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Black hole space-time in dark matter halo
Xu ZY(徐兆意)1,2,3; Hou X(侯贤)1,2,3; Gong XB(龚小波)1,2,3,4; Wang JC(王建成)1,2,3
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2018-09-01
期号9页码:11
DOI10.1088/1475-7516/2018/09/038
产权排序第1完成单位
收录类别SCI
关键词Gr Black Holes Gravity
摘要

For the first time, we obtain the analytical form of a stationary black hole space-time metric in dark matter halos. First, using the relation between the rotational velocity (in the equatorial plane) and the spherically symmetric space-time metric coefficients, we obtain the space-time metric for pure dark matter. By considering the dark matter halo in spherically symmetric space-time as part of the energy-momentum tensors in the Einstein field equation, we then obtain the spherically symmetric black hole solutions with a dark matter halo. Finally, utilizing the Newman-Janis method, we further generalize to rotational black holes. As examples, we obtain the space-time metric of black holes surrounded by Cold Dark Matter and Scalar Field Dark Matter halos, respectively. Our main results regarding the interaction between black holes and dark matter halos are as follows: (i) for both dark matter models, the density profile always produces a "cusp" phenomenon at small scales; (ii) the dark matter halo increases the black hole horizon but shrinks the ergosphere, while the magnitude is small; (iii) dark matter does not change the singularity of black holes. These results are useful to study the interaction of a stationary black hole and dark matter halo system. Particularly, the "cusp" produced at the 0 similar to 1 kpc scale would be observable in the Milky Way. Perspectives on future work regarding the applications of our results in astrophysics are also briefly discussed.

资助项目National Natural Science Foundation of China[11503078] ; National Natural Science Foundation of China[11573060] ; National Natural Science Foundation of China[11661161010]
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
ISSN1475-7516
URL查看原文
WOS记录号WOS:000445609800004
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
关键词[WOS]Rotation Curves ; Density Profile ; Spiral Galaxies ; Galactic-center ; Annihilation
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17920
专题高能天体物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Xu ZY(徐兆意); Hou X(侯贤); Gong XB(龚小波); Wang JC(王建成)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216 P.R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216 P.R. China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012 P.R. China
4.University of Chinese Academy of Sciences, Beijing, 100049 P.R. China
推荐引用方式
GB/T 7714
Xu ZY,Hou X,Gong XB,et al. Black hole space-time in dark matter halo[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2018(9):11.
APA Xu ZY,Hou X,Gong XB,&Wang JC.(2018).Black hole space-time in dark matter halo.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),11.
MLA Xu ZY,et al."Black hole space-time in dark matter halo".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2018):11.
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