The sloan digital sky survey discovery of a strongly lensed post-starburst galaxy at z = 0.766

Min Su Shin, Michael A. Strauss, Masamune Oguri, Naohisa Inada, Emilio E. Falco, Tom Broadhurst, James E. Gunn

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We present the first result of a survey for strong galaxy-galaxy lenses in Sloan Digital Sky Survey (SDSS) images. SDSS J082728.70+223256.4 was selected as a lensing candidate using selection criteria based on the color and positions of objects in the SDSS photometric catalog. Follow-up imaging and spectroscopy showed this object to be a lensing system. The lensing galaxy is elliptical at z = 0.349 in a galaxy cluster. The lensed galaxy has the spectrum of a post-starburst galaxy at z = 0.766. The lensing galaxy has an estimated mass of 1.2 × 1012 M , and the corresponding mass-to-light ratio in the B-band is 26M /L inside 1.1 effective radii of the lensing galaxy. Our study shows how catalogs drawn from multi-band surveys can be used to find strong galaxy-galaxy lenses having multiple lens images. Our strong lensing candidate selection based on photometry-only catalogs will be useful in future multi-band imaging surveys such as SNAP and LSST.

Original languageEnglish (US)
Pages (from-to)44-50
Number of pages7
JournalAstronomical Journal
Volume136
Issue number1
DOIs
StatePublished - Jul 1 2008

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxies: general
  • Gravitational lensing

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