Speaker
Dr
Linda Blot
(Kavli IPMU)
Description
Clustering dark energy is a class of models in which the speed of propagation of the perturbations in the dark energy component is small compared to the speed of light, causing the perturbations to collapse on scales inside the horizon and affecting the process of cosmic structure formation. This presentation will go over the effects we expect to detect in cosmological observations and how we can use them to constrain the speed of sound of dark energy perturbations. I will then present a numerical approach to simulate such scenarios using the effective fluid description and I will show some preliminary results of the implementation of these methods in a cosmological simulation code.