Dependence of radio emission in large Hα flares 1967–1970 upon the orientation of the local solar magnetic field
✍ Scribed by Edmond C. Roelof; Helen W. Dodson; E. Ruth Hedeman
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 595 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0038-0938
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✦ Synopsis
During 1967During -1970
, the greatness of ~ 90 large flares (Ha importance > 2) was influenced by the orientation of the large-scale (~ 100000 km) magnetic field structure over the flare site. Although the average X-ray and optical emissions are only slightly larger for flares with their overlying fields directed southward, as opposed to northward, the meter-wave-length prompt flux maxima are, on average, an order of magnitude greater for the flares with southward oriented magnetic fields. There is a comparable, but possibly smaller difference in the 10 cm-2 fluxes. We therefore conclude that, during this period, the orientation of the overlying magnetic field affects the amount of electromagnetic flare energy radiated promptly in the corona (10 cm-2 and m-2), relative to that radiated in the chromosphere (X-ray and optical). We demonstrate that this statistical effect shows some variability in degree during the period, although the trend is consistent throughout.