Constraints on ultracompact minihalos from extragalactic gamma-ray background
文献类型：期刊论文
| 作者 | Yang, Yupeng1,2,3; Feng, Lei1,3; Huang, Xiaoyuan2; Chen, Xuelei2 ; Lu, Tan3,4; Zong, Hongshi1,3
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| 出版日期 | 2011-12-01 |
| 期号 | 12 |
| 关键词 | dark matter theory gamma ray theory cosmological parameters from CMBR |
| 英文摘要 | It has been proposed that ultracompact minihalos (UCMHs) might be formed in earlier epoch. If dark matter consists of Weakly Interacting Massive Particles (WIMPs), UCMHs can be treated as the gamma-ray sources due to dark matter annihilation within them. In this paper, we investigate the contributions of UCMHs formed during three phase transitions (i.e., electroweak symmetry breaking, QCD confinement and e(+)e(-) annihilation) to the extragalactic gamma-ray background. Moreover, we use the Fermi-LAT observation data of the extragalactic gamma-ray background to get the constraints on the current abundance of UCMHs produced during these phase transitions. We also compare these results with those obtained from Cosmic Microwave Background (CMB) observations and find that the constraints from the Fermi-LAT are more stringent than those from CMB. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000299199300020 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7912]  |
| 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.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Yupeng,Feng, Lei,Huang, Xiaoyuan,et al. Constraints on ultracompact minihalos from extragalactic gamma-ray background[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2011(12). |
| APA | Yang, Yupeng,Feng, Lei,Huang, Xiaoyuan,Chen, Xuelei,Lu, Tan,&Zong, Hongshi.(2011).Constraints on ultracompact minihalos from extragalactic gamma-ray background.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(12). |
| MLA | Yang, Yupeng,et al."Constraints on ultracompact minihalos from extragalactic gamma-ray background".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .12(2011). |
入库方式： OAI收割
来源：国家天文台
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