Gravitational wave spectrum of anisotropic neutron stars in Cowling approximation

Details Gravitational wave spectrum of anisotropic neutron stars in Cowling approximation Gravitational wave spectrum of anisotropic neutron stars in Cowling approximation

2012-03-18

arxiv.org/abs/1203.3963v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, 8 figures

Scientific paper

One of the most common assumption in the studies of neutron star models and their oscillations is that the pressure is isotopic but there are arguments that this may not be correct. Thus in the present paper we make a first step towards studying the nonradial oscillations of neutron stars with anisotropic pressure. We adopt the so-called Cowling approximation where the spacetime metric is kept fixed and the oscillation spectrum for the first few fluid modes is obtained. The effect of the anisotropy on the frequencies is apparent, although with the present results it might be hard to distinguish it from the changes in the frequencies caused by different equations of state.

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