B. J. Barros
In this talk, I will thoroughly explore the phenomenology of dark energy couplings, by exposing two distinct models where dark energy interacts with dark matter. We will journey through three different cosmological phases, so as to study the main influence of the coupling on formation of structure processes. The background cosmology is analysed by resorting to numerical and dynamical system techniques. We will follow closely the linear behaviour of the matter perturbations and test their growth against redshift space distortions data. We also shed some light on the sensitivity of future missions to constrain the dark coupling. Finally, we are going to witness the collapse of matter overdensities by inspecting the physics of the spherical collapse, tracking the evolution of perturbations along the first stages of their nonlinear regime, and compute the number of bound structures formed.
Seminar at the School of Mathematics and Statistics
Sheffield, Reino Unido