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

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

2001-03-13

arxiv.org/abs/astro-ph/0103191v2

Astrophysical Journal, 2001, v. 559, pp. 304-306

Astronomy and Astrophysics

Astrophysics

4 pages (ApJ twocolumn style), a part of the conclusion has been changed

Scientific paper

10.1086/322351

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. Keywords: ISM: magnetic fields, MHD, turbulence, methods: analytical

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