Further analysis of temperature and emission measure during the decay phase of solar flares derived from soft X-ray light curves

Astronomy and Astrophysics – Astronomy

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Light Curve, Plasma Diagnostics, Plasma Temperature, Solar Flares, X Ray Astronomy, Decay, Flux Quantization, Plasma Radiation, Solar Maximum Mission

Scientific paper

The light curves of soft X-ray lines, observed by the Flat Crystal Spectrometer on Solar Maximum Mission during eight solar flares are modeled to determine the plasma temperature and emission measure as functions of time using the method first presented by Bornmann (1985), but modified to include a χ2search routine. With this modification the technique becomes more general, more accurate, and applicable throughout the gradual phase of the flare. The model reproduces the light curves of the soft X-ray lines throughout these flares. Model fits were repeated for each flare using five different sets of published line emissivity calculations. The emissivities of Mewe and Gronenschild (1981) consistently gave the best fits to the observed light curves for each flare.

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