Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 671, Issue 1, Pages L9-L12Publisher
IOP PUBLISHING LTD
DOI: 10.1086/524948
Keywords
galaxies : evolution; galaxies : structure; gravitational lensing
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Funding
- STFC [PP/E00105X/1, ST/F001967/1, PP/E001068/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E00105X/1, PP/E001068/1, ST/F001967/1] Funding Source: researchfish
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We report the discovery of an almost complete (similar to 300 degrees) 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.
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