Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-02-07
AIP Conf.Proc.861:638-645,2006
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
8 pages, 7 figures, to appear in the Proceedings of the Albert Einstein Century International Conference, Paris, France, July
Scientific paper
10.1063/1.2399636
We derive the relativistic equations for stellar perturbations, including in a consistent way shear viscosity in the stress-energy tensor, and we numerically integrate our equations in the case of large viscosity. We consider the slow rotation approximation, and we neglect the coupling between polar and axial perturbations. In our approach, the frequency and damping time of the emitted gravitational radiation are directly obtained. We find that, approaching the inviscid limit from the finite viscosity case, the continuous spectrum is regularized. Constant density stars, polytropic stars, and stars with realistic equations of state are considered. In the case of constant density stars and polytropic stars, our results for the viscous damping times agree, within a factor two, with the usual estimates obtained by using the eigenfunctions of the inviscid limit. For realistic neutron stars, our numerical results give viscous damping times with the same dependence on mass and radius as previously estimated, but systematically larger of about 60%.
Ferrari Valeria
Gualtieri Leonardo
Miralles Juan A.
Pons Jose A.
No associations
LandOfFree
Relativistic r-modes and shear viscosity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Relativistic r-modes and shear viscosity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relativistic r-modes and shear viscosity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-218516