Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics

Details Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics

2002-09-28

arxiv.org/abs/astro-ph/0209602v1

Phys.Rev.Lett. 89 (2002) 151301

Astronomy and Astrophysics

Astrophysics

To appear 7 October 2002 issue (Vol. 89, issue 15) of Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.89.151301

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 (CLASS) data. For a flat universe with a classical cosmological constant, we find that the present matter fraction of the critical density is $\Omega_{\rm m}=0.31^{+0.27}_{-0.14}$ (68%) $^{+0.12}_{-0.10}$ (systematic). 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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