We investigate the evolution of differential emission measure distribution (DEM[T]) in various phases of a B8.3 flare, which occurred on July 04, 2009. We analyze the soft X-ray (SXR) emission in 1.6-8.0 keV range, recorded collectively by Solar Photometer in X-rays (SphinX; Polish) and Solar X-ray Spectrometer (SOXS; Indian) instruments. We make a comparative investigation of the best-fit DEM[T] distributions derived by employing various inversion schemes viz. single gaussian, power-law, functions and Withbroe-Sylwester (W-S) maximum likelihood algorithm. In addition, SXR spectrum in three different energy bands viz. 1.6-5.0 keV (low), 5.0-8.0 keV (high) and 1.6-8.0 keV (combined) is analyzed to determine the dependence of the best-fit DEM[T] distribution on the selection of energy interval. The evolution of DEM[T] distribution, derived using W-S algorithm, reveals the plasma of multi-thermal nature during the rise to the maximum phase of the flare, while of isothermal nature in the post-maximum phase of the flare. Thermal energy content is estimated considering the flare plasma to be of 1) iso-thermal and 2) multi-thermal nature. We find that the energy content during the flare, estimated from the multi-thermal approach, is in good agreement with that derived using the iso-thermal assumption except during the maximum of the flare. Further, (multi-) thermal energy estimated employing low-energy band of the SXR spectrum result in higher values than that derived from the combined-energy band. On the contrary, the analysis of high-energy band of SXR spectrum lead to lower thermal energy than that estimated from the combined-energy band.
翻译:我们调查了2009年7月4日B8.3耀斑不同阶段不同排放测量分布的演变情况。我们分析了1.6-8.0克V范围(SXR)的软X射线(SXR)排放情况,由太阳光仪(SphinX;波兰)和太阳X光光分光仪(SOXS;印度)仪器共同记录。我们比较调查了采用各种转换方法(如:单毛沙兰、电法、功能和Webro-SylWester(W-S)最大可能性算法)产生的最佳DEM[T]分布。此外,SX光谱在三个不同的能源波段(SphinX;SphinX;波兰)和S-X光光谱仪仪(SX;印度)中,S-光谱仪(Sx)的最大热量分布最合适,从高热量波段到低热量阵阵列,从高热量阵列到低热量阵列(由W-S-S算出)的分布演变,显示多热量的血浆,在高热量假设中,而高热质的等的S-I值在使用最高能源级中,在估计的能源值中,从高热量分析是S-燃料值值值值值值值值值值中,从S-燃料值值值值值值值值值值值值中,从S-燃料值的数值值的数值值中,从S-直值的数值值中,从S-温度值中,从S-温度值的数值值中,从S-直值值值值值值值值值值值的数值值值的数值值的数值值的数值值的数值值的数值值值值值值值值值值值值值值值值值值值值值值值值值值值值值的数值是到比比值的数值值的数值值的数值值的数值值值值值值值值值值值值值的数值值的数值值的数值值的数值值值值的数值值值值值值值值的数值值的数值值的数值值值值值的数值值的数值值值值值的数值值的数值值的数值值的数值值的数值到比值的数值值到比值的