# 28th Texas Symposium on Relativistic Astrophysics

13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

## Large Scale Density profiles surrounding extremas in the density field as cosmological probes

Not scheduled
20m
International Conference Centre Geneva

#### International Conference Centre Geneva

17 Rue de Varembé, 1211 Geneva
Poster

### Speaker

Paul de Fromont (Observatoire de Paris - LUTH)

### Description

In this work I show that we can reconstruct the large scale density profiles surrounding extrema in the density field such as Dark Matter Halos or Cosmic Voids (their exact symmetric in the initial conditions). I show that those profiles can be parametrized in such a way that they conserve some inner properties in their evolution whatever the underlying dynamics. Using N-body simulations of $\Lambda$CDM csomology, we show that this conserved quantity can be used to reconstruct the analytical profile at any redshift. The observed stacked profiles, combined with the peculiar velocity profile, can then be used to constrain directly cosmology and in particular Dark Energy and even the nature of Gravity itself. This approach will find its interest in the upcoming Large Scale Surveys which will probe such cosmological scales with a sufficient statistics.

### Primary author

Paul de Fromont (Observatoire de Paris - LUTH)

### Presentation Materials

There are no materials yet.