On the Possible Mechanisms of Energy Release in a C-class Flare
Abstract
We present the study of the C2.4 flare which occurred at 9:35 UT, 2011 August 10 in the AR 11263 near the western limb. It was observed by RATAN-600 and the Siberian Solar Radio Spectropolarimeter in microwaves (MW) and by RHESSI and FERMI in hard X-rays (HXR). A peculiarity of this event was the detection of HXR flux with energies above 25 keV that is not typical for such weak flares. The good correlation between HXR and MW time profiles indicates the generation of both HXR and MW emission by a common population of electrons. Results of fitting the HXR spectra revealed that the flare emission of energies above 25 keV could be generated both by non-thermal electrons and a high-temperature source (T> 30 MK). We reconstructed the microwave spectra using the GX_Simulator code for 3D modeling of gyrosynchrotron microwave emission (Fleischmann et al., 2011) . The input flare plasma parameters were obtained from HXR spectra and the magnetic field structure was obtained by extrapolation of the photospheric magnetic field from HMI/SDO. The results were compared with existing theoretical models and observations of other authors.
- Publication:
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Central European Astrophysical Bulletin
- Pub Date:
- 2013
- Bibcode:
- 2013CEAB...37..573K
- Keywords:
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- solar flare;
- energy release;
- energy transport;
- radiation mechanisms