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Title:
Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics
Authors:
Chae, K.-H.; Biggs, A. D.; Blandford, R. D.; Browne, I. W.; de Bruyn, A. G.; Fassnacht, C. D.; Helbig, P.; Jackson, N. J.; King, L. J.; Koopmans, L. V.; Mao, S.; Marlow, D. R.; McKean, J. P.; Myers, S. T.; Norbury, M.; Pearson, T. J.; Phillips, P. M.; Readhead, A. C.; Rusin, D.; Sykes, C. M.; Wilkinson, P. N.; Xanthopoulos, E.; York, T.
Affiliation:
AA(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire), AB(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire), AC(California Institute of Technology, Pasadena), AD(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire), AE(NFRA), AF(Space Telescope Science Institute), AG(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire), AH(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire), AI(University of Bonn, Auf dem Hugel), AJ(California Institute of Technology, Pasadena)
Publication:
Physical Review Letters, vol. 89, p. 151301 (PhRvL Homepage)
Publication Date:
10/2002
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COSMOLOGY, DARK MATTER, EQUATIONS OF STATE, GRAVITATIONAL LENSES, RADIO GALAXIES, SKY SURVEYS (ASTRONOMY), STATISTICAL ANALYSIS, UNIVERSE
DOI:
10.1103/PhysRevLett.89.151301
Bibliographic Code:
2002PhRvL..89o1301C

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=0.31-0.14(sup +0.27) (68%)-0.10(sup +0.12) (syst). For a flat universe with a constant equation of state for dark energy w=px)(pressure/[rho]x(energy density), we find w<-0.55-0.11(sup +0.18) (68%).
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