Energy Partition in Two M-class Circular-ribbon Flares

Energy Partition in Two M-class Circular-ribbon Flares
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两个M级圆带状耀斑的能量分配

DOI:
10.3847/1538-4357/ab3a52
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发表时间:
2019-08
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
L. Feng
L. Feng
中科院分区:
其他
文献类型:
--
作者:
Q. M. Zhang;J. X. Cheng;L. Feng

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本文研究了活动区(AR)12434中两个同源的M1.1圆带耀斑(CRF)的能量分配。它们分别于2015年10月15日和16日被SDO,GOES和RHESSI观测到。计算了耀斑加速电子的峰值热能、非热能、热等离子体的总辐射损失以及耀斑在1-8 μ m和1-70 μ m的辐射能。这两个耀斑具有相似的能量。峰值热能为(1.94 ± 0.13)× 10 ~(30)erg。耀斑加速电子的非热能为(3.9 ± 0.7)× 1030 erg。耀斑环1-70 ° C的辐射输出占峰值热能的62.5%,是1-8 ° C的200倍。发射SXR的等离子体的辐射损失比峰值热能低一个数量级。因此,包括辐射损失在内,耀斑环的总加热需求为(2.1 ± 0.1)× 1030 erg,非热电子足以满足这一需求。
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 SDO, GOES, and 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 Å and 1–70 Å of the flares are calculated. The two flares have similar energetics. The peak thermal energies are (1.94 ± 0.13) × 1030 erg. The nonthermal energies in flare-accelerated electrons are (3.9 ± 0.7) × 1030 erg. The radiative outputs of the flare loops in 1–70 Å, which are ∼200 times greater than the outputs in 1–8 Å, account for ∼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 ± 0.1) × 1030 erg, which could sufficiently be supplied by nonthermal electrons.
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