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arXiv 1905.01201astro-ph.SRphysics.plasm-phphysics.space-ph
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受限太阳耀斑中的等离子体团不稳定性

The plasmoid instability in a confined solar flare

David MacTaggart, Lyndsay Fletcher

摘要:

爆发耀斑(EFs)与爆发的暗条有关,在某些模型中,暗条爆发驱动耀斑重联。然而,最近,对局限耀斑(CF)的观测揭示了EF的所有特征(脉冲相,耀斑带等)。而不是灯丝喷发本身。因此,如果暗条不是脉冲耀斑重联的主要原因,那是什么呢?在这封信中,我们认为,基于mimpermance的要求,等离子体团不稳定性是一个强有力的候选人解释所观察到的CF脉冲阶段。我们提出的磁流体动力学模拟结果的非线性发展的等离子体团不稳定性,在一个模型的活动区域磁场的几何形状,以加强我们的要求。我们还讨论了如何在这封信中描述的想法可以推广到其他情况下,包括EF。

英文摘要:

Eruptive flares (EFs) are associated with erupting filaments and, in some models, filament eruption drives flare reconnection. Recently, however, observations of a confined flare (CF) have revealed all the hallmarks of an EF (impulsive phase, flare ribbons, etc.) without the filament eruption itself. Therefore, if the filament is not primarily responsible for impulsive flare reconnection, what is? In this Letter, we argue, based on mimimal requirements, that the plasmoid instability is a strong candidate for explaining the impulsive phase in the observed CF. We present magnetohydrodynamic simulation results of the nonlinear development of the plasmoid instability, in a model active region magnetic field geometry, to strengthen our claim. We also discuss how the ideas described in this Letter can be generalised to other situations, including EFs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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