Contribution of ultracompact dark matter minihalos to the isotropic radio background
文献类型：期刊论文
| 作者 | Yang, Yupeng1,2,5; Yang, Guilin1,5; Huang, Xiaoyuan3; Chen, Xuelei3 ; Lu, Tan1,4,5; Zong, Hongshi1,5,6
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2013-04-22 |
| 卷号 | 87期号:8 |
| 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 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000317866900001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6013]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.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 |
| 推荐引用方式 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). |
| 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). |
| MLA | Yang, Yupeng,et al."Contribution of ultracompact dark matter minihalos to the isotropic radio background".PHYSICAL REVIEW D 87.8(2013). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。