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The Dynamo Effect in Stars

  • Axel Brandenburg
Part of the Astrophysics and Space Science Library book series (ASSL, volume 254)

Abstract

Stars with outer convection zones are all magnetically active. They pos-sess magnetic fields that have a strong large scale component, which can sometimes show cyclic reversals, like in the sun. Over the past thirty years mean-field dynamo theory has been used to explain structure and evolution of those large scale fields. The main ingredients of this theory are the alpha-effect and turbulent diffusion, but the physical nature of these effects has shifted from a purely hydrodynamical origin to more magnetically controlled scenarios, where thermal buoyancy, for example, is replaced by magnetic buoyancy and other magnetically driven instabilities.

Keywords

dynamos stellar cycles magnetohydrodynamics 

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Copyright information

© Springer Science+Business Media Dordrecht 2000

Authors and Affiliations

  • Axel Brandenburg
    • 1
  1. 1.NORDITA, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark; and Department of MathematicsUniversity of Newcastle upon TyneUK

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