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Title:
Sloan Digital Sky Survey Spectroscopic Lens Search. I. Discovery of Intermediate-Redshift Star-forming Galaxies behind Foreground Luminous Red Galaxies
Authors:
Bolton, Adam S.; Burles, Scott; Schlegel, David J.; Eisenstein, Daniel J.; Brinkmann, J.
Affiliation:
AA(Department of Physics and Center for Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 ), AB(Department of Physics and Center for Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 ), AC(Princeton University Observatory, Peyton Hall, Princeton, NJ 08544-1001 ), AD(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AE(Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349.)
Publication:
The Astronomical Journal, Volume 127, Issue 4, pp. 1860-1882. (AJ Homepage)
Publication Date:
04/2004
Origin:
UCP
Astronomy Keywords:
Galaxies: Elliptical and Lenticular, cD, Galaxies: Starburst, Cosmology: Gravitational Lensing
DOI:
10.1086/382714
Bibliographic Code:
2004AJ....127.1860B

Abstract

We present a catalog of 49 spectroscopic strong gravitational lens candidates selected from a Sloan Digital Sky Survey sample of 50,996 luminous red galaxies. Potentially lensed star-forming galaxies are detected through the presence of background oxygen and hydrogen nebular emission lines in the spectra of these massive foreground galaxies. This multiline selection eliminates the ambiguity of single-line identification and provides a very promising sample of candidate galaxy-galaxy lens systems at low to intermediate redshift, with foreground redshifts ranging from 0.16 to 0.49 and background redshifts from 0.25 to 0.81. Any lenses confirmed within our sample would be important new probes of early-type galaxy mass distributions, providing complementary constraints to those obtained from currently known lensed high-redshift quasars.

Based in part on observations obtained with the 6.5 m Clay telescope of the Magellan Consortium.

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