Cosmological Constraints From Weak Lensing

Details Cosmological Constraints From Weak Lensing Cosmological Constraints From Weak Lensing

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.297l&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

We develop, in the spirit of a ``thought experiment,'' a method to constrain the geometry of the universe from weak lensing, provided that both the shapes and the redshifts of the source background galaxies are available. The method, applied to a sufficiently massive cluster, yields both the cluster mass distribution and the cosmological parameters of the model used (Omega and Omega_Lambda in Friedmann-Lemaitre cosmological model). Cosmological information are obtained by measuring the variation in strength of the lens with redshift. The method should provide significant constraints if applied to NGST observations.

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