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Contribution of ultracompact dark matter minihalos to the isotropic radio background
Yang, Yupeng1,2,5; Yang, Guilin1,5; Huang, Xiaoyuan3; Chen, Xuelei3; Lu, Tan1,4,5; Zong, Hongshi1,5,6
2013-04-22
Source PublicationPHYSICAL REVIEW D
ISSN1550-7998
Volume87Issue:8Pages:083519
Corresponding AuthorYang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China. Email: yyp@chenwang.nju.edu.cn ; zonghs@chenwang.nju.edu.cn
AbstractThe ultracompact minihalos could be formed during the earlier epoch of the Universe. The dark matter annihilation within them is very strong due to the steep density profile, rho similar to r(-2.25). The high-energy electrons and positrons from the dark matter annihilation can inverse Compton scatter with the background photons, such as cosmic microwave background photons, to acquire higher energy. On the other hand, the synchrotron radiation can also be produced when they meet the magnetic field. In this paper, we study the signals from the ultracompact minihalos (UCMHs) due to the dark matter annihilation for the radio, x-ray and gamma-ray band. We found that for the radio emission, the UCMHs can provide one kind of source for the radio excess observed by ARCADE 2. But the x-ray signals due to the inverse Compton scatter effect or the gamma-ray signals mainly due to the prompt emission from dark matter would exceed the present observations, such as Fermi, COMPTEL, and CHANDRA. We found that the strongest limits on the fraction of UCMHs come from the x-ray observations, and the constraints from the radio data are the weakest. DOI: 10.1103/PhysRevD.87.083519
Subject AreaAstronomy & AstroPhysics, Physics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1103/PhysRevD.87.083519
WOS KeywordPRIMORDIAL BLACK-HOLES ; 408 MHZ ; SKY ; UNIVERSE ; FIELDS ; PROBE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000317866900001
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9890
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.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
5.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
6.Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yang, Yupeng,Yang, Guilin,Huang, Xiaoyuan,et al. Contribution of ultracompact dark matter minihalos to the isotropic radio background[J]. PHYSICAL REVIEW D,2013,87(8):083519.
APA Yang, Yupeng,Yang, Guilin,Huang, Xiaoyuan,Chen, Xuelei,Lu, Tan,&Zong, Hongshi.(2013).Contribution of ultracompact dark matter minihalos to the isotropic radio background.PHYSICAL REVIEW D,87(8),083519.
MLA Yang, Yupeng,et al."Contribution of ultracompact dark matter minihalos to the isotropic radio background".PHYSICAL REVIEW D 87.8(2013):083519.
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