Oguri, Masamune and Inada, Naohisa and Strauss, Michael A. and Kochanek, Christopher S. and Richards, Gordon T. and Schneider, Donald P. and Becker, Robert H. and Fukugita, Masataka and Gregg, Michael D. and Hall, Patrick B. and Hennawi, Joseph F. and Johnston, David E. and Kayo, Issha and Keeton, Charles R. and Pindor, Bartosz and Shin, Min-Su and Turner, Edwin L. and White, Richard L. and York, Donald G. and Anderson, Scott F. and Bahcall, Neta A. and Brunner, Robert J. and Burles, Scott and Castander, Francisco J. and Chiu, Kuenley and Clocchiatti, Alejandro and Eisenstein, Daniel and Frieman, Joshua A. and Kawano, Yozo and Lupton, Robert and Morokuma, Tomoki and Rix, Hans-Walter and Scranton, Ryan and Sheldon, Erin Scott (2008) The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on dark energy from the third data release quasar lens catalog. Astronomical Journal, 135 (2). pp. 512-519. ISSN 0004-6256 http://resolver.caltech.edu/CaltechAUTHORS:20090504-105118535
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Abstract
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the expected number of quasars lensed by early-type galaxies and their image separation distribution assuming a flat universe, which is then compared with seven lenses found in the SDSS Data Release 3 to derive constraints on dark energy under strictly controlled criteria. For a cosmological constant model (w = −1) we obtain ΩΛ = 0.74^+(0.11)_(−0.15)(stat.)^(+0.13)_(−0.06)(syst.). Allowing w to be a free parameter we find ΩM = 0.26^(+0.07)_(−0.06)(stat.)^(+0.03)_(−0.05)(syst.) and w = −1.1 ± 0.6(stat.)^(+0.3)_(−0.5)(syst.) when combined with the constraint from the measurement of baryon acoustic oscillations in the SDSS luminous red galaxy sample. Our results are in good agreement with earlier lensing constraints obtained using radio lenses, and provide additional confirmation of the presence of dark energy consistent with a cosmological constant, derived independently of type Ia supernovae.
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| Additional Information: | © 2008 The American Astronomical Society. Received 2007 August 5; accepted 2007 October 29; published 2008 January 15. We thank Kyu-Hyun Chae for useful discussions. This work was supported in part by the Department of Energy contract DEAC02- 76SF00515. N.I. acknowledges supports from the Japan Society for the Promotion of Science and the Special Postdoctoral Researcher Program of RIKEN. M.A.S. acknowledges support from NSF grant AST 03-07409. A portion of this work was also performed under the auspices of the U.S. Department of Energy, National Nuclear Security Administration by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48. I.K. acknowledges supports from Ministry of Education, Culture, Sports, Science, and Technology, Grant-in-Aid for Encouragement of Young Scientists (No. 17740139), and Grant-in-Aid for Scientific Research on Priority Areas No. 467 “Probing the Dark Energy through an Extremely Wide & Deep Survey with Subaru Telescope”. A.C. acknowledges the support of CONICYT, Chile, under grant FONDECYT 1051061. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS Web site is http://www.sdss.org/. The SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions. The Participating Institutions are the American Museum of Natural History, Astrophysical Institute Potsdam, University of Basel, Cambridge University, Case Western Reserve University, University of Chicago, Drexel University, Fermilab, the Institute for Advanced Study, the Japan Participation Group, Johns Hopkins University, the Joint Institute for Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, Ohio State University, University of Pittsburgh, University of Portsmouth, Princeton University, the United States Naval Observatory, and the University of Washington. | ||||||||||||||||||||||||||||||
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| Subject Keywords: | cosmological parameters; cosmology: theory; gravitational lensing | ||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20090504-105118535 | ||||||||||||||||||||||||||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20090504-105118535 | ||||||||||||||||||||||||||||||
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| ID Code: | 14145 | ||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||||||||||||||
| Deposited On: | 26 Jun 2009 16:43 | ||||||||||||||||||||||||||||||
| Last Modified: | 26 Dec 2012 10:59 |
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