Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703

doi:10.1103/PhysRevD.94.123002

	Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703
	Wang, Yuan-Peng 1,2; Duan, Kai-Kai 1,2; Ma, Peng-Xiong 1,2; Liang, Yun-Feng1,2 ; Shen, Zhao-Qiang 1,2; Li, Shang 1,2; Yue, Chuan 1,2; Yuan, Qiang 1; Zang, Jing-Jing1 ; Fan, Yi-Zhong1
刊名	PHYSICAL REVIEW D
	2016-12-02
卷号	94 期号:12 页码:7
ISSN号	2470-0010
DOI	10.1103/PhysRevD.94.123002
通讯作者	Liang, Yun-Feng(liangyf@pmo.ac.cn) ; Shen, Zhao-Qiang(zqshen@pmo.ac.cn) ; Li, Shang(lishang@pmo.ac.cn) ; Fan, Yi-Zhong(yzfan@pmo.ac.cn)
英文摘要	N-body simulations predict that galaxies at the Milky Way scale host a large number of dark matter (DM) subhalos. Some of these subhalos, if they are massive enough or close enough to the Earth, might be detectable in gamma rays due to the DM annihilation. 3FGL J2212.5+0703, an unidentified gamma-ray source, has been suggested to be the counterpart candidate of a DM subhalo by Bertoni et al. In this work we analyze the Fermi-LAT Pass 8 data of 3FGL J2212.5+0703 to independently test the DM subhalo hypothesis of this source. In order to suppress the possible contamination from two nearby very bright blazars, we just take into account the front-converting gamma rays which have better angular resolutions than that of the back-converting photons. In addition to the spatial distribution analysis, we have extended the spectrum analysis down to the energies of similar to 100 MeV, and thoroughly examined the variability of the emission during the past 8 years. We confirm that 3FGL J2212.5+0703 is a steady and spatially extended gamma-ray emitter at a high confidence level. The spectrum is well consistent with that expected from DM annihilation into b (b) over bar. The introduction of a phenomenological LogParabola spectrum just improves the fit slightly. All these results suggest that 3FGL J2212.5+0703 could be indicative of a DM subhalo.
WOS关键词	LARGE-AREA TELESCOPE ; MILKY-WAY SATELLITE ; FERMI-LAT ; GALAXY CANDIDATES ; DWARF GALAXIES ; SOURCE CATALOG ; ENERGY SURVEY ; 3-PI SURVEY ; PAN-STARRS ; FAINT
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000389028700001
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/23447]
专题	中国科学院紫金山天文台
通讯作者	Liang, Yun-Feng; Shen, Zhao-Qiang; Li, Shang; Fan, Yi-Zhong
作者单位	1.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
推荐引用方式 GB/T 7714	Wang, Yuan-Peng,Duan, Kai-Kai,Ma, Peng-Xiong,et al. Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703[J]. PHYSICAL REVIEW D,2016,94(12):7.
APA	Wang, Yuan-Peng.,Duan, Kai-Kai.,Ma, Peng-Xiong.,Liang, Yun-Feng.,Shen, Zhao-Qiang.,...&Chang, Jin.(2016).Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703.PHYSICAL REVIEW D,94(12),7.
MLA	Wang, Yuan-Peng,et al."Testing the dark matter subhalo hypothesis of the gamma-ray source 3FGL J2212.5+0703".PHYSICAL REVIEW D 94.12(2016):7.