Standing Alfvén waves with 1 in an axisymmetric magnetosphere excited by a non-stationary source

Details Standing Alfvén waves with 1 in an axisymmetric magnetosphere excited by a non-stationary source Standing Alfvén waves with 1 in an axisymmetric magnetosphere excited by a non-stationary source

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998angeo..16..914l&link_type=abstract

Annales Geophysicae, vol. 16, Issue 8, pp.914-920

Physics

5

Scientific paper

As a continuation of our earlier paper, we consider here the case of the excitation of standing Alfvén waves by a source of the type of sudden impulse. It is shown that, following excitation by such a source, a given magnetic shell will exhibit oscillations with a variable frequency which increases from the shell's poloidal to toroidal frequency. Simultaneously, the oscillations will also switch over from poloidally (radially) to toroidally (azimuthally) polarized. With a reasonably large attenuation, only the start of this process, the stage of poloidal oscillations, will be observed in the ionosphere.

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