May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976rspta.281..497p&link_type=abstract
(Royal Society, Discussion on the Physics of the Solar Atmosphere, London, England, Jan. 14, 15, 1975.) Royal Society (London),
Physics
Current Sheets, Magnetic Field Configurations, Solar Atmosphere, Thermal Instability, Astronomical Models, Magnetic Dipoles, Magnetic Flux, Potential Fields, Solar Corona, Solar Flux, Solar Prominences, Thermal Conductivity
Scientific paper
Current sheets are believed to be of prime importance in the solar atmosphere. At low heights, they may form at supergranulation boundaries; in the corona, they have been suggested as a prominence formation site. In addition, they may occur when a rapidly emerging flux presses up against pre-existing magnetic fields: if rapid magnetic-field annihilation and reconnection is then triggered, a surge or a flare may be produced. Comments are given about three aspects of general current-sheet theory. The position and shape of the current sheet which forms between two-dimensional dipole sources is calculated. The thermal instability which occurs when the length of the sheet exceeds a critical value is described. Finally, a simple model of magnetic-field annihilation is presented.
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