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GR: Fachverband Gravitation und Relativitätstheorie

GR 12: Relativistische Astrophysik

GR 12.1: Vortrag

Donnerstag, 31. März 2011, 17:45–18:05, 20.40: 101

Asteroseismology with fast rotating neutron stars — •Gaertig Erich and Kokkotas Kostas — Theoretische Astrophysik, Eberhard Karls Universität Tübingen

We investigate damping and growth times of the quadrupolar f-mode for rapidly rotating stars and a variety of different polytropic equations of state in the Cowling approximation.

This is the first study of the damping/growth time of this type of oscillations for fast rotating neutron stars in a relativistic treatment where the spacetime degrees of freedom of the perturbations are neglected.

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.