Stability of the isotropic pressure condition
General Relativity and Quantum Cosmology
2020-05-27 v1
Abstract
We investigate the conditions for the (in)stability of the isotropic pressure condition in collapsing spherically symmetric, dissipative fluid distributions. It is found that dissipative fluxes, and/or energy density inhomogeneities and/or the appearance of shear in the fluid flow, force any initially isotropic configuration to abandon such a condition, generating anisotropy in the pressure. To reinforce this conclusion we also present some arguments concerning the axially symmetric case. The consequences ensuing our results are analyzed.
Cite
@article{arxiv.2005.06358,
title = {Stability of the isotropic pressure condition},
author = {L. Herrera},
journal= {arXiv preprint arXiv:2005.06358},
year = {2020}
}
Comments
10 pages Revtex. Published in Phys. Rev. D