A new insight into X-ray coronal sources of solar  flares

Sylwester Kołomański, Tomasz Mrozek and Ewa Chmielewska

Loop-top coronal X-ray sources (LTSs) are common characteristics of solar flares. The nature of the sources was difficult to uncover for many years. It seems that at last, combining data from RHESSI and SDO/AIA, there is a possibility to answer the questions about formation, evolution and structure of LTSs. We present the study of a LTS of the SOL2011-10-22T11:10 long-duration  are observed simultaneously with RHESSI and SDO/AIA. Such a complementary data enables to study a relation between the X-ray LTSs and structures observed in EUV during the  flare. We found that X-ray emission recorded by RHESSI, visible as the LTS came from the part of a hot supra-arcade region that had the highest emission measure and simultaneously the temperature within the range of RHESSI thermal-response. However, while the supra-arcade region consisted of small-scale structures, the LTS seemed to be structureless. We ran simulations using RHESSI data, but we were not able to recover any small-scale structure of the LTS.

Proceedings of the Polish Astronomical Society, vol. 3, 104-107 (2016)

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