An Overview of MHD Dynamo Theory

Details An Overview of MHD Dynamo Theory An Overview of MHD Dynamo Theory

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999bha..proge...6b&link_type=abstract

Presented at the KITP Program: Black Hole Astrophysics, Apr 7, 1999, Kavli Institute for Theoretical Physics, University of Cali

Astronomy and Astrophysics

Astrophysics

Scientific paper

I will discuss how magnetic fields grow in rotatingturbulent systems, distinguishing between the large scale mean field andsmall scale turbulent fields. I will explain why this has been an extremelycontroversial subject, and what criticisms people have made of mean fielddynamo theory both analytical and numerical over the years. I will addresswhy existing criticisms can be challenged and whythe mean field dynamo theory will likely survive. Evidence for this inaccretion disc simulations will be discussed. I will also discussseveral ways in which the mean field dynamo might operatein AGN to produce poloidal fields for jet formation.

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