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Secondary tearingmode in the nonlinear evolution of magnetorotational instability
Author(s) -
Tatsuno T.,
Dorland W.
Publication year - 2008
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200811013
Subject(s) - magnetorotational instability , physics , instability , magnetic reconnection , nonlinear system , context (archaeology) , tearing , accretion (finance) , magnetohydrodynamics , classical mechanics , mechanics , accretion disc , magnetic field , astrophysics , geology , paleontology , quantum mechanics , thermodynamics
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)