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Two new gravitationally lensed double quasars from the Sloan Digital Sky Survey
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|Title: ||Two new gravitationally lensed double quasars from the Sloan Digital Sky Survey|
|Authors: ||Inada, Naohisa|
Becker, Robert H.
White, Richard L.
Kochanek, Christopher S.
Hall, Patrick B.
Schneider, Donald P.
York, Donald G.
Richards, Gordon T.
|Keywords: ||Gravitational lensing;Quasars: individual|
|Issue Date: ||Jan-2007|
|Publisher: ||University of Chicago Press|
|Citation: ||Astronomical Journal, 133(1): pp. 206-213.|
|Abstract: ||We report the discoveries of the two-image gravitationally lensed quasars SDSS J074653.03+440351.3 and
SDSS J140624.82+612640.9, selected from the Sloan Digital Sky Survey (SDSS). SDSS J0746+4403, which will
be included in our lens sample for statistics and cosmology, has a source redshift of zs ¼ 2:00, an estimated lens
redshift of zl 0:3, and an image separation of 1.0800. SDSS J1406+6126 has a source redshift of zs ¼ 2:13, a
spectroscopically measured lens redshift of zl ¼ 0:27, and an image separation of 1.9800.We find that the two quasar
images of SDSS J1406+6126 have different intervening Mg ii absorption strengths, which are suggestive of large
variations of absorbers on kiloparsec scales. The positions and fluxes of both lensed quasar systems are easily reproduced
by simple mass models with reasonable parameter values. These objects bring to 18 the number of lensed
quasars that have been discovered from the SDSS data.|
|Appears in Collections:||Faculty Research and Publications (Physics)|
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