Measurement of the bias parameter from weak lensing

Details Measurement of the bias parameter from weak lensing Measurement of the bias parameter from weak lensing

2001-07-20

arxiv.org/abs/astro-ph/0107413v1

Astronomy and Astrophysics

Astrophysics

revised version submitted to ApJ Letters. 4 pages, 2 figures

Scientific paper

10.1086/323568

We have measured the correlation between the lensing signal induced by (dark) matter and number counts of galaxies on scales ranging from 0.15-3.0 h_{50}^{-1} Mpc (which correspond to aperture radii of 1-15 arcminutes). This provides a direct probe of the scale dependence of the ratio of the classical bias parameter b and the galaxy-mass correlation coefficient r. The results presented here are based on 16 deg^2 of R_C band data taken with the CFHT as part of the Red-Sequence Cluster Survey. We used a sample of lens galaxies with 19.5

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