Computing gravitational waves from slightly nonspherical stellar collapse to a black hole: Odd-parity perturbation
- 1 July 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 68 (2), 024002
- https://doi.org/10.1103/physrevd.68.024002
Abstract
Nonspherical stellar collapse to a black hole is one of the most promising gravitational wave sources for gravitational wave detectors. We numerically study gravitational waves from a slightly nonspherical stellar collapse to a black hole in linearized Einstein theory. We adopt a spherically collapsing star as the zeroth-order solution and gravitational waves are computed using perturbation theory on the spherical background. In this paper we focus on the perturbation of odd-parity modes. Using the polytropic equations of state with polytropic indices and 3, we qualitatively study gravitational waves emitted during the collapse of neutron stars and supermassive stars to black holes from a marginally stable equilibrium configuration. Since the matter perturbation profiles can be chosen arbitrarily, we provide a few types for them. For the gravitational waveforms are mainly characterized by a black hole quasinormal mode ringing, irrespective of perturbation profiles given initially. However, for the waveforms depend strongly on the initial perturbation profiles. In other words, the gravitational waveforms strongly depend on the stellar configuration and, in turn, on the ad hoc choice of the functional form of the perturbation in the case of supermassive stars.
Keywords
Other Versions
This publication has 58 references indexed in Scilit:
- Relativistic simulations of rotational core collapse II. Collapse dynamics and gravitational radiationAstronomy & Astrophysics, 2002
- Equilibrium and stability of supermassive stars in binary systemsPhysical Review D, 2001
- Stable Operation of a 300-m Laser Interferometer with Sufficient Sensitivity to Detect Gravitational-Wave Events within Our GalaxyPhysical Review Letters, 2001
- First search for gravitational waves from inspiraling compact binaries using TAMA300 dataPhysical Review D, 2001
- Evolution of Rotating Supermassive Stars to the Onset of CollapseThe Astrophysical Journal, 1999
- LIGO: The Laser Interferometer Gravitational-Wave ObservatoryScience, 1992
- The VIRGO Project: A wide band antenna for gravitational wave detectionNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1990
- An analytic representation for the quasi-normal modes of Kerr black holesProceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, 1985
- Gravitational-Wave Emission from Rotating Gravitational CollapsePhysical Review Letters, 1985
- Black Hole Models for Active Galactic NucleiAnnual Review of Astronomy and Astrophysics, 1984