Theoretical models of magnetic field line merging. I

Details Theoretical models of magnetic field line merging. I Theoretical models of magnetic field line merging. I

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975rvgsp..13..303v&link_type=abstract

Reviews of Geophysics and Space Physics, vol. 13, Feb. 1975, p. 303-336. Research supported by the Alfred P. Sloan Foundation;

Physics

Plasma Physics

542

Astronomical Models, Cosmic Plasma, Lines Of Force, Magnetic Field Configurations, Magnetohydrodynamic Stability, Earth Magnetosphere, Geomagnetic Tail, Interplanetary Magnetic Fields, Plasma Physics, Solar Physics

Scientific paper

A review is presented of the models of magnetic field line merging defined as the process whereby plasma flows across a surface which separates regions including topologically different magnetic field lines. The models examined are characterized by uniform and antiparallel external magnetic fields. An attempt is made to simplify the presentation of the models, to clarify some doubtful mathematical points, or to extend the results to a different range of physical parameters. The models are described from a hydromagnetic point of view, with the configuration in any given case being determined by the boundary conditions. It is shown that the models developed by Sweet (1958), Parker (1957, 1963), Petschek (1964), Sonnerup (1970), and by Yeh and Axford (1970) are basically consistent, describing different aspects of the same problem; however, there is not a single model that would account for all the cases considered. The singular models and the compressible similarity models are physically not feasible.

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