Nonlinear evolution of r-modes in rotating relativistic stars
Astrophysics
2007-05-23 v1
Abstract
A numerical study of nonlinear r-modes in isentropic, rapidly rotating relativistic stars, via 3-D general-relativistic hydrodynamical evolutions, is presented. On dynamical timescales, we find no evidence for strong coupling of r-modes to other modes at amplitudes of order one or larger. Therefore, unless nonlinear saturation sets in on longer timescales, the maximum r-mode amplitude is of order one. An absolute upper limit on the amplitude is set by causality. Our simulations also show that r-modes and inertial modes in isentropic stars are discrete modes, with no evidence for the existence of a continuous part in the spectrum.
Cite
@article{arxiv.astro-ph/0011083,
title = {Nonlinear evolution of r-modes in rotating relativistic stars},
author = {Jose A. Font and Nikolaos Stergioulas},
journal= {arXiv preprint arXiv:astro-ph/0011083},
year = {2007}
}
Comments
4 pages, 1 figure, to appear in the proceedings of the Spanish Astronomical Society Meeting 2000