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Waves and Instabilities in Accretion Disks: MHD Spectroscopic Analysis

R. Keppens·F. Casse·J. P. Goedbloed
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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 hydrodynamicand 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.

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R. Keppens, F. Casse, J. P. Goedbloed. 2002-03-14. Waves and Instabilities in Accretion Disks: MHD Spectroscopic Analysis. https://doi.org/10.1086/340666

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