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Astron. Astrophys. 346, 922-928 (1999)

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Magnetic field generation in weak-line T Tauri stars: an [FORMULA]-dynamo

M. Küker and G. Rüdiger

Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany

Received 19 February 1999 / Accepted 21 April 1999

Abstract

We present a model for the generation of magnetic fields in fully convective pre-main sequence stars. The dynamo process in this type of star is of [FORMULA]-type and hence quite different from the solar dynamo. Based on a mean field model of the turbulent electromotive force, the nonlinear induction equation is solved in three dimensions to allow for non-axisymmetric solutions. The resulting magnetic field is purely non-axisymmetric and steady.

Key words: Magnetohydrodynamics (MHD) – stars: magnetic fields – stars: pre-main sequence

Send offprint requests to: M. Küker

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© European Southern Observatory (ESO) 1999

Online publication: June 17, 1999
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