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Dynamo–Action in Accretion Disks

Published online by Cambridge University Press:  19 July 2016

W. Deinzer
W. Deinzer*
Affiliation:
Universitäts–Sternwarte, Geismarlandstr. 11 D–3400 Göttingen, Federal Republic of Germany

Abstract

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Accretion disks are approximated by thin tori and the generation of magnetic fields by torus–dynamos is investigated. Solutions for the general α2ω–dynamo embedded into vacuum and into an ideally conducting medium are presented. Whereas the former solutions are qualitatively similar to those obtained for thin disks, there is a mode for the latter peculiar to torus–geometry. Excitation conditions for torus–dynamos are compared to those realized in accretion disks in cataclysmic variables, around T Tauri stars and in AGN's.

Keywords

Mean–Field ElectrodynamicsDynamo TheoryAccretion Disks
Type
5. Magnetic Field Generation in Accretion Disks
Information
Symposium - International Astronomical Union , Volume 157: The Cosmic Dynamo , 1993 , pp. 185 - 192
Copyright
Copyright © Kluwer 1993 

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