Multiple far-supercritical solutions for an α{LAMBDA}-dynamo.

Details Multiple far-supercritical solutions for an α{LAMBDA}-dynamo. Multiple far-supercritical solutions for an α{LAMBDA}-dynamo.

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...296..700m&link_type=abstract

Astronomy and Astrophysics, v.296, p.700

Astronomy and Astrophysics

Astrophysics

8

Stars: Magnetism, Magnetic Fields, Mhd, Dynamos

Scientific paper

We compute numerical solutions for axisymmetric, dynamically consistent mean-field dynamos in a spherical shell of conducting incompressible fluid. In the process of investigating the stability properties of solutions in the far-supercritical regime we found an unusual behaviour, with the magnetic energy decreasing discontinuously as the dynamo number is increased. A new stable solution with a more complicated field geometry emerges. In addition, a stable mixed parity state occurs at the discontinuity of the magnetic energy, between the two branches of stable pure parity solutions. For a given dynamo number there may be as many as four metastable solutions.

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