Physics
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986soph..105...73n&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 105, May 1986, p. 73-85.
Physics
23
Electron Energy, Microwave Emission, Solar Flares, Solar X-Rays, Field Strength, Solar Electrons, Solar Magnetic Field
Scientific paper
Based on the rate of increse of the microwave flux relative to the hard X-ray flux at various energies from the onset to the peak of a flare, the mean energy of microwave-emitting electrons is estimated for 22 flares observed simultaneously in hard X-rays and microwaves. The energy of electrons varying in proportion to the 17 GHz emission is found to concentrate below 100 keV, and the mean energy or eletrons emitting 70 keV x-rays is less than about 130 keV for thin-target and less than about 180 keV for thick-target emission models, suggesting that the 17 GHz emission derives from electrons with energy of less than a few hundred keV. The magnetic field strength in the microwave source is found to be 500-1000 G for the thick-target and 1000-2000 G for the thin-target case, and 16 of the 22 events examined can be successfully explained by the thick-target model. Of the six events which cannot be explained by the thick-target model, two events give L of less than about 300 km.
Kosugi Taichi
Nitta Nariaki
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