Asymmetric eigenmodes in a simple model plasmasphere with non-uniform Alfvén speed

Details Asymmetric eigenmodes in a simple model plasmasphere with non-uniform Alfvén speed Asymmetric eigenmodes in a simple model plasmasphere with non-uniform Alfvén speed

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21..692c&link_type=abstract

Planetary and Space Science, Volume 21, Issue 4, p. 692-696.

Physics

1

Scientific paper

A previous study of non-axisymmetric eigenmodes in a simple model plasmasphere is extended to a case in which the Alfvén speed varies across the magnetic field lines. An approximate ordinary differential equation is derived, and this contains a logarithmic singularity closely analagous to a result obtain by Tamao (1965). The singularity is found to lie close to the resonant lines of force for a hypothetical torsional oscillation. Some valid eigenfrequencies are stated for a region with appropriate further boundaries.

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