Mathematics – Probability
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004bdmh.confe...4m&link_type=abstract
"Proceedings of "Baryons in Dark Matter Halos". Novigrad, Croatia, 5-9 Oct 2004. Editors: R. Dettmar, U. Klein, P. Salucci. Publ
Mathematics
Probability
Scientific paper
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 0.4×0.4 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.
Guzzo Luigi
Ilbert Olivier
Iovino Angela
Le Fèvre Oliver
Marinoni Christian
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