arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1201.5583astro-ph.CO
收藏

RCS2中的银河级镜头:I.第一个候选强透镜目录

Galaxy scale lenses in the RCS2: I. First Catalog of Candidate Strong Lenses

T. Anguita, L. F. Barrientos, M. D. Gladders, C. Faure, H. K. C Yee, D. G. Gilbank

摘要:

本文介绍了第二次红色序列星系团巡天的第一个星系尺度透镜星表。该目录包含60个透镜系统候选者,由0.2 < z < 0.5的发光红色星系(LRG)透镜组成,周围环绕着蓝色弧或明显的多个背景源图像。该目录是对以前的星系-星系透镜目录的一个有价值的补充,因为它采样了中间透镜红移范围,并由明亮的光源和透镜组成,便于进行详细的分析。质量和质光比的估计显示,透镜星系质量很大(<M>~ 5.5 × 10 e11 M_sun/h),并且富含暗物质(&lt;M/L&gt;~14 M_sun/L_sun,B*h)。尽管从z=0.2到z=0.5观察到质光比略有增加的趋势,但目前的红移和光剖面测量不允许对LRG的质光比演化进行严格的限制。

英文摘要:

We present the first galaxy scale lens catalog from the second Red-Sequence Cluster Survey. The catalog contains 60 lensing system candidates comprised of Luminous Red Galaxy (LRG) lenses at 0.2 < z < 0.5 surrounded by blue arcs or apparent multiple images of background sources. The catalog is a valuable complement to previous galaxy-galaxy lens catalogs as it samples an intermediate lens redshift range and is composed of bright sources and lenses that allow easy follow-up for detailed analysis. Mass and mass-to-light ratio estimates reveal that the lens galaxies are massive (<M>~5.5x10e11 M_sun/h) and rich in dark matter (<M/L>~14 M_sun/L_sun,B*h). Even though a slight increasing trend in the mass-to-light ratio is observed from z=0.2 to z=0.5, current redshift and light profile measurements do not allow stringent constraints on the mass-to-light ratio evolution of LRGs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑