Description
These last years, cosmic voids have been used as original probes for
gravity and dark energy. This is motivated by the fact that these
regions are expected to be safe from both baryonic and non linear
physics unlike galaxy clusters or DM halos. However, these approaches
are limited by the absence of a fully consistent model for cosmic voids.
In this talk, I will introduce a new model that provides predictions for
both shape and statistics of these regions for any cosmology and
redshift. Using this model, I will discuss their sensitivity to modified
gravity such as f(R) theory and discuss the possibilities to constraint
efficiently the nature of gravity in upcoming surveys.