Physics
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...95..311s&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 95, Feb. 1985, p. 311-321.
Physics
17
Solar Flares, Solar Magnetic Field, Solar X-Rays, Japanese Spacecraft, Lines Of Force, Magnetic Field Configurations, Solar Corona, X Ray Imagery
Scientific paper
The magnetic-field structure of five flares observed by Hinotori spacecraft is studied. The double-source structure of impulsive flares seems to indicate hard X-ray emission from the two footpoints of a flaring loop, but the potential-field computation does not reproduce a loop connecting the two sources. Therefore the magnetic field could be in a sheared configuration and the force-free field modeling would be the next step to examine. On the other hand gradual flares are characterized by hard X-ray sources located in the corona, 20,000-40,000 km above the photosphere. The potential-field modeling is found to give a reasonable fitting in this type of flare, and the hard X-ray sources are located at the top of the magnetic loop or arcade. This configuration is consistent with the thick-target trap model of the hard X-ray bursts.
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