Physics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..133..227s&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 133, June 1991, p. 227-245.
Physics
142
Magnetic Flux, Magnetohydrodynamic Waves, Plasma Resonance, Solar Magnetic Field, Solar Oscillations, Magnetic Field Configurations, Solar Spectra
Scientific paper
The present method of addressing the resonance problems that emerge in such MHD phenomena as the resonant absorption of waves at the Alfven resonance point avoids solving the fourth-order differential equation of dissipative MHD by recourse to connection formulae across the dissipation layer. In the second part of this investigation, the absorption of solar 5-min oscillations by sunspots is interpreted as the resonant absorption of sounds by a magnetic cylinder. The absorption coefficient is interpreted (1) analytically, under certain simplifying assumptions, and numerically, under more general conditions. The observed absorption coefficient magnitude is explained over suitable parameter ranges.
Goossens Marcel
Hollweg Joseph V.
Sakurai Takashi
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