Fakultät für Physik Seminar Cornelius Rampf Heidelberg Relativistic Interpretation of Newtonian Simulations for Cosmic Structure Formation Newtonian (N-body) simulations solve the gravitational clustering of matter in the Newtonian limit where effects from General Relativity (GR), such as the gravitational coupling of matter to radiation (=photons and neutrinos), are assumed to vanish. In this talk I show that at sufficiently late times (z < 50), conventional Newtonian simulations include all first-order relativistic corrections, whereas for simulations initialised at earlier times such as z = 200[800], the matter power spectrum receives GR corrections of up to 4%[20%]. I show how such GR effects can be effectively incorporated within Newtonian simulations, and how the underlying space-time of such pseudo-relativistic simulations can be determined to arbitrary order in perturbation theory. Dienstag, 07.06.2016, 14:15 Uhr Ort: D5-153
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