Cosmic shear surveys

Details Cosmic shear surveys Cosmic shear surveys

2001-01-09

arxiv.org/abs/astro-ph/0101130v1

Astronomy and Astrophysics

Astrophysics

Latex, 7 pages. To appear in the ESO Proceedings ``Deep Fields'', Garching Oct 9-12, 2000

Scientific paper

10.1007/10854354_68

Gravitational weak shear produced by large-scale structures of the universe induces a correlated ellipticity distribution of distant galaxies. The amplitude and evolution with angular scale of the signal depend on cosmological models and can be inverted in order to constrain the power spectrum and the cosmological parameters. We present our recent analysis of 50 uncorrelated VLT fields and the very first constrains on ($\Omega_m,\sigma_8$) and the nature of primordial fluctuations based on the join analysis of present-day cosmic shear surveys.

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