Purely radiative perfect fluids
General Relativity and Quantum Cosmology
2008-11-26 v3
Abstract
We study `purely radiative' (div E = div H = 0) and geodesic perfect fluids with non-constant pressure and show that the Bianchi class A perfect fluids can be uniquely characterized --modulo the class of purely electric and (pseudo-)spherically symmetric universes-- as those models for which the magnetic and electric part of the Weyl tensor and the shear are simultaneously diagonalizable. For the case of constant pressure the same conclusion holds provided one also assumes that the fluid is irrotational.
Keywords
Cite
@article{arxiv.gr-qc/0703022,
title = {Purely radiative perfect fluids},
author = {B. Bastiaensen and H. R. Karimian and N. Van den Bergh and L. Wylleman},
journal= {arXiv preprint arXiv:gr-qc/0703022},
year = {2008}
}
Comments
12 pages, minor grammatical changes