Physics
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...47..277m&link_type=abstract
(NASA, IAU, IUGG, and International Council of Scientific Unions, Workshop on Flare Build-up Study, Falmouth, Mass., Sept. 8-11,
Physics
5
Magnetic Flux, Millimeter Waves, Solar Flares, Solar Magnetic Field, Solar Radio Emission, H Alpha Line, Magnetohydrodynamic Stability, Microwave Emission, Photosphere, Solar Activity
Scientific paper
Observations of radio emission at 3.3 mm wavelength associated with magnetic fields in active regions are reported. Results of more than 200 regions during the years 1967-1968 show a strong correlation between peak enhanced millimeter emission, total flux of the longitudinal component of photospheric magnetic fields and the number of flares produced during transit of active regions. For magnetic flux greater than (10 to the 21st power) maxwells flares will occur and for flux of (10 to the 23rd power) maxwells the sum of the H-alpha flare importance numbers is about 40. The peak millimeter enhancement increases with magnetic flux for regions which subsequently flared. Estimates of the magnetic energy available and the correlation with flare production indicate that the photospheric fields and probably chromospheric currents are responsible for the observed pre-flare heating and provide the energy of flares.
Mayfield Earle B.
White P. III K.
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