The Jeans Mechanism and Bulk-Viscosity Effects
General Relativity and Quantum Cosmology
2012-05-28 v3 Cosmology and Nongalactic Astrophysics
Abstract
In this paper we study the gravitational instability in presence of viscosity. In particular, the standard Jeans Mechanism is analyzed taking into account bulk-viscosity effects in the first-order Newtonian dynamics. We show how the perturbation evolution is damped by dissipative processes and the top-down fragmentation mechanism is suppressed for strong viscous effects. The critical value of the Jeans Mass remains unchanged also in presence of bulk viscosity.
Keywords
Cite
@article{arxiv.0903.4122,
title = {The Jeans Mechanism and Bulk-Viscosity Effects},
author = {Nakia Carlevaro and Giovanni Montani},
journal= {arXiv preprint arXiv:0903.4122},
year = {2012}
}
Comments
Proceedings of The 3rd Stueckelberg Workshop on Relativistic Field Theories