[1005.5228] Gravitational wave asteroseismology with fast rotating neutron stars

Authors: Erich Gaertig, Kostas D. Kokkotas

Date: 28 May 2010

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.

abs pdf

Jun 01, 2010

1005.5228 (/preprints)
2010-06-01, 12:27 [edit]


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