Cosmology; Dark Matter; Equations Of State; Gravitational Lenses; Radio Galaxies; Sky Surveys (Astronomy); Statistical Analysis; Universe
Abstract :
[en] 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][SUB]m[/SUB]=0.31[SUB]-0.14[/SUB](sup +0.27) (68%)[SUB]-0.10[/SUB](sup +0.12) (syst). For a flat universe with a constant equation of state for dark energy w=p[SUB]x)(pressure[/SUB]/[rho][SUB]x[/SUB](energy density), we find w<-0.55[SUB]-0.11[/SUB](sup +0.18) (68%).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Chae, K.-H.; University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire
Biggs, A. D.; University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire
Blandford, R. D.; California Institute of Technology, Pasadena
Browne, I. W.; University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire
de Bruyn, A. G.; NFRA
Fassnacht, C. D.; Space Telescope Science Institute
Helbig, Phillip ; University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire
Jackson, N. J.; University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire
King, L. J.; University of Bonn, Auf dem Hugel
Koopmans, L. V.; California Institute of Technology, Pasadena)