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Title: Gravitational wave asteroseismology with fast rotating neutron stars

Abstract

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 these types 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.

Authors:
 [1];  [1];  [2]
  1. Theoretical Astrophysics, Eberhard-Karls University of Tuebingen, Tuebingen 72076 (Germany)
  2. (Greece)
Publication Date:
OSTI Identifier:
21537551
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 83; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.83.064031; (c) 2011 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; DAMPING; DEGREES OF FREEDOM; DISTURBANCES; EQUATIONS OF STATE; GRAVITATIONAL WAVES; NEUTRON STARS; OSCILLATIONS; PERTURBATION THEORY; RELATIVISTIC RANGE; SIMULATION; SPACE-TIME; CALCULATION METHODS; ENERGY RANGE; EQUATIONS; STARS

Citation Formats

Gaertig, Erich, Kokkotas, Kostas D., and Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124. Gravitational wave asteroseismology with fast rotating neutron stars. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.83.064031.
Gaertig, Erich, Kokkotas, Kostas D., & Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124. Gravitational wave asteroseismology with fast rotating neutron stars. United States. doi:10.1103/PHYSREVD.83.064031.
Gaertig, Erich, Kokkotas, Kostas D., and Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124. 2011. "Gravitational wave asteroseismology with fast rotating neutron stars". United States. doi:10.1103/PHYSREVD.83.064031.
@article{osti_21537551,
title = {Gravitational wave asteroseismology with fast rotating neutron stars},
author = {Gaertig, Erich and Kokkotas, Kostas D. and Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124},
abstractNote = {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 these types 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.},
doi = {10.1103/PHYSREVD.83.064031},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 83,
place = {United States},
year = 2011,
month = 3
}
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