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Low mass stars : below the fully convective limit


The coronal field of v374Peg   The unexpected corona of v374 Peg

Current dynamo theories predict that low-mass, fully convective stars should have either small-scale fields produced by a turbulent dynamo, or a large-scale, non-axisymmetric field. The recent Zeeman-Doppler magnetic map of v374Peg (Donati et al, 2006, Science, 311,633) shows that in fact it has a strong, large scale field that is predominantly axisymmetric.


  Picture credit: Donati & Jardine