Can one-population density profile reduce the tension between rotation curve data and strong lensing statistics?

doi:10.1093/mnras/sty3243

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	Can one-population density profile reduce the tension between rotation curve data and strong lensing statistics?
	Wang, Lin 1; Chen, Da-Ming 2,3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-02-01
卷号	483 期号:2 页码:2825-2835
关键词	gravitational lensing: strong galaxies: haloes cosmology: theory dark matter
ISSN号	0035-8711
DOI	10.1093/mnras/sty3243
英文摘要	The cosmological hydra-dynamic Evolution and Assembly of Galaxies and their Environment simulation introduces a density distribution of haloes with mass range from dwarf galaxies to galaxy clusters. It can match the observations of rotation curves, e.g. Spitzer Photometry and Accurate Rotation Curves, but fails to satisfy the current strong gravitational lensing statistics. In this paper, we investigate a more general density profile in order to reduce the tension between the two kinds of probes. Specifically, we employ a double power-law profile with the parameters of (alpha, beta, gamma). We found its best-fitting parameters (3.04, 1.39, 1.88), based on strong lensing statistics, e.g. Sloan Digital Sky Survey Quasar Lens Search. Our profile can better match the data at large separation angle than NFW profile. On the other hand, the rotation curves predicted by the best-fitting parameter are much lower than the simulations. For only gamma <= 1.5, can there exist reasonable parameters values to describe the rotation curve observations. Considering the sensitivity of inner slope gamma for strong lensing observations, gamma = 1.88 is the lower limit if the galaxy can be lensed. It is still difficult to reconcile the contradictions between the observations for rotation curves and strong gravitational lensing, even with a much more general form of density profile.
资助项目	National Natural Science Foundation of China[11073023]
WOS关键词	DARK-MATTER HALOES ; STELLAR FEEDBACK ; MASS DENSITY ; MODELS ; CONDENSATION ; CONTRACTION ; GALAXIES ; CLUSTERS ; BARYONS ; CUSPS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000462258200105
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/25684]
专题	中国科学院国家天文台
通讯作者	Wang, Lin
作者单位	1.Henan Univ, Sch Phys & Elect, Kaifeng 475004, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lin,Chen, Da-Ming. Can one-population density profile reduce the tension between rotation curve data and strong lensing statistics?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,483(2):2825-2835.
APA	Wang, Lin,&Chen, Da-Ming.(2019).Can one-population density profile reduce the tension between rotation curve data and strong lensing statistics?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,483(2),2825-2835.
MLA	Wang, Lin,et al."Can one-population density profile reduce the tension between rotation curve data and strong lensing statistics?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483.2(2019):2825-2835.