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Strong-lensing measurement of the total-mass-density profile out to three effective radii for z similar to 0.5 early-type galaxies
Li R(李瑞)1,2,3,4; Shu, Yiping5,6; Wang JC(王建成)1,2,3,4
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2018-10-01
Volume480Issue:1Pages:431-438
DOI10.1093/mnras/sty1813
Contribution Rank第1完成单位
Indexed BySCI
KeywordGravitational Lensing: Strong Galaxies: Elliptical And Lenticular, Cd Galaxies: Structure
Abstract

We measure the total-mass-density profiles out to three effective radii for a sample of 63 z similar to 0.5, massive early-type galaxies (ETGs) acting as strong gravitational lenses through a joint analysis of lensing and stellar dynamics. The compilation is selected from three galaxy-scale strong-lens samples, namely the Baryon Oscillation Spectroscopic Survey (BOSS) Emission-Line Lens Survey (BELLS), the BELLS for GALaxy-Ly alpha EmitteR sYstems Survey (BELLS GALLERY), and the Strong Lensing Legacy Survey (SL2S). Utilizing the wide source-redshift coverage (0.8-3.5) provided by these three samples, we build a statistically significant ensemble of massive ETGs for which robust mass measurements can be achieved within a broad range of Einstein radii up to three effective radii. Characterizing the three-dimensional total-mass-density distribution by a power-law profile as rho proportional to r(-gamma), we find that the average logarithmic density slope for the entire sample is = 2.000(-0.032)(+0.033) (68 per cent CL) with an intrinsic scatter of delta = 0.180(-0.028)(+0.032). Further parametrizing gamma as a function of redshift z and the ratio of Einstein radius to effective radius R-ein/R-eff, we find that the average density distributions of these massive ETGs become steeper at later cosmic times and at larger radii, with magnitudes d /dz = -0.309(-0.160)(+0.166) and d /d log(10)(R-ein/R-eff) = 0.194(-0.083)(+0.092).

Funding ProjectNational Natural Science Foundation of China[11573060] ; National Natural Science Foundation of China[11661161010] ; National Natural Science Foundation of China[11603032] ; National Natural Science Foundation of China[11333008] ; 973 program[2015CB857003] ; Royal Society - K.C. Wong International Fellowship[NF170995]
Funding OrganizationNational Natural Science Foundation of China[11573060, 11661161010, 11603032, 11333008] ; 973 program[2015CB857003] ; Royal Society - K.C. Wong International Fellowship[NF170995]
Language英语
Subject Area天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000442567900034
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDark-matter Haloes ; Illustris Simulation ; Acs Survey ; Black-holes ; Cosmic Time ; Evolution ; Z-approximate-to-1 ; Dynamics ; Project ; Stellar
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/17868
Collection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
Corresponding AuthorLi R(李瑞); Shu, Yiping; Wang JC(王建成)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China
2.University of Chinese Academy of Sciences, Beijing,100049, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China
5.Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, Jiangsu 210008, China
6.Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li R,Shu, Yiping,Wang JC. Strong-lensing measurement of the total-mass-density profile out to three effective radii for z similar to 0.5 early-type galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,480(1):431-438.
APA Li R,Shu, Yiping,&Wang JC.(2018).Strong-lensing measurement of the total-mass-density profile out to three effective radii for z similar to 0.5 early-type galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,480(1),431-438.
MLA Li R,et al."Strong-lensing measurement of the total-mass-density profile out to three effective radii for z similar to 0.5 early-type galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 480.1(2018):431-438.
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