Show simple item record

dc.creatorOguri, M.
dc.creatorInada, N.
dc.creatorClocchiatti, A.
dc.date.accessioned2019-12-18T18:15:44Z
dc.date.available2019-12-18T18:15:44Z
dc.date.issued2008
dc.identifier.urihttp://hdl.handle.net/10533/237526
dc.description.abstractWe 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 7 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 \Omega_\Lambda=0.74^{+0.11}_{-0.15}(stat.)^{+0.13}_{-0.06}(syst.). Allowing w to be a free parameter we find \Omega_M=0.26^{+0.07}_{-0.06}(stat.)^{+0.03}_{-0.05}(syst.) and w=-1.1\pm0.6(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.
dc.language.isoeng
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relation.urihttps://arxiv.org/abs/0708.0825
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.titleThe Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog
dc.typeArticulo
dc.identifier.folio15010003
dc.relation.projectidinfo:eu-repo/grantAgreement/Fondap/15010003
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.title.journalAstronomical Journal
dc.type.driverinfo:eu-repo/semantics/article
dc.description.shortconicytprogramFONDAP
dc.description.shortconicytprogramFONDAP
dc.type.openaireinfo:eu-repo/semantics/publishedVersion


Files in this item

FilesSizeFormatView

There are no files associated with this item

This item appears in the following Collection(s)

Show simple item record