Advances in Theoretical and Mathematical Physics
Volume 16 (2012)
The fast Newtonian limit for perfect fluids
Pages: 359 – 391
We prove the existence of a large class of dynamical solutions to the Einstein–Euler equations for which the fluid density and spatial three-velocity converge to a solution of the Poisson–Euler equations of Newtonian gravity. The results presented here generalize those of  to allow for a larger class of initial data. As in , the proof is based on a non-local symmetric hyperbolic formulation of the Einstein–Euler equations, which contain a singular parameter $\ep=v_T/c$ with $v_T$ a characteristic speed associated to the fluid and $c$ the speed of light. Energy and dispersive estimates on weighted Sobolev spaces are the main technical tools used to analyze the solutions in the singular limit $\ep\searrow 0$.