4.7 Article

Evolution of magnetic field curvature in the Kulsrud-Anderson dynamo theory

Journal

ASTROPHYSICAL JOURNAL
Volume 559, Issue 1, Pages 304-306

Publisher

UNIV CHICAGO PRESS
DOI: 10.1086/322351

Keywords

ISM : magnetic fields; methods : analytical; MHD; turbulence

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We find that in the kinematic limit, the ensemble-averaged square of the curvature of magnetic field lines is exponentially amplified in time by the turbulent motions in a highly conductive plasma. At the same time, the ensemble-averaged curvature vector exponentially decays to zero. Thus, independently of the initial conditions,, the fluctuation field becomes very curved, and the curvature vector becomes highly isotropic.

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