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| Title: | ANALYSIS OF MAGNETIC
FIELDS AND HARD X-RAY ON THE ACTIVE REGION NOAA 8088 |
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| Authors: | R. Falewicz, C. Mandrini, P. Rudawy, M. Siarkowski | |
| Abstract: | Exploring the X-ray and Ha observations of the C7.2 class solar flare in NOAA 8088 on 25 September 1997 we have previously build a self-consistent 3D model of its evolution and configuration of the magnetic fields. At present we describe results of the comprehensive 3-D numerical modelling of the magnetic fields of the same active region. Taking into account all limitations of the numerical modelling, we found two possible, different scenarios of the evolution and interactions of the magnetic fields during the flare. We found that selection of the genuine numerical model of the flare was possible only using results of the analysis of the broad set of the various observational data. A problem of evaluation of the true model of the event could be considered as very common. Using X-ray data taken with INTERBALL-Tail satellite we extended also our previous analysis of the relation between hard X-ray and microwave emission during the flash phase of the flare as well as temperatures during the early phase of the flare. We find that registrated pulses of hard X-ray and 3 GHz microwave fluxes show tendency to quasi-periodical repetition. Assuming thermal emission we calculated the effective electron temperature with one second time resolution. The obtained values indicates that group of pre-maximum peaks of the flare may be connected to non-thermal heating phase (lasting approximately 2-3 minutes) followed by thermal emission phase with temperatures decreasing from 45 to 25 MK during next 8 to 10 minutes. |
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| Figures: | Fig1.ps.gz (97k) |
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fig2.ps.gz (106k) |
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