05/26/02
Menard Brice	IAP
98 bld Arago	SF2A- PNC- ASHRA-
75014	Paris, France

Presentation 1 : Oral
Cosmic magnification (PNC)
Brice Menard, Matthias Bartelmann, Yannick Mellier
Gravitational lensing by large-scale structures induces correlations between physically uncorrelated background quasars and foreground galaxies. Two- and three-point quasar-galaxy correlation functions allow the determination of cosmological parameters and the galaxy bias factor, its dependence on scale, redshift, and galaxy morphology. Signal-to-noise estimates show that data from surveys like SDSS should already be sufficient for such a measurement at a high significance.

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