Constraints on cosmological parameters from the analysis of the cosmic lens all sky survey radio-selected gravitational lens statistics

K-H Chae; A D Biggs; R D Blandford; I W A Browne; A G De Bruyn; C D Fassnacht; P Helbig; N J Jackson; L J King; L V E Koopmans; S Mao; D R Marlow; J P McKean; S T Myers; M Norbury; T J Pearson; P M Phillips; A C S Readhead; D Rusin; C M Sykes; P N Wilkinson; E Xanthopoulos; T York

doi:10.1103/PhysRevLett.89.151301

Constraints on cosmological parameters from the analysis of the cosmic lens all sky survey radio-selected gravitational lens statistics

Phys Rev Lett. 2002 Oct 7;89(15):151301. doi: 10.1103/PhysRevLett.89.151301. Epub 2002 Sep 20.

Affiliation

¹ University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, United Kingdom.

PMID: 12365978
DOI: 10.1103/PhysRevLett.89.151301

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%).