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Secondary tearingmode in the nonlinear evolution of magnetorotational instability

✍ Scribed by T. Tatsuno; W. Dorland

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 438 KB
Volume: 329
Category: Article
ISSN: 0004-6337
DOI: 10.1002/asna.200811013

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✦ Synopsis

Abstract

Numerical investigation of the two‐dimensional magnetic reconnection is given in the context of the nonlinear evolution of the Magneto‐Rotational Instability (MRI). With a careful comparison to various theories using both one‐ and twodimensional analysis, it is found that a new stabilizing effect of the centrifugal force on tearing instability must be present in the specific geometry of the MRI.Magnetic reconnection might play a key role to the formation of the nonaxisymmetric structures observed in MRI experiments. The results may also be useful for the estimate of the accretion rate in various astrophysical objects. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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