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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 421527.0, MPI für Astronomie / Publikationen_mpia
The Sloan Digital Sky Survey quasar lens search. III. Constraints on dark energy from the Third Data Release Quasar Lens Catalog
Authors:Oguri, Masamune; Inada, Naohisa; Strauss, Michael A.; Kochanek, Christopher S.; Richards, Gordon T.; Schneider, Donald P.; Becker, Robert H.; Fukugita, Masataka; Gregg, Michael D.; Hall, Patrick B.; Hennawi, Joseph F.; Johnston, David E.; Kayo, Issha; Keeton, Charles R.; Pindor, Bartosz; Shin, Min-Su; Turner, Edwin L.; White, Richard L.; York, Donald G.; Anderson, Scott F.; Bahcall, Neta A.; Brunner, Robert J.; Burles, Scott; Castander, Francisco J.; Chiu, Kuenley; Clocchiatti, Alejandro; Eisenstein, Daniel; Frieman, Joshua A.; Kawano, Yozo; Lupton, Robert; Morokuma, Tomoki; Rix, Hans-Walter; Scranton, Ryan; Sheldon, Erin Scott
Date of Publication (YYYY-MM-DD):2008
Title of Journal:The Astronomical Journal
Start Page:512
End Page:519
Review Status:Peer-review
Audience:Experts Only
Abstract / Description: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 OmegaLambda = 0.74+0.11 -0.15(stat.)+0.13 -0.06(syst.). Allowing w to be a free parameter we find OmegaM = 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.
Free Keywords:cosmological parameters; cosmology: theory; gravitational lensing
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008AJ....135..512O [ID No:1]
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