Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
文献类型：期刊论文
| 作者 | Zhao, Yi1,2; Bi, Xiao-Jun3,4; Yin, Peng-Fei3; Zhang, Xinmin1,2,4 |
| 刊名 | Physical review d
 |
| 出版日期 | 2018-03-26 |
| 卷号 | 97期号:6页码:10 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.97.063013 |
| 通讯作者 | Zhao, yi() |
| 英文摘要 | Searching for gamma rays from dwarf spheroidal galaxies (dsphs) is a promising approach to detect dark matter (dm) due to the high dm densities and low baryon components in dsphs. the fermi-lat observations from dsphs have set stringent constraints on the velocity independent annihilation cross section. however, the constraints from dsphs may change in velocity dependent annihilation scenarios because of the different velocity dispersions in galaxies. in this work, we study how to set constraints on the velocity dependent annihilation cross section from the combined fermi-lat observations of dsphs with the kinematic data. in order to calculate the gamma ray flux from the dsph, the correlation between the dm density profile and velocity dispersion at each position should be taken into account. we study such correlation and the relevant uncertainty from kinematic observations by performing a jeans analysis. using the observational results of three ultrafaint dsphs with large j-factors, including willman 1, reticulum ii, and triangulum ii, we set constraints on the p-wave annihilation cross section in the galaxy as an example. |
| WOS关键词 | LARGE-AREA TELESCOPE ; MILKY-WAY ; SPHEROIDAL GALAXIES ; JEANS ANALYSIS ; LOCAL GROUP ; MODELS ; SATELLITE ; PROFILE ; CLUSTERS ; HALO |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000428241300002 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178093 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Zhao, Yi |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Theoret Phys Div, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yi,Bi, Xiao-Jun,Yin, Peng-Fei,et al. Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies[J]. Physical review d,2018,97(6):10. |
| APA | Zhao, Yi,Bi, Xiao-Jun,Yin, Peng-Fei,&Zhang, Xinmin.(2018).Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies.Physical review d,97(6),10. |
| MLA | Zhao, Yi,et al."Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies".Physical review d 97.6(2018):10. |
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来源：高能物理研究所
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