Strong-lensing measurement of the total-mass-density profile out to three effective radii for z similar to 0.5 early-type galaxies
文献类型:期刊论文
作者 | Li, Rui1,2,3,4; Shu, Yiping5,6; Wang, Jiancheng1,2,3,4 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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出版日期 | 2018-10-01 |
卷号 | 480期号:1页码:431-438 |
关键词 | gravitational lensing: strong galaxies: elliptical and lenticular, cD galaxies: structure |
ISSN号 | 0035-8711 |
DOI | 10.1093/mnras/sty1813 |
英文摘要 | 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). |
WOS关键词 | DARK-MATTER HALOES ; ILLUSTRIS SIMULATION ; ACS SURVEY ; BLACK-HOLES ; COSMIC TIME ; EVOLUTION ; Z-APPROXIMATE-TO-1 ; DYNAMICS ; PROJECT ; STELLAR |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
WOS记录号 | WOS:000442567900034 |
出版者 | OXFORD UNIV PRESS |
源URL | [http://libir.pmo.ac.cn/handle/332002/21522] ![]() |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Li, Rui; Shu, Yiping; Wang, Jiancheng |
作者单位 | 1.Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China 5.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 6.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England |
推荐引用方式 GB/T 7714 | Li, Rui,Shu, Yiping,Wang, Jiancheng. 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, Rui,Shu, Yiping,&Wang, Jiancheng.(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, Rui,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. |
入库方式: OAI收割
来源:紫金山天文台
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