Dark-matter decay and the abundance of ultracompact minihalos
文献类型：期刊论文
| 作者 | Yang, YP ; Yang, GL ; Zong, HS |
| 刊名 | EPL
 |
| 出版日期 | 2013 |
| 卷号 | 101期号:6页码:69001 |
| 关键词 | PRIMORDIAL BLACK-HOLES UNIVERSE CONSTRAINTS SPECTRUM PROBE |
| ISSN号 | 0295-5075 |
| 通讯作者 | Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China. |
| 英文摘要 | Ultracompact minihalos would be formed if there are larger density perturbations (0.0003 < delta rho/rho < 0.3) in the earlier epoch. Their density profile is steeper than the standard dark-matter halos. If dark matter can annihilate or decay into standard particles, e. g., photons, these objects would be the potential astrophysical sources. In order to be consistent with observations, as those from Fermi, the abundance of ultracompact minihalos must be constrained. On the other hand, the formation of these objects has very tight relation with the primordial curvature perturbations on smaller scale, so the fraction of ultracompact minihalos is very important for modern cosmology. In previous works, the studies are focused on the dark-matter annihilation for these objects. But if dark matter is not annihilated, the dark-matter decay is another important possible case. On the other hand, the abundance of ultracompact minihalos is related to many other parameters, such as the mass of dark matter, the decay channels and the density profile of dark-matter halos. One of the important aspects of this work is that we investigate the gamma-ray signals from nearby ultracompact minihalos due to dark-matter decay and another important aspect is to study in detail how the different decay channels and density profiles affect the constraints on the abundance of ultracompact minihalos. Copyright (C) EPLA, 2013 |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10935001, 11075075] |
| 原文出处 | http://dx.doi.org/10.1209/0295-5075/101/69001 |
| 语种 | 英语 |
| WOS记录号 | WOS:000317918300037 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15408]  |
| 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,Zong, HS. Dark-matter decay and the abundance of ultracompact minihalos[J]. EPL,2013,101(6):69001. |
| APA | Yang, YP,Yang, GL,&Zong, HS.(2013).Dark-matter decay and the abundance of ultracompact minihalos.EPL,101(6),69001. |
| MLA | Yang, YP,et al."Dark-matter decay and the abundance of ultracompact minihalos".EPL 101.6(2013):69001. |
入库方式： OAI收割
来源：理论物理研究所
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