Perturbative Analysis of Universality and Individuality in Gravitational Waves from Neutron Stars

Details Perturbative Analysis of Universality and Individuality in Gravitational Waves from Neutron Stars Perturbative Analysis of Universality and Individuality in Gravitational Waves from Neutron Stars

2005-05-23

arxiv.org/abs/gr-qc/0505113v1

Astrophys.J.631:495-505,2005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

29 pages, 10 figures, submitted to Astrophysical Journal

Scientific paper

10.1086/432525

The universality observed in gravitational wave spectra of non-rotating neutron stars is analyzed here. We show that the universality in the axial oscillation mode can be reproduced with a simple stellar model, namely the centrifugal barrier approximation (CBA), which captures the essence of the Tolman VII model of compact stars. Through the establishment of scaled co-ordinate logarithmic perturbation theory (SCLPT), we are able to explain and quantitatively predict such universal behavior. In addition, quasi-normal modes of individual neutron stars characterized by different equations of state can be obtained from those of CBA with SCLPT.

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