Solar and stellar dynamos -- latest developments

Details Solar and stellar dynamos -- latest developments Solar and stellar dynamos -- latest developments

2002-07-18

arxiv.org/abs/astro-ph/0207393v1

Astron.Nachr. 323 (2002) 411-416

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, Astron Nachr (accepted; proceedings of "1st Potsdam Thinkshop on Sunspots and Starspots", Potsdam, Germany

Scientific paper

10.1002/1521-3994(200208)323:3/4

Recent progress in the theory of solar and stellar dynamos is reviewed. Particular emphasis is placed on the mean-field theory which tries to describe the collective behavior of the magnetic field. In order to understand solar and stellar activity, a quantitatively reliable theory is necessary. Much of the new developments center around magnetic helicity conservation which is seen to be important in numerical simulations. Only a dynamical, explicitly time dependent theory of alpha-quenching is able to describe this behavior correctly.

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