Perturbed Newtonian description of the Lemaître model with non-negligible pressure
Perturbed Newtonian description of the Lemaître model with non-negligible pressure
We study the validity of the Newtonian description of cosmological perturbations using the Lemaitre model, an exact spherically symmetric solution of Einstein's equation. This problem has been investigated in the past for the case of a dust fluid. Here, we extend the previous analysis to the more general case of …