Coupling between Radial and Torsional Oscillations in a Magnetized Plasma and Possible Stellar Applications | Zendy

T. V. Zaqarashvili | Zendy; G. Belvedère | Zendy

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Coupling between Radial and Torsional Oscillations in a Magnetized Plasma and Possible Stellar Applications

Author(s) -

T. V. Zaqarashvili,

G. Belvedère

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/517864

Subject(s) - physics , magnetic field , polarization (electrochemistry) , coupling (piping) , plasma , quantum electrodynamics , stars , classical mechanics , mechanics , astrophysics , computational physics , quantum mechanics , mechanical engineering , chemistry , engineering

The weakly non-linear interaction of slow magnetoacoustic and torsionalAlfven waves propagating along an unperturbed poloidal magnetic field in astellar interior is studied in the high plasma beta limit. It is shown thatslow magnetoacoustic waves parametrically drive torsional modes with the halffrequency and wave number. Therefore global slow magnetoacoustic waves whichhave a radial velocity polarization, may amplify the torsional oscillations.Possible applications of this mechanism to the Sun and binary stars are brieflydiscussed.Comment: 10 pages, 2 figures, accepted in Ap

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