Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation
	Yuan Q(袁强); Bi XJ(毕效军); Zhang J(张娟); Yuan, Q; Bi, XJ; Zhang, J
刊名	CHINESE PHYSICS C
	2009
卷号	33 期号:10 页码:826-833
关键词	dark matter substructures gamma-rays Fermi telescope
通讯作者	[Yuan Qiang ; Bi Xiao-Jun ; Zhang Juan] CAS, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Bi Xiao-Jun] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
英文摘要	The perspective of the detectability of Galactic dark matter subhaloes on the Fermi satellite is investigated in this work. Under the assumptions that dark matter annihilation accounts for the "GeV excess" of the Galactic diffuse gamma-rays discovered by EGRET and the gamma-ray flux is dominated by the contribution from subhaloes of dark matter, we calculate the expected number of dark matter subhaloes that Fermi may detect. We show that Fermi may detect a few tens to several hundred subhaloes in a 1-year all-sky survey. Since EGRET observation is taken as a normalization, this prediction is independent of the particle physics property of dark matter. The uncertainties of the prediction are discussed in detail. We find that the major uncertainty comes from the mass function of subhaloes, i.e., whether the subhaloes are "point like" (high-mass rich) or "diffuse like" (low-mass rich). Other uncertainties like the background estimation and the observational errors will contribute a factor of 2-3.
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000270401800002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238562]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Yuan Q,Bi XJ,Zhang J,et al. Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation[J]. CHINESE PHYSICS C,2009,33(10):826-833.
APA	袁强,毕效军,张娟,Yuan, Q,Bi, XJ,&Zhang, J.(2009).Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation.CHINESE PHYSICS C,33(10),826-833.
MLA	袁强,et al."Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation".CHINESE PHYSICS C 33.10(2009):826-833.