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astro-ph1998
Constraining from weak lensing in clusters: the triplet method
L. Gautret, B. Fort, Y. Mellier
We present a new geometrical method which uses weak gravitational lensing effects in clusters to constrain the cosmological parameters Omega and Lambda. On each background galaxy,…
astro-ph1998
Gravitational Lensing and Tests of the Cosmological Constant
B. Fort, Y. Mellier
The case for a flat Cold Dark Matter model with a positive cosmological constant has been recently strongly advocated by some theoreticians. In this paper we give the observers…