Eigenfrequency of nodeless elastic vibrations locked in the crust of quaking neutron star

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.

arXiv comment10 pages, 3 figures: Mod.Phys.Lett. A23 (2008) 477

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• The 2004 Hyperflare from SGR 1806-20: Further Evidence for Global Torsional Vibrations
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Cited by in corpus (6)

• Elasticity of nuclear medium as a principal macrodynamical promoter of electric dipole pygmy resonance
• Torsional nodeless vibrations of quaking neutron star restored by combined forces of shear elastic and magnetic field stresses
• Frequency spectrum of toroidal Alfvén mode in a neutron star with Ferraro's form of nonhomogeneous poloidal magnetic field
• Alfven seismic vibrations of crustal solid-state plasma in quaking paramagnetic neutron star
• Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations
• Self-gravitating astrophysical mass with singular central density vibrating in fundamental mode