ITP OpenIR  > 理论物理所2013年知识产出
Dark-matter decay and the abundance of ultracompact minihalos
Yang, YP; Yang, GL; Zong, HS; Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
2013
发表期刊EPL
ISSN0295-5075
卷号101期号:6页码:69001
摘要Ultracompact minihalos would be formed if there are larger density perturbations (0.0003 < delta rho/rho < 0.3) in the earlier epoch. Their density profile is steeper than the standard dark-matter halos. If dark matter can annihilate or decay into standard particles, e. g., photons, these objects would be the potential astrophysical sources. In order to be consistent with observations, as those from Fermi, the abundance of ultracompact minihalos must be constrained. On the other hand, the formation of these objects has very tight relation with the primordial curvature perturbations on smaller scale, so the fraction of ultracompact minihalos is very important for modern cosmology. In previous works, the studies are focused on the dark-matter annihilation for these objects. But if dark matter is not annihilated, the dark-matter decay is another important possible case. On the other hand, the abundance of ultracompact minihalos is related to many other parameters, such as the mass of dark matter, the decay channels and the density profile of dark-matter halos. One of the important aspects of this work is that we investigate the gamma-ray signals from nearby ultracompact minihalos due to dark-matter decay and another important aspect is to study in detail how the different decay channels and density profiles affect the constraints on the abundance of ultracompact minihalos. Copyright (C) EPLA, 2013
部门归属[Yang, Yu-Peng; Yang, Gui-Lin; Zong, Hong-Shi] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China; [Yang, Yu-Peng] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China; [Yang, Yu-Peng; Yang, Gui-Lin; Zong, Hong-Shi] Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China; [Zong, Hong-Shi] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
关键词Primordial Black-holes Universe Constraints Spectrum Probe
学科领域Physics
资助者National Natural Science Foundation of China [10935001, 11075075] ; National Natural Science Foundation of China [10935001, 11075075] ; National Natural Science Foundation of China [10935001, 11075075] ; National Natural Science Foundation of China [10935001, 11075075]
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收录类别SCI
语种英语
资助者National Natural Science Foundation of China [10935001, 11075075] ; National Natural Science Foundation of China [10935001, 11075075] ; National Natural Science Foundation of China [10935001, 11075075] ; National Natural Science Foundation of China [10935001, 11075075]
WOS记录号WOS:000317918300037
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被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15408
专题理论物理所2013年知识产出
通讯作者Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
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GB/T 7714
Yang, YP,Yang, GL,Zong, HS,et al. Dark-matter decay and the abundance of ultracompact minihalos[J]. EPL,2013,101(6):69001.
APA Yang, YP,Yang, GL,Zong, HS,&Yang, YP .(2013).Dark-matter decay and the abundance of ultracompact minihalos.EPL,101(6),69001.
MLA Yang, YP,et al."Dark-matter decay and the abundance of ultracompact minihalos".EPL 101.6(2013):69001.
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