Constraints on (Omega,Lambda) from strong lensing clusters

Details Constraints on (Omega,Lambda) from strong lensing clusters Constraints on (Omega,Lambda) from strong lensing clusters

2001-09-28

arxiv.org/abs/astro-ph/0109552v1

Astronomy and Astrophysics

Astrophysics

2 pages, includes 4 figures, to appear in the proceedings of the Sesto 2001 International Workshop "Tracing Cosmic Evolution w

Scientific paper

We use three strong lensing clusters to constrain the cosmological parameters Omega_m and Omega_lambda. Recent HST observations of galaxy clusters reveal a large number of multiple images, which are predicted to be at different redshifts. We showed in a previous work that if it is possible to measure spectroscopically the redshift of many multiple images then one can constrain (Omega_m,Omega_lambda) through ratios of angular diameter distances independently of any external assumptions. Using three strong lensing clusters, our combined results lead to tight constraints.

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