):6.
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