Accretion Disk Dynamos and Coronal Heating

Details Accretion Disk Dynamos and Coronal Heating Accretion Disk Dynamos and Coronal Heating

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.1724v&link_type=abstract

American Astronomical Society, HEAD meeting #7, #17.24; Bulletin of the American Astronomical Society, Vol. 35, p.628

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Dynamo activity in astrophysical plasmas is mediated by the magnetic helicity current. This is particularly true for accretion disks, where the dynamo is always in the nonlinear limit. I will present quasilinear estimates of the magnetic helicity current driven by the magnetorotational instability and the consequent magnetic dynamo growth rate. For comparison I will discuss similar results for other kinds of turbulence in shearing flows. Finally, I will discuss the implications of this work for energy generation in disk coronae.

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