标题： 能量分配在四个受限圆带耀斑中 显示英文标题

标题： Energy Partition in Four Confined Circular-Ribbon Flares

摘要： 在本研究中，我们调查了太阳盘面中心附近观测到的四个限制性圆带状耀斑（CRFs）的能量分配，这些耀斑同时由SDO、GOES和RHESSI观测到。 我们计算了不同的能量分量，包括1$-$8、1$-$70和70$-$370{\AA }范围内的辐射输出、总辐射损失、从GOES和RHESSI推导出的峰值热能、耀斑加速电子的非热能以及耀斑前磁场自由能。 结果表明，能量分量随耀斑等级系统地增加，这表明更大规模的耀斑涉及更多的能量。 磁场自由能大于耀斑的非热能和辐射输出，这与耀斑的磁场性质一致。 四个耀斑的磁场自由能与非热能之比$\frac{E_{nth}}{E_{mag}}$为0.70$-$0.76，明显高于爆发型耀斑的比值。 因此，这一比值可能作为区分限制性和爆发型耀斑的重要因素。 非热能足以提供包括峰值热能和辐射损失在内的加热需求。 我们的发现对限制性CRFs的理论模型提出了约束，并且对空间天气预报具有潜在意义。 显示英文摘要

摘要： In this study, we investigated the energy partition of four confined circular-ribbon flares (CRFs) near the solar disk center, which are observed simultaneously by SDO, GOES, and RHESSI. We calculated different energy components, including the radiative outputs in 1$-$8, 1$-$70, and 70$-$370 {\AA}, total radiative loss, peak thermal energy derived from GOES and RHESSI, nonthermal energy in flare-accelerated electrons, and magnetic free energy before flares. It is found that the energy components increase systematically with the flare class, indicating that more energies are involved in larger flares. The magnetic free energies are larger than the nonthermal energies and radiative outputs of flares, which is consistent with the magnetic nature of flares. The ratio $\frac{E_{nth}}{E_{mag}}$ of the four flares, being 0.70$-$0.76, is considerably higher than that of eruptive flares. Hence, this ratio may serve as an important factor that discriminates confined and eruptive flares. The nonthermal energies are sufficient to provide the heating requirements including the peak thermal energy and radiative loss. Our findings impose constraint on theoretical models of confined CRFs and have potential implication for the space weather forecast.