Explosive events and magnetic reconnection in the solar atmosphere

Details Explosive events and magnetic reconnection in the solar atmosphere Explosive events and magnetic reconnection in the solar atmosphere

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.9399d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, June 1, 1991, p. 9399-9407.

Physics

119

Magnetic Field Reconnection, Solar Activity, Solar Atmosphere, Solar Magnetic Field, Doppler Effect, Line Spectra, Magnetic Flux, Magnetohydrodynamic Waves, Solar Spectra

Scientific paper

Solar explosive events are identified here with magnetic reconnection that occurs during the cancellation of photospheric magnetic flux. The combined observational characteristics of photospheric flux cancellation and transition zone explosive events provide powerful diagnostic information concerning the nature of magnetic reconnection. Reconnection in the quiet solar atmosphere apparently proceeds in bursts at sites much smaller than the boundary between opposite polarity flux elements that are observed to cancel in magnetograph sequences. Equating the velocity of the expelled transition zone plasma with the Alfven speed yields magnetic field strengths of 20 G at the site of reconnection. The speed at which the reconnection proceeds is commensurate with the rapid rates predicted by Petschek (1964).

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