The Sloan Digital Sky Survey Discovery of a Strongly Lensed Post-Starburst Galaxy at z = 0.766
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 Msun , and the corresponding mass-to-light ratio in the B-band is ~26M sun/L sun 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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- July 2008
- DOI:
- 10.1088/0004-6256/136/1/44
- arXiv:
- arXiv:0804.1487
- Bibcode:
- 2008AJ....136...44S
- Keywords:
-
- galaxies: general;
- gravitational lensing;
- Astrophysics
- E-Print:
- Accepted for publication in AJ