Anomalous resistivity and the evolution of magnetic field topology

Details Anomalous resistivity and the evolution of magnetic field topology Anomalous resistivity and the evolution of magnetic field topology

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...414..389p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 414, no. 1, p. 389-398.

Mathematics

Logic

12

Electrical Resistivity, Force-Free Magnetic Fields, Galactic Halos, Magnetohydrodynamics, Solar Flares, Topology, Current Density, Electric Current, Magnetic Storms

Scientific paper

This paper explores the topological restructuring of a force-free magnetic field caused by the hypothetical sudden onset of a localized region of strong anomalous resistivity. It is shown that the topological complexity increases, with the primitive planar force-free field with straight field lines developing field lines that wrap half a turn around each other, evidently providing a surface of tangential discontinuity in the wraparound region. It is suggested that the topological restructuring contributes to the complexity of the geomagnetic substorm, the aurora, and perhaps some of the flare activity on the sun, or other star, and the Galactic halo.

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