Gravitational wave asteroseismology with fast rotating neutron stars
Abstract
We investigate damping and growth times of the f-mode for rapidly rotating stars and a variety of different polytropic equations of state in the Cowling approximation. We discuss the differences in the eigenfunctions of co- and counterrotating modes and compute the damping times of the f-mode for several EoS and all rotation rates up to the Kepler-limit. This is the first study of the damping/growth time of this type of oscillations for fast rotating neutron stars in a general relativistic framework. We use these frequencies and damping/growth times to create robust empirical formulae which can be used for gravitational wave asteroseismology. The estimation of the damping/growth time is based on the quadrupole formula and our results agree very well with Newtonian ones in the appropriate limit.
Keywords
Cite
@article{arxiv.1005.5228,
title = {Gravitational wave asteroseismology with fast rotating neutron stars},
author = {Erich Gaertig and Kostas D. Kokkotas},
journal= {arXiv preprint arXiv:1005.5228},
year = {2011}
}
Comments
15 pages, 8 figures, version accepted for publication in PhysRevD