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| Titel |
Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source |
| VerfasserIn |
A. S. Leonovich, V. A. Mazur |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 16, no. 8 ; Nr. 16, no. 8, S.914-920 |
| Datensatznummer |
250013388
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| Publikation (Nr.) |
 copernicus.org/angeo-16-914-1998.pdf |
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| Zusammenfassung |
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.
Key words. Ionosphere-magnetosphere interactions ·
Wave propagation · MHD waves and instabilities |
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