Turbulent dynamos and magnetic helicity

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66 Scopus citations


It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999

Original languageEnglish (US)
Pages (from-to)3198-3201
Number of pages4
JournalPhysical review letters
Issue number16
StatePublished - Oct 18 1999

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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