Contribution of ultracompact dark matter minihalos to the isotropic radio background
文献类型：期刊论文
| 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 |
| ISSN号 | 1550-7998 |
| 通讯作者 | Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, 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 |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10935001, 11075075, 11275097]; Research Fund for the Doctoral Program of Higher Education [2012009111002] |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevD.87.083519 |
| 语种 | 英语 |
| WOS记录号 | WOS:000317866900001 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15379]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | 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,&Zong, HS.(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. |
入库方式： OAI收割
来源：理论物理研究所
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