Oscillations of rapidly rotating relativistic stars

Erich Gaertig and Kostas D. Kokkotas
Phys. Rev. D 78, 064063 – Published 25 September 2008

Abstract

Nonaxisymmetric oscillations of rapidly rotating relativistic stars are studied using the Cowling approximation. The oscillation spectra have been estimated by Fourier transforming the evolution equations describing the perturbations. This is the first study of its kind and provides information on the effect of fast rotation on the oscillation spectra while it offers the possibility of studying the complete problem by including space-time perturbations. Our study includes both axisymmetric and nonaxisymmetric perturbations and provides limits for the onset of the secular bar mode rotational instability. We also present approximate formulas for the dependence of the oscillation spectrum from rotation. The results suggest that it is possible to extract the relativistic star’s parameters from the observed gravitational wave spectrum.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
6 More
  • Received 15 July 2008

DOI:https://doi.org/10.1103/PhysRevD.78.064063

©2008 American Physical Society

Authors & Affiliations

Erich Gaertig1,2,* and Kostas D. Kokkotas1,3

  • 1Theoretical Astrophysics, University of Tübingen, Auf der Morgenstelle 10, Tübingen 72076, Germany
  • 2Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Hannover 30167, Germany
  • 3Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece

  • *gaertig@tat.physik.uni-tuebingen.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 78, Iss. 6 — 15 September 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×