This paper presents studies of the vertical structure of hard X-ray flares for two contrasting examples. The 1981 May 13 flare contained a coronal hard X-ray source which was located above 50000 km above the photosphere. On the other hand, the 1981 July 20 flare had a chromospheric double source str
Temperature structure of spatially resolved hard X-ray flares
โ Scribed by G. M. Simnett
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 575 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0038-0938
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โฆ Synopsis
High resolution X-ray images are used to study the temperature structure and evolution of two spatially resolved, but compact, solar flares. Both flares developed within a magnetic loop whose footpoints were separated by typically 15000 km, and involved primary energy release at one footpoint. This was followed by transfer of chromospheric material into and around the loop. The flares involved total energies differing by over an order of magnitude, and they follow different evolutionary paths because of this.
๐ SIMILAR VOLUMES
Using a simplified form of the bremsstrahlung cross-section, we obtain an analytic expression for the intensity of electron-beam-produced hard X-ray emission with depth in solar flares. The results show that 'footpoint' emission is more likely than previously thought, and we discuss these results in