Assessing the effect of lens mass model in cosmological application with updated galaxy-scale strong gravitational lensing sample

doi:10.1093/mnras/stz1902

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	Assessing the effect of lens mass model in cosmological application with updated galaxy-scale strong gravitational lensing sample
	Chen, Yun 1; Li, Ran 1,2; Shu, Yiping 3; Cao, Xiaoyue 1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-09-01
卷号	488 期号:3 页码:3745-3758
关键词	gravitational lensing: strong Galaxies: structure cosmological parameters cosmology: observations
ISSN号	0035-8711
DOI	10.1093/mnras/stz1902
英文摘要	By comparing the dynamical and lensing masses of early-type lens galaxies, one can constrain both the cosmological parameters and the density profiles of galaxies. We explore the constraining power on cosmological parameters and the effect of the lens mass model in this method with 161 galaxy-scale strong lensing systems, which is currently the largest sample with both high-resolution imaging and stellar dynamical data. We assume a power-law mass model for the lenses, and consider three different parametrizations for gamma (i.e. the slope of the total mass density profile) to include the effect of the dependence of gamma on redshift and surface mass density. When treating delta (i.e. the slope of the luminosity density profile) as a universal parameter for all lens galaxies, we find the limits on the cosmological parameter Omega(m). are quite weak and biased, and also heavily dependent on the lens mass model in the scenarios of parametrizing gamma with three different forms. When treating delta as an observable for each lens, the unbiased estimate of Omega(m) can be obtained only in the scenario of including the dependence of gamma on both the redshift and the surface mass density, that is Omega(m) = 0.381(-0.154)(+0.185) at 68 per cent confidence level in the framework of a flat Lambda CDM model. We conclude that the significant dependencies of gamma on both the redshift and the surface mass density, as well as the intrinsic scatter of delta among the lenses, need to be properly taken into account in this method.
资助项目	National Natural Science Foundation of China[11703034] ; National Natural Science Foundation of China[11573031] ; National Natural Science Foundation of China[71773032] ; National Natural Science Foundation of China[718513] ; NAOC Nebula Talents Program ; National Key Program for Science and Technology Research and Development of China[2017YFB0203300] ; Royal Society - K.C. Wong International Fellowship[NF170995]
WOS关键词	SPECTROSCOPIC TARGET SELECTION ; DIGITAL SKY SURVEY ; DARK ENERGY ; ACS SURVEY ; INTERNAL STRUCTURE ; STELLAR ; CONSTRAINTS ; STATISTICS ; EVOLUTION ; SEPARATIONS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000485158400054
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Program for Science and Technology Research and Development of China ; National Key Program for Science and Technology Research and Development of China ; Royal Society - K.C. Wong International Fellowship ; Royal Society - K.C. Wong International Fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Program for Science and Technology Research and Development of China ; National Key Program for Science and Technology Research and Development of China ; Royal Society - K.C. Wong International Fellowship ; Royal Society - K.C. Wong International Fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Program for Science and Technology Research and Development of China ; National Key Program for Science and Technology Research and Development of China ; Royal Society - K.C. Wong International Fellowship ; Royal Society - K.C. Wong International Fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Program for Science and Technology Research and Development of China ; National Key Program for Science and Technology Research and Development of China ; Royal Society - K.C. Wong International Fellowship ; Royal Society - K.C. Wong International Fellowship
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27671]
专题	中国科学院国家天文台
通讯作者	Chen, Yun
作者单位	1.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 3.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
推荐引用方式 GB/T 7714	Chen, Yun,Li, Ran,Shu, Yiping,et al. Assessing the effect of lens mass model in cosmological application with updated galaxy-scale strong gravitational lensing sample[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,488(3):3745-3758.
APA	Chen, Yun,Li, Ran,Shu, Yiping,&Cao, Xiaoyue.(2019).Assessing the effect of lens mass model in cosmological application with updated galaxy-scale strong gravitational lensing sample.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,488(3),3745-3758.
MLA	Chen, Yun,et al."Assessing the effect of lens mass model in cosmological application with updated galaxy-scale strong gravitational lensing sample".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 488.3(2019):3745-3758.