Alfven seismic vibrations of crustal solid-state plasma in quaking paramagnetic neutron star
- State Key Laboratory of Nuclear Physics, Peking University, 100871 Beijing (China)
- Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
- Hong Kong University (Hong Kong)
- National Tsing Hua University, 30013 Hsinchu, Taiwan (China)
Magneto-solid-mechanical model of two-component, core-crust, paramagnetic neutron star responding to quake-induced perturbation by differentially rotational, torsional, oscillations of crustal electron-nuclear solid-state plasma about axis of magnetic field frozen in the immobile paramagnetic core is developed. Particular attention is given to the node-free torsional crust-against-core vibrations under combined action of Lorentz magnetic and Hooke's elastic forces; the damping is attributed to Newtonian force of shear viscose stresses in crustal solid-state plasma. The spectral formulas for the frequency and lifetime of this toroidal mode are derived in analytic form and discussed in the context of quasiperiodic oscillations of the x-ray outburst flux from quaking magnetars. The application of obtained theoretical spectra to modal analysis of available data on frequencies of oscillating outburst emission suggests that detected variability is the manifestation of crustal Alfven's seismic vibrations restored by Lorentz force of magnetic field stresses.
- OSTI ID:
- 21531951
- Journal Information:
- Physics of Plasmas, Vol. 17, Issue 11; Other Information: DOI: 10.1063/1.3518758; (c) 2010 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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