A non-axisymmetric magnetorotational instability of a purely toroidal magnetic field

2006/11/16 by Hollerbach, R., Rudiger, G., Schultz, M. +1
#Astrophysics (astro-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.astro-ph/0611534

Abstract

We consider the flow of an electrically conducting fluid between differentially rotating cylinders, in the presence of an externally imposed toroidal field B₀ (r_i/r) e_phi. It is known that the classical, axisymmetric magnetorotational instability does not exist for such a purely toroidal imposed field. We show here that a non-axisymmetric magnetorotational instability does exist, having properties very similar to the axisymmetric magnetorotational instability in the presence of an axial field.

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