Mean Field Dynamos with Algebraic and Dynamic alpha-Quenchings
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Calculations for mean field dynamo models (in both full spheres and spherical shells), with both algebraic and dynamic $α$--quenchings, show qualitative as well as quantitative differences and similarities in the dynamical behaviour of these models. We summarise and enhance recent results with extra examples.
Overall, the effect of using a dynamic $α$ appears to be complicated and is affected by the region of parameter space examined.
6 pages, 2 postscript figures, also available at http://www.maths.qmw.ac.uk/~eoc
6 pages, 2 postscript figures, also available at http://www.maths.qmw.ac.uk/~eoc