The spatial distribution of dark matter annihilation originating from a gamma-ray line signal
文献类型：期刊论文
| 作者 | Lu, Tong-Suo1,2; Dong, Tie-Kuang1 ; Wu, Jian1
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 14期号:5页码:520-526 |
| 关键词 | cosmology: observations cosmology: dark matter Galaxy: center instrumentation: detectors |
| ISSN号 | 1674-4527 |
| 英文摘要 | The GeV - TeV gamma-ray line signal is the smoking gun signature of dark matter annihilation or decay. The detection of such a signal is one of the main targets of some space-based telescopes, including Fermi-LAT and the upcoming missions CALET, DAMPE and Gamma-400. An important feature of gamma-ray line photons that originate from dark-matter-annihilation is that they are concentrated at the center of the Galaxy. So far, no reliable gamma-ray line has been detected by Fermi-LAT, and the upper limits on the cross section of annihilation into gamma-rays have been reported. We use these upper limits to estimate the "maximal" number of gamma-ray line photons detectable for Fermi-LAT, DAMPE and Gamma-400, and then investigate the spatial distribution of these photons. We show that the center of the distribution will usually be offset from the Galactic center (Sgr A*) due to the limited statistics. Such a result is almost independent of models of the dark matter distribution, and will render the reconstruction of the dark matter distribution with the gamma-ray line signal very challenging for foreseeable space-based detectors. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GALAXY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335513000002 |
| 公开日期 | 2014-11-20 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/10561]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Tong-Suo,Dong, Tie-Kuang,Wu, Jian. The spatial distribution of dark matter annihilation originating from a gamma-ray line signal[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2014,14(5):520-526. |
| APA | Lu, Tong-Suo,Dong, Tie-Kuang,&Wu, Jian.(2014).The spatial distribution of dark matter annihilation originating from a gamma-ray line signal.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,14(5),520-526. |
| MLA | Lu, Tong-Suo,et al."The spatial distribution of dark matter annihilation originating from a gamma-ray line signal".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 14.5(2014):520-526. |
入库方式： OAI收割
来源：紫金山天文台
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