Magnetic Field Structures of Hard X-Ray Flares Observed by HINOTORI Spacecraft
Abstract
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, 2-4 x 104 km above the photosphere. The potential field modeling is found to give a reasonable fitting in this type of flares, 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.
- Publication:
-
Solar Physics
- Pub Date:
- February 1985
- DOI:
- 10.1007/BF00152408
- Bibcode:
- 1985SoPh...95..311S
- Keywords:
-
- Solar Flares;
- Solar Magnetic Field;
- Solar X-Rays;
- Japanese Spacecraft;
- Lines Of Force;
- Magnetic Field Configurations;
- Solar Corona;
- X Ray Imagery;
- Solar Physics;
- Flare;
- Potential Field;
- Field Modeling;
- Magnetic Loop;
- Magnetic Field Structure