Plasma Kernels in Homologous (?) Flares

Title:		Plasma Kernels in Homologous (?) Flares
Authors:		B. Sylwester, J. Sylwester, A. Kępa
Abstract:		We have analyzed a series of five flares using the X-ray images from Yohkoh SXT and HXT telescopes. The flares took place at the eastern solar limb on 1991 December 9 within the same active region. The sequences of SXT images have been beforehand deconvolved and carefully coaligned, making use of the spacecraft pointing data files. By using filter ratio technique the structure and average thermodynamic parameters of individual plasma kernels of these flares have been analyzed. Hard X-ray emission patterns have been MEM-reconstructed from the HXT data. The hard and the soft X-ray images have been coaligned and locations of corresponding kernels in individual flares have been determined as seen in individual energy bands. The time variations of these kernels' locations have been investigated and their relative positions analyzed. The overall flare heating behavior has been investigated using the GOES soft X-ray data. We observe and discuss general similarity in the basic arrangement of brighter soft X-ray emitting structures tracing the magnetic links for the analyzed events.