Dynamos in Astrophysics: Quasilinear Estimates of Magnetic Helicity Currents
Abstract
The generation of large scale magnetic fields in highly conducting fluids, like astrophysical plasmas, depends on local turbulent eddies driving a global magnetic helicity current. The necessary degree of symmetry breaking is guaranteed in differentiallly rotating systems, but the necessary sign and amplitude of the effect is not. Here we give quasilinear estimates of the anomalous magnetic helicity current generated by the magnetorotational instability, magnetic Kelvin-Helmholtz instabilties, and convective instabilities.
- Publication:
-
APS April Meeting Abstracts
- Pub Date:
- April 2003
- Bibcode:
- 2003APS..APR.J1030V