Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-04-07
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
11 pages, 1 figure, accepted for publication in Central European Astrophysical Bulletin
Scientific paper
As it was shown by many authors, a slow decrease in X-rays observed during the decay phase of long duration flares (LDE) can be explained only by a magnetic reconnection and energy release ceaselessly ongoing in the coronal part of a flare. Using RHESSI data we try to answer two following questions. How effective are these processes at the LDEs decay phase and how can precisely the energy release rate be calculated based on these data? To answer the questions images of the selected LDEs during their decay phase were reconstructed. Physical parameters of flare coronal sources obtained from image spectral analysis allowed us to study the efficiency of the energy release process. We also examined terms included in the energy equation to find out what is the accuracy of determination of each term.
Bak-Steslicka Urszula
Kolomanski Sylwester
Koltun Zbigniew
Mrozek Tomasz
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