Bonn 2010 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 12: Astrophysik
GR 12.3: Talk
Wednesday, March 17, 2010, 16:00–16:20, JUR K
On the frequency band of the f-mode CFS instability — •Burkhard Zink1, Oleg Korobkin2, Erik Schnetter2, and Nikolaos Stergioulas3 — 1Theoretische Astrophysik, Eberhard-Karls-Universität Tübingen — 2Center for Computation and Technology, Louisiana State University, Baton Rouge, LA, USA — 3Department of Physics, Section of Astrophysics, Astronomy and Mechanics Aristotle University of Thessaloniki, Thessaloniki, Greece
Rapidly rotating neutron stars can be unstable to the CFS mechanism if they have a neutral point in the spectrum of nonaxisymmetric f-modes. We investigate the frequencies of these modes in two sequences of uniformly rotating polytropes using nonlinear simulations in full general relativity, determine the approximate locations of the neutral points, and derive limits on the observable frequency band available to the instability in these sequences.