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Fig. 2


Snapshots of the temperature (upper panels) and of the vertical magnetic field component (bottom panels) at τ5 = 1 in the simulations at two distinct moments in time. The snapshots on the left are taken ten seconds after the start of the action of the battery; the color scale for the magnetic field strength saturates at ± 4 × 10-6 G. Yellow and orange contours superposed on the temperature map mark the locations with ± 1 × 10-6 G vertical field strength. The snapshots on the right are taken after the dynamo has reached the stationary phase. Here, the colors saturate at ± 400 G. The contours superposed on the temperature map mark locations with ± 1 × 102 G field strength.

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