Analysis of the differential emission measure distributions for solar flares observed by RESIK

Abstract The Polish X-ray spectrometer RESIK observed the spectra in four wavelength bands from 3.3 A to 6.1 A. This spectral range contains many emission lines of H- and He-like ions for Si, S, Ar and K formed in the high temperature of solar coronal plasma. Analysis of measured spectra gives a possibility to study the differential emission measure distributions (DEM) in the temperature range between 1 MK and 30 MK. We present the analysis of DEM distributions of the multi-peaked C9.8 flare observed by RESIK on 9 January 2003 adopting the model of elementary flare profile (EFP). The model allows to distinguish the individual flare components based on the observed light curves in selected spectral bands.