Effects of steady flow on magnetoacoustic-gravity surface waves

Details Effects of steady flow on magnetoacoustic-gravity surface waves Effects of steady flow on magnetoacoustic-gravity surface waves

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001padeu..11...83v&link_type=abstract

Publications of the Astronomy Department of the Eötvös University No. 11, Proceedings of the National Postgraduate Reunion in As

Astronomy and Astrophysics

Astrophysics

1

Mhd (Surface) Waves, Steady Flow, Convective Zone, Chromosphere

Scientific paper

The linearized theory for the parallel propagation of magnetoacoustic-gravity (MAG) surface waves is developed for an isothermal interface of a horizontally magnetised plasma above a field-free medium with a constant steady flow parallel to the field lines. The dispersion relation is derived and studied in detail for two distributions of magnetic field strength. The effect of flow is found to be twofold: %We found that the effect of flow is twofold: the frequencies of the modes and the permitted regions of propagation are both shifted causing some modes to disappear, and others to appear. The backward propagating slow mode changes its direction of propagation and couples to its forward propagating counterpart.

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