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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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 ( 5.5 × 10 11 [M h -1]) and rich in dark matter ( 14 [M/L , 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.

Original languageEnglish
Article number129
JournalAstrophysical Journal
Volume748
Issue number2
DOIs
Publication statusPublished - 1 Apr 2012

Keywords

  • dark matter
  • galaxies: elliptical and lenticular, cD
  • galaxies: evolution
  • gravitational lensing: strong

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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