Waves and Instabilities in Accretion Disks: MHD Spectroscopic Analysis
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.
Cite
@article{arxiv.astro-ph/0203237,
title = {Waves and Instabilities in Accretion Disks: MHD Spectroscopic Analysis},
author = {R. Keppens and F. Casse and J. P. Goedbloed},
journal= {arXiv preprint arXiv:astro-ph/0203237},
year = {2009}
}
Comments
FOM-Institute for plasma physics "Rijnhuizen", Nieuwegein, the Netherlands 12 pages, 3 figures, Accepted for publication in ApJL