Lensing clusters of galaxies in the SDSS-Ⅲ

发布时间：2018-02-04 18:40

  本文关键词： galaxies clusters general-gravitational lensing　出处：《Research in Astronomy and Astrophysics》2011年10期 　论文类型：期刊论文

【摘要】：We identify new strong lensing clusters of galaxies from the Sloan Digital Sky Survey III (SDSS DR8) by visually inspecting color images of a large sample of clusters of galaxies. We find 68 new clusters showing giant arcs in addition to 30 known lensing systems. Among 68 cases, 13 clusters are "almost certain" lensing systems with tangential giant arcs, 22 clusters are "probable" and 31 clusters are "possible" lensing systems. We also find two exotic systems with blue rings. The giant arcs have angular separations of 2.0''-25.7'' from the bright central galaxies. We note that the rich clusters are more likely to be lensing systems and the separations between the arcs and the central galaxies increase with cluster richness.
[Abstract]:We identify new strong lensing clusters of galaxies from the Sloan Digital Sky Survey III (SDSS DR8) by visually inspecting color images of a large sample of clusters of galaxies. We find 68 new clusters showing giant arcs in addition to 30 known lensing systems. Among 68 cases, 13 clusters are "almost certain" lensing systems with tangential giant arcs, 22 clusters are "probable" and 31 clusters are "possible" lensing systems. We also find two exotic systems with blue rings. The giant arcs have angular separations of 2.0''-25.7'' from the bright central galaxies. We note that the rich clusters are more likely to be lensing systems and the separations between the arcs and the central galaxies increase with cluster richness.
【基金】：Supported by the National Natural Science Foundation of China(Grant Nos. 10821061, 10833003 and 11103032) Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences and the National Key Basic Research Science Foundation of China (2007CB815403) Funding for SDSS-III has been provided by the Alfred P.Sloan Foundation,the Participating Institutions,the National Science Foundation and the U.S.Department of Energy
【分类号】：P157
【正文快照】： 1 INTRODUCTION Gravitational lensing is the phenomenon of light de?ection by gravitational fields. Strong lensing occurs when a lens and a background source lie very close along the line of sight. Thus, it is a relatively rare phenomenon in the universe.，

本文编号：1490877