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Measuring Galaxy Bias from the High-Order Correlation Functions

Published online by Cambridge University Press:  25 May 2016

Y.P. Jing
Y.P. Jing*
Affiliation:
Research Center for the Early Universe, University of Tokyo Bunkyo-ku, Tokyo 113, Japan

Abstract

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In this talk, I will show how to determine the biasing factor b from the high-order moments of galaxies. The determination is based on the analytical modeling of primordial peaks and virialized halos and is independent of the currently unknown density parameter Ω0 and other cosmological parameters. The observed high-oder moments of the APM galaxies require that the biasing factor b be very close to 1, i.e. the optical galaxies are an unbiased tracer of the underlying mass distribution (on quasilinear scale). The theoretical argument can be easily generalized to the three-point correlation function and the bispectrum both of which can used as further observational tests to the important conclusion of b ≈ 1 drawn from the high-order moments. Finally I present our preliminary results of the three-point correlation functions for the Las Campanas Redshift Survey.

Type
IV. Structure Formation and Dark Matter
Information
Symposium - International Astronomical Union , Volume 183: Cosmological Parameters and the Evolution of the Universe , 1999 , pp. 229 - 234
Copyright
Copyright © Kluwer 1999 

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