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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
2009
发表期刊CHINESE PHYSICS C
卷号33期号:10页码:826-833
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
文章类型Article
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.
关键词dark matter substructures gamma-rays Fermi telescope
学科领域Physics
研究领域[WOS]Physics ; Physics
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语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000270401800002
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238562
专题粒子天体物理中心
实验物理中心
作者单位中国科学院高能物理研究所
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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.
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