Convective dynamos in spherical wedge geometry

Details Convective dynamos in spherical wedge geometry Convective dynamos in spherical wedge geometry

2009-09-08

arxiv.org/abs/0909.1330v3

Astron. Nachr. 331, 73-81 (2010)

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

9 pages, 10 figures, Astron. Nachr. in press. Version with higher resolution figures is available at http://www.helsinki.fi/~k

Scientific paper

10.1002/asna.200911252

Self-consistent convective dynamo simulations in wedge-shaped spherical shells are presented. Differential rotation is generated by the interaction of convection with rotation. Equatorward acceleration and dynamo action are obtained only for sufficiently rapid rotation. The angular velocity tends to be constant along cylinders. Oscillatory large-scale fields are found to migrate in the poleward direction. Comparison with earlier simulations in full spherical shells and Cartesian domains is made.

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