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Waves and Instabilities in Accretion Disks: MHD Spectroscopic Analysis

By F. Casse and J. P. Goedbloed

Abstract

A complete analytical and numerical treatment of all magnetohydrodynamic waves and instabilities for radially stratified, magnetized accretion disks is presented. The instabilities are a possible source of anomalous transport. While recovering results on known hydrodynamic and both weak- and strong-field magnetohydrodynamic perturbations, the full magnetohydrodynamic spectra for a realistic accretion disk model demonstrates a much richer variety of instabilities accessible to the plasma than previously realized. We show that both weakly and strongly magnetized accretion disks are prone to strong non-axisymmetric instabilities. The ability to characterize all waves arising in accretion disks holds great promise for magnetohydrodynamic spectroscopic analysis. Subject headings: Accretion, accretion disks — MHD — instabilities — waves 1. Hydromagnetic stability for stationary equilibria Magnetohydrodynamic (MHD) spectroscopy (Goedbloed et al. 1994) entails the ability to calculate all MHD perturbations accessible to a particular magnetized plasma configuratio

Year: 2002
OAI identifier: oai:CiteSeerX.psu:10.1.1.317.2872
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