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

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

2006-11-16

arxiv.org/abs/astro-ph/0611534v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

We consider the flow of an electrically conducting fluid between differentially rotating cylinders, in the presence of an externally imposed toroidal field B_0 (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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