EIGENFREQUENCIES OF NODELESS ELASTIC VIBRATIONS LOCKED IN THE CRUST OF QUAKING NEUTRON STAR

Author:

BASTRUKOV S. I.1,CHANG H.-K.1,CHEN G.-T.1,MOLODTSOVA I. V.2

Affiliation:

1. Department of Physics and Institute of Astronomy, National Tsing Hua University, Hsinchu, 30013, Taiwan

2. Joint Institute for Nuclear Research, 141980 Dubna, Russia

Abstract

The Newtonian solid-mechanical theory of non-compressional spheroidal and torsional nodeless elastic vibrations in the homogenous crust model of a quaking neutron star is developed and applied to the modal classification of the quasi-periodic oscillations (QPOs) of X-ray luminosity in the aftermath of giant flares in SGR 1806-20 and SGR 1900+14. Particular attention is given to the low-frequency QPOs in the data for SGR 1806-20 whose physical origin has been called into question. Our calculations suggest that unspecified QPOs are due to nodeless dipole torsional and dipole spheroidal elastic shear vibrations.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Astronomy and Astrophysics,Nuclear and High Energy Physics

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