MHD simulations of magnetic reconnection in a skewed three-dimensional tail configuration

Details MHD simulations of magnetic reconnection in a skewed three-dimensional tail configuration MHD simulations of magnetic reconnection in a skewed three-dimensional tail configuration

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96...23b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Jan. 1, 1991, p. 23-34. Research supported by NASA.

Mathematics

Logic

35

Geomagnetic Tail, Magnetic Field Configurations, Magnetic Field Reconnection, Neutral Sheets, Atmospheric Models, Earth Magnetosphere, Interplanetary Magnetic Fields, Magnetohydrodynamic Stability

Scientific paper

The dynamic evolution of a nonsymmetric magnetotail configuration initiated by the sudden occurrence of (anomalous) resistivity are examined using a three-dimensional resistive MHD simulation developed by Birn (1990) that includes a net cross-tail field and thus breaks the mirror symmetry around the neutral sheet. Results show that the field evolution is similar to that of a symmetric configuration studied by Birn and Hones (1981), pointing to the formation and ejection of a plasmoid. On the other hand, the topological structure of the magnetic field, defined by the field line connections, was remarkably different from the symmetric case. The plasmoid in this case became 'open', connected initially with the earth but gradually becoming connected with the interplanetary field. The openness of the plasmoid and its magnetic connection with interplanetary field lines suggest the possibility of a heat flux out of the plasmoid on interconnected flux tubes.

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