Energy partition in two M-class circular-ribbon flares
| Autor: | Y. Su, Qi Zhang, J. X. Cheng, Lei Lu, Junhong Chen, Dong Li, Yu Huang, Long-Long Feng, Tuanhui Zhou |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Solar flare Astrophysics::High Energy Astrophysical Phenomena Gamma ray FOS: Physical sciences Astronomy and Astrophysics Plasma Electron 01 natural sciences law.invention Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science law 0103 physical sciences Ribbon Physics::Space Physics Radiative transfer Astrophysics::Solar and Stellar Astrophysics Atomic physics 010303 astronomy & astrophysics Energy (signal processing) Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences Flare |
| DOI: | 10.48550/arxiv.1908.02685 |
| Popis: | In this paper, we investigate the energy partition of two homologous M1.1 circular-ribbon flares (CRFs) in active region (AR) 12434. They were observed by \textit{SDO}, \textit{GOES}, and \textit{RHESSI} on 2015 October 15 and 16, respectively. The peak thermal energy, nonthermal energy of flare-accelerated electrons, total radiative loss of hot plasma, and radiant energies in 1$-$8 {\AA} and 1$-$70 {\AA} of the flares are calculated. The two flares have similar energetics. The peak thermal energies are (1.94$\pm$0.13)$\times$10$^{30}$ erg. The nonthermal energies in flare-accelerated electrons are (3.9$\pm$0.7)$\times$10$^{30}$ erg. The radiative outputs of the flare loops in 1$-$70 {\AA}, which are $\sim$200 times greater than the outputs in 1$-$8 {\AA}, account for $\sim$62.5\% of the peak thermal energies. The radiative losses of SXR-emitting plasma are one order of magnitude lower than the peak thermal energies. Therefore, the total heating requirements of flare loops including radiative loss are (2.1$\pm$0.1)$\times$10$^{30}$ erg, which could sufficiently be supplied by nonthermal electrons. Comment: 17 pages, 12 figures, accepted by ApJ |
| Databáze: | OpenAIRE |
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