PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
Constraints on ultracompact minihalos from extragalactic gamma-ray background
Yang, Yupeng1,2,3; Feng, Lei1,3; Huang, Xiaoyuan2; Chen, Xuelei2; Lu, Tan3,4; Zong, Hongshi1,3
2011-12-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Issue12
AbstractIt has been proposed that ultracompact minihalos (UCMHs) might be formed in earlier epoch. If dark matter consists of Weakly Interacting Massive Particles (WIMPs), UCMHs can be treated as the gamma-ray sources due to dark matter annihilation within them. In this paper, we investigate the contributions of UCMHs formed during three phase transitions (i.e., electroweak symmetry breaking, QCD confinement and e(+)e(-) annihilation) to the extragalactic gamma-ray background. Moreover, we use the Fermi-LAT observation data of the extragalactic gamma-ray background to get the constraints on the current abundance of UCMHs produced during these phase transitions. We also compare these results with those obtained from Cosmic Microwave Background (CMB) observations and find that the constraints from the Fermi-LAT are more stringent than those from CMB.
KeywordDark Matter Theory Gamma Ray Theory Cosmological Parameters From Cmbr
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1475-7516/2011/12/020
WOS KeywordDARK-MATTER ; POWER SPECTRUM ; ABUNDANCE ; ENERGIES ; UNIVERSE ; PROBE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000299199300020
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15965
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Yang, Yupeng,Feng, Lei,Huang, Xiaoyuan,et al. Constraints on ultracompact minihalos from extragalactic gamma-ray background[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2011(12).
APA Yang, Yupeng,Feng, Lei,Huang, Xiaoyuan,Chen, Xuelei,Lu, Tan,&Zong, Hongshi.(2011).Constraints on ultracompact minihalos from extragalactic gamma-ray background.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(12).
MLA Yang, Yupeng,et al."Constraints on ultracompact minihalos from extragalactic gamma-ray background".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .12(2011).
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