Generation of nonaxisymmetric magnetic structures in galaxies, the Sun, and planets

Details Generation of nonaxisymmetric magnetic structures in galaxies, the Sun, and planets Generation of nonaxisymmetric magnetic structures in galaxies, the Sun, and planets

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995arep...39..227s&link_type=abstract

Astronomy Reports, Volume 39, Issue 2, March 1995, pp.227-231

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We analyze the problem of predominant generation of nonaxisymmetric magnetic fields in the observed spiral galaxies, the Sun, and planets similar to Uranus and Neptune. It is assumed that, in these objects, the hydromagnetic dynamo may operate in relatively thin conducting convective sheets. It is shown that nonaxisymmetric magnetic modes can be generated more readily than axisymmetric modes in such sheets. For this to occur, it is necessary for the gradient of the angular velocity of rotation to be comparatively small and to have a nonzero component orthogonal to the sheet.

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