Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.251..569r&link_type=abstract
In ESA Proceedings of the Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics p 569-574 (SEE N87-
Astronomy and Astrophysics
Astrophysics
26
Axes Of Rotation, Magnetic Field Configurations, Planetary Magnetic Fields, Stellar Magnetic Fields, Axisymmetric Flow, Dynamo Theory, Magnetic Stars
Scientific paper
The behaviour of magnetic fields penetrating an electrically conducting fluid body with differential rotation depends crucially on their symmetry about the axis of rotation. In the non-axisymmetric case differential rotation enhances dissipation. It symmetrizes the fields during their evolution and is able to screen off their non-axisymmetric constituents. The αω-mechanism, unlike the α2-mechanism, can work with axisymmetric fields only. Those facts imply that cosmical bodies showing strongly non-axisymmetric fields should not have strong differential rotation. Consequences concerning planets, Sun, and magnetic stars are indicated.
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