文章基本信息

标题：First-epoch VVDS results: The evolution of the galactic bias up to redshift z=2
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作者：C. Marinoni ; O. Le Fevre ; B. Meneux 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2004
卷号：2004
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Deep surveys of the universe provide the basic ingredients needed to compute the probability distribution function of galaxy fluctuations and to constrain its evolution with cosmic time. When this statistic is combined with analytical CDM predictions for the PDF of mass, useful insights into the biasing function relating mass and galaxy distributions can be obtained. In this paper, we present the Vimos-VLT Deep Survey preliminary measurements of the evolution of the biasing function between galaxy and matter overdensities from galaxies distributed in a deep cone 0:4 < z<1:5 covering 0.40.4 deg. We show that the ratio between the amplitude of galaxy fluctuations and the underlying mass fluctuations declines with cosmic time, and that its evolution rate is a function of redshift: biasing evolution is marginal up to z 0:8 and more pronounced for z & 0:8.