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Finite Amplitude Effects of Torsional Alfvén Waves in a Flux Tube

Published online by Cambridge University Press:  04 August 2017

⊘. Andreassen  and
P. Maltby
⊘. Andreassen
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo
P. Maltby
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo

Abstract

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Consider a cylindrical, homogeneous magnetic flux tube embedded in a field-free compressible plasma. We employ the method of successive approximations to solve the magnetohydrodynamic equations analytically for an axisymmetrical (m=0) torsional Alfvén mode. The m=0 mode inside the tube may excite surface-, stationary- or progressive waves in the field-free plasma. We conclude that, in contrast to the linear theory, the flux tube may lose energy by wave radiation to the surroundings.

Type
IV. The Role of Magnetic Fields in the Structure and Energy Balance of Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 102: Solar and Stellar Magnetic Fields: Origins and Coronal Effects , 1983 , pp. 401 - 406
Copyright
Copyright © Reidel 1983 

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