Nonlinear Cosmology Program 2006 @ Observatoire de la Côte d'Azur

Nonlinear Cosmology Workshop

Nice, January 25–27, 2006


9 billion Years of Gravity at Work in the Cosmic Factory

Christian Marinoni

Mapping the galaxy density fluctuations in the distant universe and picturing their time evolution is challenging and, up to now, has fallen into the realm of numerical simulations. I will report on the VIMOS VLT Deep Survey which is charting the distribution of visible matter over an unprecedented volume covering ~70% of the visible radius of the Universe. A rich three-dimensional texture including massive structures emerges also at such early times, indicating that the galaxy large-scale spatial distribution represents a stable configuration through cosmic epochs. I will show how we have quantified the distribution of luminous objects via their probability distribution function and measured, for the first time, the evolution of the non-linear galaxy bias between galaxies and matter. Finally I will show how the evolution of the low order moments of the galaxy PDF (variance and skewness) reveals the expected time-dependent fingerprint of gravitational instability in the high redshift universe.


Last modified: Mon Jan 30 17:58:01 MSK 2006