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.
