Wave beams in the magnetoelastic crust of pulsars

Details Wave beams in the magnetoelastic crust of pulsars Wave beams in the magnetoelastic crust of pulsars

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap.....50..451s&link_type=abstract

Astrophysics, Volume 50, Issue 4, pp.451-459

Astronomy and Astrophysics

Astrophysics

Stars, Pulsars, Magnetic Field

Scientific paper

The propagation of axially symmetric magnetoelastic waves near the equatorial plane of the crust of a neutron star embedded in a transverse magnetic field is examined. The crust is treated as a solid-state plasma and waves are excited in it in the form of a transverse magnetic field applied to the inner boundary of the star’s crust. The time dependent equation is solved in a linear approximation assuming that the perturbing magnetic field is small compared to the unperturbed field. A simple, exact solution in the form of linear gaussian beams is obtained without additional conditions being imposed on the dissipation, dispersion, and narrowness of the beam, provided only that the velocity cn of these waves depends weakly on position. This last condition is satisfied for the plasma in the crust of a neutron star. As it propagates to the star’s surface, the radius of the beam remains constant. The electric currents generated by the wave beam on the star’s surface are also calculated.

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