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题名: Contribution of ultracompact dark matter minihalos to the isotropic radio background
作者: Yang, YP ;  Yang, GL ;  Huang, XY ;  Chen, XL ;  Lu, T ;  Zong, HS
刊名: PHYSICAL REVIEW D
出版日期: 2013
卷号: 87, 期号:8, 页码:83519
关键词: PRIMORDIAL BLACK-HOLES ;  408 MHZ ;  SKY ;  UNIVERSE ;  FIELDS ;  PROBE
学科分类: Physics
通讯作者: Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
部门归属: [Yang, Yupeng; Yang, Guilin; Lu, Tan; Zong, Hongshi] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China; [Yang, Yupeng] Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China; [Huang, Xiaoyuan; Chen, Xuelei] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China; [Lu, Tan] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China; [Yang, Yupeng; Yang, Guilin; Lu, Tan; Zong, Hongshi] Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China; [Zong, Hongshi] Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: The 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
资助者: National Natural Science Foundation of China [10935001, 11075075, 11275097]; Research Fund for the Doctoral Program of Higher Education [2012009111002]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000317866900001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15379
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Yang, YP,Yang, GL,Huang, XY,et al. Contribution of ultracompact dark matter minihalos to the isotropic radio background[J]. PHYSICAL REVIEW D,2013,87(8):83519.
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