Measuring galaxy biasing with gravitational weak lensing

Details Measuring galaxy biasing with gravitational weak lensing Measuring galaxy biasing with gravitational weak lensing

1998-07-03

arxiv.org/abs/astro-ph/9807041v1

Astronomy and Astrophysics

Astrophysics

4 pages, To appear in `Wide-field surveys in cosmology', proceedings of XIV IAP meeting

Scientific paper

Gravitational weak lensing by large scale structures is view as a tool to probe the bias relation between the mass and the light distributions. It is explained how a particular statistic can be used to deproject the 2D mass distribution observed by weak lensing, in order to probe the bias at a given redshift and a given scale. Dependence with the cosmology is written, and observational issues are pointed out, like the importance of the redshift distribution of the galaxies. A signal to noise analysis shows that the scale dependence of the bias can be measured with a rather modest lensing survey size.

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