论文标题
太阳活性区域中的电流中和及其与喷发活性的关系
Electric Current Neutralization in Solar Active Regions and Its Relation to Eruptive Activity
论文作者
论文摘要
众所周知，与电流相关的磁性自由能太阳耀斑和太阳能活动区（ARS）的冠状质量弹出（CME）。但是，确定AR是否会产生喷发的条件尚不清楚。先前的工作表明，驱动电流的程度，或单个磁性极性内的所有电流的总和都可以中和，可以作为评估AR产生喷发能力的良好代理。在这里，我们使用15个耀斑活性和15个耀斑Quiet ARS的样本研究了当前中和/CME产生的关系。所有耀斑Quiet和4个耀斑活跃的AR也均为CME Quiet。我们还测试了当前中和与AR中极性反转线（PIL）的剪切程度的关系。我们发现，耀斑生产的ARS更有可能表现出非中和电流，特别是那些也会产生CME的电流。我们发现，耀斑/CME活性ARS也比Flare/CME-Quiet Ars表现出更高的PIL剪切度。我们还观察到，在耀斑Quiet Ars中的磁通量出现过程中，电流变得更加中和。我们的研究表明，AR中的当前中和表明其喷发潜力。
It is well established that magnetic free energy associated with electric currents powers solar flares and coronal mass ejections (CMEs) from solar active regions (ARs). However, the conditions that determine whether an AR will produce an eruption are not well understood. Previous work suggests that the degree to which the driving electric currents, or the sum of all currents within a single magnetic polarity, are neutralized may serve as a good proxy for assessing the ability of ARs to produce eruptions. Here, we investigate the relationship between current neutralization and flare/CME production using a sample of 15 flare-active and 15 flare-quiet ARs. All flare-quiet and 4 flare-active ARs are also CME-quiet. We additionally test the relation of current neutralization to the degree of shear along polarity inversion lines (PILs) in an AR. We find that flare-productive ARs are more likely to exhibit non-neutralized currents, specifically those that also produce a CME. We find that flare/CME-active ARs also exhibit higher degrees of PIL shear than flare/CME-quiet ARs. We additionally observe that currents become more neutralized during magnetic flux emergence in flare-quiet ARs. Our investigation suggests that current neutralization in ARs is indicative of their eruptive potential.
