Chaos in accretion disk dynamos?

Physics

Scientific paper

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Accretion Disks: Dynamo Theory, Accretion Disks: Chaotic Motions

Scientific paper

Accretion disks appear to be favourable places for dynamo action, because of their strong differential rotation. A simple estimate of the strength of an accretion disk dynamo indicates that it will be highly nonlinear. In spite of this, most studies hitherto have assumed a linear model for the dynamo. The authors investigate nonlinear, axisymmetric mean-field dynamos in accretion disks in order to study the route to chaotic solutions in certain parameter regimes. The authors find a sequence of bifurcations that lead eventually to chaos. Finally, the physical significance of these results is discussed.

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