Speaker: Robyn Munoz
Title: Numerical relativity cosmological simulations from the curvature perturbation
Abstract: We implement 3-dimensional numerical relativity simulations of an inhomogeneous universe using the dust perfect fluid approximation. We perturb the $Lambda$CDM model in the synchronous comoving gauge by defining the comoving curvature perturbation $\mathcal{R}_c$ as a single mode sinusoidal perturbation and then use the Einstein Toolkit code to evolve the system. This scenario is explored in order to determine the validity of the spherically symmetric Top-Hat model that we find to be a good approximation at the peak of the over density where the evolution is independent of it’s environment. We also compare to E.Bentivegna and M.Bruni’s (2016) simulations where we find the presence of the decaying mode to significantly slow down the virialisation/simulation crash of the over-density.
