PMO OpenIR
Search for gamma-ray emission from the nearby dwarf spheroidal galaxies with 9 years of Fermi-LAT data
Li, Shang1,2; Duan, Kai-Kai1,2; Liang, Yun-Feng1; Xia, Zi-Qing1,3; Shen, Zhao-Qiang1,2; Li, Xiang1; Liao, Neng-Hui1; Feng, Lei1; Yuan, Qiang1,3; Fan, Yi-Zhong1,3; Chang, Jin1
2018-06-08
Source PublicationPHYSICAL REVIEW D
ISSN2470-0010
Volume97Issue:12Pages:7
Abstract

In this work, we search for gamma-ray emission from nearby Milky Way dwarf spheroidal galaxies (dSphs) and candidates with the publicly available Pass 8 data of Fermi-LAT. Our sample includes 12 sources with the distances < 50 kpc. Very weak gamma-ray excesses (similar to 2 sigma) are found in some dSphs/candidates, consistent with those reported in the previous literature. Intriguingly, the peak test statistic (TS) value of the weak emission from Reticulum II rises continually. If interpreted as dark matter (DM) annihilation, the peak TS value is 13.5 for the annihilation channel of chi chi -> tau(+)tau(-) and the DM mass of m(chi) similar to 16 GeV. The combination of all these nearby sources yields a more significant (with local significance >4 sigma) gamma-ray signal.

DOI10.1103/PhysRevD.97.122001
WOS KeywordANNIHILATING DARK-MATTER ; MILKY-WAY ; CANDIDATES ; MISSION ; SIGNAL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000434630600001
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/21980
Collection中国科学院紫金山天文台
Corresponding AuthorLiang, 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 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,Duan, Kai-Kai,Liang, Yun-Feng,et al. Search for gamma-ray emission from the nearby dwarf spheroidal galaxies with 9 years of Fermi-LAT data[J]. PHYSICAL REVIEW D,2018,97(12):7.
APA Li, Shang.,Duan, Kai-Kai.,Liang, Yun-Feng.,Xia, Zi-Qing.,Shen, Zhao-Qiang.,...&Chang, Jin.(2018).Search for gamma-ray emission from the nearby dwarf spheroidal galaxies with 9 years of Fermi-LAT data.PHYSICAL REVIEW D,97(12),7.
MLA Li, Shang,et al."Search for gamma-ray emission from the nearby dwarf spheroidal galaxies with 9 years of Fermi-LAT data".PHYSICAL REVIEW D 97.12(2018):7.
Files in This Item:
File Name/Size DocType Version Access License
2018-IR-240.pdf(307KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Shang]'s Articles
[Duan, Kai-Kai]'s Articles
[Liang, Yun-Feng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Shang]'s Articles
[Duan, Kai-Kai]'s Articles
[Liang, Yun-Feng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Shang]'s Articles
[Duan, Kai-Kai]'s Articles
[Liang, Yun-Feng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2018-IR-240.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.