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03 September 2014
 
  » arxiv » 1009.5236

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Pulsating magneto-dipole radiation of quaking neutron star at the expense of energy of Alfven seismic vibrations
S.I. Bastrukov ; I.V. Molodtsova ; J.W. Yu ; R.X. Xu ;
Date 27 Sep 2010
AbstractThe impact of magnetic field decay on radiative activity of quaking neutron star undergoing Lorentz-force-driven torsional seismic vibrations about axis of its dipole magnetic moment is studied. We found that monotonic depletion of internal magnetic field pressure is accompanied by the loss of vibration energy of the star that causes its vibration period to lengthen at a rate proportional to the rate of magnetic field decay. Particular attention is given to the magnetic-field-decay induced conversion of the energy of differentially rotational Alfven vibrations into the energy of oscillating magneto-dipole radiation. A set of representative examples of magnetic field decay illustrating the vibration energy powered emission with elongating periods produced by quaking neutron star are considered and discussed in the context of theory of magnetars.
Source arXiv, 1009.5236
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