Investigation of non-uniform heating during the decay phase of solar flares

✍ Scribed by B. Sylwester; J. Sylwester; R. D. Bentley; A. Fludra

• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 346 KB
• Volume: 126
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00158305

✦ Synopsis

We have analysed X-ray spectra of 13 solar flares as obtained by the Bent Crystal Spectrometer (BCS) on the Solar Maximum Mission. In particular, we have examined the observed ratio of Tve/Tca where TFe and /-ca are the temperatures obtained from the Fexxv and Caxlx spectra, respectively. In order to simplify the investigation we have analysed only flares which reach quasi-steady-state during the decay. It turned out that the observed ratios cannot be explained by a model consisting of a single, uniformly heated loop, with a constant or variable cross-sectional area. We propose that this problem may be solved by introducing some distribution of the heating function across the flaring loop. This model has been tested by detailed calculations.