Gravitational wave asteroseismology with fast rotating neutron stars

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.064031· OSTI ID:21537551

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

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1. Theoretical Astrophysics, Eberhard-Karls University of Tuebingen, Tuebingen 72076 (Germany)

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.

• OSTI ID: 21537551
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevD.83.064031; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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