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Constraints on cosmological parameters from the analysis of the cosmic lens all sky survey radio-selected gravitational lens statistics |
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| Authors: | Chae K-H Biggs A D Blandford R D Browne I W A De Bruyn A G Fassnacht C D Helbig P Jackson N J King L J Koopmans L V E Mao S Marlow D R McKean J P Myers S T Norbury M Pearson T J Phillips P M Readhead A C S Rusin D Sykes C M Wilkinson P N Xanthopoulos E York T |
| Institution: | University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, United Kingdom. |
| Abstract: | We derive constraints on cosmological parameters and the properties of the lensing galaxies from gravitational lens statistics based on the final Cosmic Lens All Sky Survey data. For a flat universe with a classical cosmological constant, we find that the present matter fraction of the critical density is Omega(m)=0.31(+0.27)(-0.14) (68%)+0.12-0.10 (syst). For a flat universe with a constant equation of state for dark energy w=p(x)(pressure)/rho(x)(energy density), we find w<-0.55(+0.18)(-0.11) (68%). |
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