The Cosmic Horseshoe: Discovery of an Einstein Ring around a Giant Luminous Red Galaxy
Open Access
- 13 November 2007
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 671 (1) , L9-L12
- https://doi.org/10.1086/524948
Abstract
We report the discovery of an almost complete (~300°) Einstein ring of diameter 10'' in Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5). Spectroscopic data from the 6 m telescope of the Special Astrophysical Observatory reveal that the deflecting galaxy has a line-of-sight velocity dispersion in excess of 400 km s-1 and a redshift of 0.444, while the source is a star-forming galaxy with a redshift of 2.379. From its color, luminosity, and velocity dispersion, we argue that this is the most massive galaxy lens hitherto discovered.Keywords
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This publication has 25 references indexed in Scilit:
- The 8 O'Clock Arc: A Serendipitous Discovery of a Strongly Lensed Lyman Break Galaxy in the SDSS DR4 Imaging DataThe Astrophysical Journal, 2007
- The Stellar, Gas, and Dynamical Masses of Star‐forming Galaxies atz∼ 2The Astrophysical Journal, 2006
- The Mass‐Metallicity Relation atz≳2The Astrophysical Journal, 2006
- A Search for the Most Massive Galaxies: Double Trouble?The Astronomical Journal, 2006
- The Sloan Lens ACS Survey. I. A Large Spectroscopically Selected Sample of Massive Early‐Type Lens GalaxiesThe Astrophysical Journal, 2006
- The Stellar Content of Nearby Star‐forming Galaxies. III. Unravelling the Nature of the Diffuse Ultraviolet LightThe Astrophysical Journal, 2005
- Discovery of a high-redshift Einstein ringAstronomy & Astrophysics, 2005
- The SCORPIO universal focal reducer of the 6-m telescopeAstronomy Letters, 2005
- Early-type Galaxies in the Sloan Digital Sky Survey. II. Correlations between ObservablesThe Astronomical Journal, 2003
- The Dust Content and Opacity of Actively Star‐forming GalaxiesThe Astrophysical Journal, 2000