A&A 440, L9-L12 (2005)
Stellar evolution with rotation and magnetic fields
IV. The solar rotation profileP. Eggenberger, A. Maeder and G. Meynet
Observatoire de Genève, 51 chemin de Maillettes, 1290 Sauverny, Switzerland
(Received 2 June 2005 / Accepted 16 July 2005)
We examine the generation of a magnetic field in a solar-like star and its effects on the internal distribution of the angular velocity. We suggest that the evolution of a rotating star with magnetic fields leads to an equilibrium value of the differential rotation. This equilibrium is determined by the magnetic coupling, which favours a constant rotation profile, and meridional circulation which tends to build differential rotation. The global equilibrium stage is close to solid body rotation between about 0.7 and 0.2 , in good agreement with helioseismic measurements.
Key words: stars: rotation -- stars: magnetic fields -- stars: evolution
© ESO 2005