✦ LIBER ✦

Resonant behaviour of MHD waves on magnetic flux tubes

✍ Scribed by Takashi Sakurai; Marcel Goossens; Joseph V. Hollweg

Publisher: Springer
Year: 1991
Tongue: English
Weight: 658 KB
Volume: 133
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00149889

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✦ Synopsis

The absorption of solar five-rain oscillations by sunspots is interpreted as the resonant absorption of sound waves by a magnetic cylinder. The absorption coefficient is calculated both analytically under certain simplifying assumptions, and numerically under more general conditions. The observed magnitude of the absorption coefficient, which is up to 0.5 or even more, can be explained for suitable ranges of parameters. Limitations in the present model are also discussed.

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