Le 13 novembre 2014
De 11h00 à 12h00
Francesco KITAURA
AIP Potsdam
The present-day mass density field contains information about the fundamental pillars of cosmology. It is a mixture and cross-talk between the primordial density fluctuations, the law of gravity and the value of cosmological parameters. Disentangling all these ingredients and extracting useful information about them is not a trivial task. Nonlinear processes are in place, in which gravity couples perturbations on different scales. Additional complications are introduced by the systematics of the observable, in our case of study: galaxies. We have to deal in general with nonlinear, non-local and scale dependent biased tracers of the underlying density field. Moreover, galaxies have peculiar motions induced by the surrounding matter, which introduce redshift space distortions, which are degenerate in the two-point statistics with the galaxy bias. I will present combined perturbation theory and statistical methods to model the Large Scale Structure and produce accurate galaxy catalogues and show how these models can be applied for inference analysis. Finally I will show a number of applications on the Local Universe.