Oscillations of rapidly rotating relativistic stars

Journal Article · Mon Sep 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.064063· OSTI ID:21254144

Gaertig, Erich ^[1]; Kokkotas, Kostas D ^[1]

---

1. Theoretical Astrophysics, University of Tuebingen, Auf der Morgenstelle 10, Tuebingen 72076 (Germany)

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.

• OSTI ID: 21254144
• Journal Information: Physical Review. D, Particles Fields, Vol. 78, Issue 6; Other Information: DOI: 10.1103/PhysRevD.78.064063; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
APPROXIMATIONS
AXIAL SYMMETRY
DISTURBANCES
EQUATIONS
FOURIER TRANSFORMATION
GRAVITATIONAL WAVES
INSTABILITY
OSCILLATIONS
PERTURBATION THEORY
RELATIVISTIC RANGE
ROTATION
SPACE-TIME
SPECTRA
STARS