Seminar - Fakultät für Physik

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