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题名: New constraints on primordial minihalo abundance using cosmic microwave background observations
作者: Yang, Yupeng1, 2, 3; Huang, Xiaoyuan3; Chen, Xuelei3; Zong, Hongshi1, 2
刊名: PHYSICAL REVIEW D
出版日期: 2011-08-08
卷号: 84, 期号:4
DOI: 10.1103/PhysRevD.84.043506
文章类型: Article
英文摘要: It was proposed that the massive compact halo objects (MCHOs) would be produced during an earlier epoch of cosmology if the density perturbations are between 3 x 10(-4) and 0.3. Then these objects can accrete dark matter particles onto them due to their high density. If the dark matter is in the form of the weakly interacting massive particles, the MCHOs can have a significant effect on the evolution of cosmology due to the dark matter annihilation within them. Using the WMAP-7 years data, we investigated the constraints on the current abundance of MCHOs (f(MCHOs)) formed during the e(+)e(-) annihilation phase transition. We have found that the 2 sigma constraint is f(MCHOs) less than or similar to 10(-4) for dark matter masses in the range between 1 GeV and 1 TeV.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]: Astronomy & Astrophysics ; Physics
关键词[WOS]: DARK-MATTER ; BLACK-HOLES ; ENERGIES ; SPECTRUM ; UNIVERSE ; PROBE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000293620100002
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15957
Appears in Collections:暗物质和空间天文实验室_期刊论文

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作者单位: 1.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
2.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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