Gravitational wave asteroseismology with fast rotating neutron stars

Details Gravitational wave asteroseismology with fast rotating neutron stars Gravitational wave asteroseismology with fast rotating neutron stars

2010-05-28

arxiv.org/abs/1005.5228v3

Phys.Rev.D83:064031,2011

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

15 pages, 8 figures, version accepted for publication in PhysRevD

Scientific paper

10.1103/PhysRevD.83.064031

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.

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