Effects of fermionic dark matter on properties of neutron stars

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	Effects of fermionic dark matter on properties of neutron stars
	向仟飞;Xiang, QF; Jiang, WZ; Zhang, DR; Yang, RY
刊名	PHYSICAL REVIEW C
	2014
卷号	89 期号:2 页码:25803
英文摘要	By assuming that only gravitation acts between dark matter (DM) and normalmatter (NM), we study the effects of fermionic DM on the properties of neutron stars using the two-fluid Tolman-Oppenheimer-Volkoff formalism. It is found that the mass-radius relationship of the DM admixed neutron stars (DANSs) depends sensitively on the mass of DM candidates, the amount of DM, and interactions among DM candidates. The existence of DM in DANSs results in a spread of mass-radius relationships that cannot be interpreted with a unique equilibrium sequence. In some cases, the DM distribution can surpass the NM distribution to form a DM halo. In particular, it is favorable to form an explicit DM halo, provided the repulsion of DM exists. It is interesting to find that the difference in particle number density distributions in DANSs and consequently in star radii caused by various density dependencies of nuclear symmetry energy tends to disappear as long as the repulsion of accumulated DM is sufficient. These phenomena indicate that the admixture of DM in neutron stars can significantly affect the astrophysical extraction of nuclear EOS by virtue of neutron star measurements. In addition, the effect of the DM admixture on the star maximum mass is also investigated.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000332164300005
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225257]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	向仟飞；Xiang, QF,Jiang, WZ,Zhang, DR,et al. Effects of fermionic dark matter on properties of neutron stars[J]. PHYSICAL REVIEW C,2014,89(2):25803.
APA	向仟飞；Xiang, QF,Jiang, WZ,Zhang, DR,&Yang, RY.(2014).Effects of fermionic dark matter on properties of neutron stars.PHYSICAL REVIEW C,89(2),25803.
MLA	向仟飞；Xiang, QF,et al."Effects of fermionic dark matter on properties of neutron stars".PHYSICAL REVIEW C 89.2(2014):25803.