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3FGL J1924.8-1034: A spatially extended stable unidentified GeV source?
Xia, Zi-Qing1,2; Duan, Kai-Kai1,3; Li, Shang1,3; Liang, Yun-Feng1,3; Shen, Zhao-Qiang1,3; Yue, Chuan1,3; Wang, Yuan-Peng1,3; Yuan, Qiang1,2; Fan, Yi-Zhong1,2; Wu, Jian1,2; Chang, Jin1,2
2017-05-19
Source PublicationPHYSICAL REVIEW D
ISSN2470-0010
Volume95Issue:10Pages:8
Corresponding AuthorLi, Shang(lishang@pmo.ac.cn) ; Liang, Yun-Feng(liangyf@pmo.ac.cn) ; Shen, Zhao-Qiang(zqshen@pmo.ac.cn) ; Fan, Yi-Zhong(yzfan@pmo.ac.cn)
AbstractMilky Way-like galaxies are predicted to host a very large number of dark matter subhalos. Some massive and nearby subhalos could generate detectable gamma rays, appearing as unidentified, spatially extended and stable gamma-ray sources. We search for such sources in the third Fermi Large Area Telescope source list (3FGL) and report the identification of a new candidate, 3FGL J1924.8-1034. With the Fermi-LAT Pass 8 data, we find that 3FGL J1924.8-1034 is spatially extended at a high confidence level of 5.4 sigma, with a best-fit extension radius of similar to 0.15 degrees. No significant variability has been found and its gammaray spectrum is well fitted by the dark matter annihilation into b (b) over bar with a mass of similar to 43 GeV. All these facts make 3FGL J1924.8-1034 a possible dark matter subhalo candidate. However, due to the limited angular resolution, the possibility of that the spatial extension of 3FGL J1924.8-1034 is caused by the contamination from the other unresolved point source cannot be ruled out.
DOI10.1103/PhysRevD.95.102001
WOS KeywordLARGE-AREA TELESCOPE ; DARK-MATTER ANNIHILATION ; GAMMA-RAY EMISSION ; ALL-SKY SURVEY ; FERMI-LAT ; SOURCE CATALOG ; SUBSTRUCTURE ; CANDIDATES ; SEARCH ; HALOS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000401658800001
PublisherAMER PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23097
Collection中国科学院紫金山天文台
Corresponding AuthorLi, Shang; Liang, Yun-Feng; Shen, Zhao-Qiang; Fan, Yi-Zhong
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Xia, Zi-Qing,Duan, Kai-Kai,Li, Shang,et al. 3FGL J1924.8-1034: A spatially extended stable unidentified GeV source?[J]. PHYSICAL REVIEW D,2017,95(10):8.
APA Xia, Zi-Qing.,Duan, Kai-Kai.,Li, Shang.,Liang, Yun-Feng.,Shen, Zhao-Qiang.,...&Chang, Jin.(2017).3FGL J1924.8-1034: A spatially extended stable unidentified GeV source?.PHYSICAL REVIEW D,95(10),8.
MLA Xia, Zi-Qing,et al."3FGL J1924.8-1034: A spatially extended stable unidentified GeV source?".PHYSICAL REVIEW D 95.10(2017):8.
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