Contribution of ultracompact dark matter minihalos to the isotropic radio background

	Contribution of ultracompact dark matter minihalos to the isotropic radio background
	Yang, Yupeng 1,2,5; Yang, Guilin 1,5; Huang, Xiaoyuan 3; Chen, Xuelei3 ; Lu, Tan 1,4,5; Zong, Hongshi 1,5,6
刊名	PHYSICAL REVIEW D
	2013-04-22
卷号	87 期号:8
英文摘要	The ultracompact minihalos could be formed during the earlier epoch of the Universe. The dark matter annihilation within them is very strong due to the steep density profile, rho similar to r(-2.25). The high-energy electrons and positrons from the dark matter annihilation can inverse Compton scatter with the background photons, such as cosmic microwave background photons, to acquire higher energy. On the other hand, the synchrotron radiation can also be produced when they meet the magnetic field. In this paper, we study the signals from the ultracompact minihalos (UCMHs) due to the dark matter annihilation for the radio, x-ray and gamma-ray band. We found that for the radio emission, the UCMHs can provide one kind of source for the radio excess observed by ARCADE 2. But the x-ray signals due to the inverse Compton scatter effect or the gamma-ray signals mainly due to the prompt emission from dark matter would exceed the present observations, such as Fermi, COMPTEL, and CHANDRA. We found that the strongest limits on the fraction of UCMHs come from the x-ray observations, and the constraints from the radio data are the weakest. DOI: 10.1103/PhysRevD.87.083519
收录类别	SCI
语种	英语
WOS记录号	WOS:000317866900001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6013]
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.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 5.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China 6.Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yupeng,Yang, Guilin,Huang, Xiaoyuan,et al. Contribution of ultracompact dark matter minihalos to the isotropic radio background[J]. PHYSICAL REVIEW D,2013,87(8).
APA	Yang, Yupeng,Yang, Guilin,Huang, Xiaoyuan,Chen, Xuelei,Lu, Tan,&Zong, Hongshi.(2013).Contribution of ultracompact dark matter minihalos to the isotropic radio background.PHYSICAL REVIEW D,87(8).
MLA	Yang, Yupeng,et al."Contribution of ultracompact dark matter minihalos to the isotropic radio background".PHYSICAL REVIEW D 87.8(2013).