Actions for Discovery of two gravitationally lensed quasars with image separations of 3 arcseconds from the Sloan Digital Sky Survey [electronic resource].

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Discovery of two gravitationally lensed quasars with image separations of 3 arcseconds from the Sloan Digital Sky Survey [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
22 pages : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We report the discovery of two doubly-imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789 and with image separations of 2.86'' and 2.90'', respectively. The objects were selected as lens candidates from the Sloan Digital Sky Survey (SDSS). Based on the identical nature of the spectra of the two quasars in each pair and the identification of the lens galaxies, we conclude that the objects are gravitational lenses. The lenses are complicated; in both systems there are several galaxies in the fields very close to the quasars, in addition to the lens galaxies themselves. The lens modeling implies that these nearby galaxies contribute significantly to the lens potentials. On larger scales, we have detected an enhancement in the galaxy density near SDSS J100128.61+502756.9. The number of lenses with image separation of ≈ 3'' in the SDSS already exceeds the prediction of simple theoretical models based on the standard Lambda-dominated cosmology and observed velocity function of galaxies.
Report Numbers
E 1.99:fermilab-pub-04-505-a
fermilab-pub-04-505-a
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Note
Published through SciTech Connect.
11/01/2004.
"fermilab-pub-04-505-a"
"arXiv eprint number astro-ph/0411250"
Astrophysical Journal 622 ISSN 0004-637X; ASJOAB FT
Johnston, David E.; Strauss, Michael A.; Bahcall, Neta A.; Frieman, Joshua A.; Schneider, Donald P.; Richards, Gordon T.; Hennawi, Joseph F.; Becker, Robert H.; Brinkmann, Jonathan; Inada, Naohisa; Oguri, Masamune; Gregg, Michael D.; York, Donald G. /Princeton U. Observ. /T; Hall, Patrick B.; Pindor, Bartosz; Castander, Francisco J.; Rix, Hans-Walter; Brunner, Robert J.
Funding Information
AC02-76CH03000
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