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Yang, YP; Yang, GL; Huang, XY; Chen, XL; Lu, T; Zong, HS; Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
Contribution of ultracompact dark matter minihalos to the isotropic radio background
发表期刊PHYSICAL REVIEW D
语种英语
关键词Primordial Black-holes 408 Mhz Sky Universe Fields Probe
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
2013
ISSN1550-7998
卷号87期号:8页码:83519
学科领域Physics
收录类别SCI
项目资助者National Natural Science Foundation of China [10935001, 11075075, 11275097]; Research Fund for the Doctoral Program of Higher Education [2012009111002] ; National Natural Science Foundation of China [10935001, 11075075, 11275097]; Research Fund for the Doctoral Program of Higher Education [2012009111002] ; National Natural Science Foundation of China [10935001, 11075075, 11275097]; Research Fund for the Doctoral Program of Higher Education [2012009111002] ; National Natural Science Foundation of China [10935001, 11075075, 11275097]; Research Fund for the Doctoral Program of Higher Education [2012009111002]
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15379
专题理论物理所科研产出_SCI论文
通讯作者Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
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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.
APA Yang, YP.,Yang, GL.,Huang, XY.,Chen, XL.,Lu, T.,...&Yang, YP .(2013).Contribution of ultracompact dark matter minihalos to the isotropic radio background.PHYSICAL REVIEW D,87(8),83519.
MLA Yang, YP,et al."Contribution of ultracompact dark matter minihalos to the isotropic radio background".PHYSICAL REVIEW D 87.8(2013):83519.
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