Global Magneto-Rotational Instability (MRI) in Hall MHD

Details Global Magneto-Rotational Instability (MRI) in Hall MHD Global Magneto-Rotational Instability (MRI) in Hall MHD

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..apr.d1030p&link_type=abstract

American Physical Society, APS April Meeting, April 22-26, 2006, abstract #D1.030

Physics

Scientific paper

We derive the radial eigenmode equation for the linear (thin accretion disk) MRI within the framework of Hall Magnetohydrodynamics (HMHD). Eigenmodes are computed with a finite-differencing method, and the stability of these are compared to global MHD modes as well as the local approximation. In both MHD and HMHD the local analysis can give misleading conditions for instability as well as for the scaling of the frequency. In general the Hall current is stabilizing, however, parameter regimes exist where the Hall current can have a destabilizing effect.

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