Evolution of Magnetic Field Curvature in the Kulsrud‐Anderson Dynamo Theory | Zendy

Leonid Malyshkin | Zendy

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Evolution of Magnetic Field Curvature in the Kulsrud‐Anderson Dynamo Theory

Author(s) -

Leonid Malyshkin

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/322351

Subject(s) - curvature , physics , magnetic field , isotropy , dynamo , dynamo theory , vector field , turbulence , magnetohydrodynamics , classical mechanics , exponential growth , geometry , mechanics , mathematics , quantum mechanics

We find that in the kinematic limit the ensemble averaged square of thecurvature of magnetic field lines is exponentially amplified in time by theturbulent motions in a highly conductive plasma. At the same time, the ensembleaveraged curvature vector exponentially decays to zero. Thus, independently ofthe initial conditions, the fluctuation field becomes very curved, and thecurvature vector becomes highly isotropic. Keywords: ISM: magnetic fields, MHD, turbulence, methods: analyticalComment: 4 pages (ApJ twocolumn style), a part of the conclusion has been change

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