Speaker: Cornelius Rampf

Abstract:

In this talk I will report about the fundamental role of the observer in relativistic structure formation. I investigate how relativistic effects affect the interpretation of observations and numerical simulations. My essential objective is to deliver a direct connection between Newtonian simulations and general relativity, i.e., whether the particle’s positions have to be updated/displaced according to the relativistic constraints. The key analytic technique for these considerations is the Lagrangian perturbation theory, which I will also review in this talk.