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Constraints on (Omega_M0, Omega_Lambda) from strong lensing in AC 114 | | G. Golse
; J.-P. Kneib
; G. Soucail
; | | Date: |
21 May 2002 | | Subject: | astro-ph | | Affiliation: | LAOMP, Toulouse, France | | Abstract: | We use a strong lensing inversion in the cluster of galaxies AC 114 to derive constraints on the cosmological parameters Omega_M0 and Omega_Lambda. If it is possible to measure spectroscopically the redshifts of many multiple images then one can in principle constrain (Omega_M0,Omega_Lambda) through ratios of angular diameter distances, independently of any external assumptions. Numerical tests on simulated data show rather good constraints from this test. We also use an analytic ``pseudo-elliptical’’ NFW profile in the simulations, following the general new formalism we present. An application to AC 114 favors a flat Universe, an EdS model being marginally ruled out. | | Source: | arXiv, astro-ph/0205357 | | Services: | Forum | Review | PDF | Favorites | |
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