Gamma rays from warm WIMP dark matter annihilation
文献类型：期刊论文
| 作者 | Yuan, Q ; Cao, YX ; Liu, J ; Yin, PF ; Gao, L ; Bi, XJ ; Zhang, XM |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:10 |
| 关键词 | LARGE-AREA TELESCOPE DWARF GALAXIES GENERIC MODEL HALOES DENSITY CONSTRAINTS UNIVERSE SUBSTRUCTURE PROPAGATION ABUNDANCE |
| ISSN号 | 1550-7998 |
| 通讯作者 | Yuan, Q: Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China. |
| 中文摘要 | The weakly interacting massive particle (WIMP) often serves as a candidate for the cold dark matter. However, when produced nonthermally, it could behave like warm dark matter. In this paper, we study the properties of the gamma-ray emission from annihilation of WIMP dark matter in the halo of our own Milky Way galaxy with high resolution N-body simulations of a Milky-Way-like dark matter halo, assuming a different nature of WIMPs. Due to the large free-streaming length in the scenario of warm WIMPs, the substructure content of the dark matter halo is significantly different from that of the cold WIMP counterpart, resulting in distinct predictions of the gamma-ray signals from the dark matter annihilation. We illustrate these by comparing the predicted gamma-ray signals from the warm WIMP annihilation to that of cold WIMPs. Pronounced differences from the subhalo sky map and statistical properties between two WIMP models are demonstrated. Due to the potentially enhanced cross section of the nonthermal production mechanism in the warm WIMP scenario, the Galactic center might be prior to the indirect detection of warm WIMPs to dwarf galaxies, which might be different from the cold dark matter scenario. As a specific example, we consider the nonthermally produced neutralino of the supersymmetric model and discuss the detectability of warm WIMPs with the Fermi gamma-ray telescope. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [11075169, 11105155, 11105157, 11033005, 10975142, 10973018, 11133003]; 973 project [2010CB833000, 2009CB24901]; Chinese Academy of Sciences [KJCX2-EW-W01] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38557]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yuan, Q,Cao, YX,Liu, J,et al. Gamma rays from warm WIMP dark matter annihilation[J]. PHYSICAL REVIEW D,2012,86(10). |
| APA | Yuan, Q.,Cao, YX.,Liu, J.,Yin, PF.,Gao, L.,...&Zhang, XM.(2012).Gamma rays from warm WIMP dark matter annihilation.PHYSICAL REVIEW D,86(10). |
| MLA | Yuan, Q,et al."Gamma rays from warm WIMP dark matter annihilation".PHYSICAL REVIEW D 86.10(2012). |
入库方式： OAI收割
来源：物理研究所
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