Wave absorption at the Alfven resonance in a medium of finite conductivity

Details Wave absorption at the Alfven resonance in a medium of finite conductivity Wave absorption at the Alfven resonance in a medium of finite conductivity

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.174..173z&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 174, no. 2, Dec. 1990, p. 173-179.

Astronomy and Astrophysics

Astrophysics

7

Conductivity, Magnetoacoustic Waves, Magnetohydrodynamic Waves, Asymptotic Methods, Magnetic Field Configurations, Wave Propagation

Scientific paper

A linear transformation of a fast magnetoacoustic wave in the vicinity of the Alfven resonance in a finite conductivity medium permeated by a homogeneous magnetic field is examined, assuming that the inclination angle of the magnetic field is close to the critical. A formula is developed showing that, in the vicinity of the Alfven resonance, a partial transformation of a fast magnetoacoustic wave into a damped Alfven wave is taking place. It is shown that the efficiency of transformation decreases with increasing the distance between the point of reflection for a fast magnetoacoustic wave and the point of the Alfven resonance.

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