Connecting theory of plasmoid-modulated reconnection to observations of solar flares
Connecting theory of plasmoid-modulated reconnection to observations of solar flares
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将等离子体调制重联理论与太阳耀斑观测联系起来
DOI：
10.1017/exp.2022.23
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发表时间：
2022
影响因子：
--
通讯作者：
Hillier A
中科院分区：
文献类型：
--
作者：
Hillier A
太阳耀斑重联过程的短时间尺度长期以来一直被证明是一个谜。最近的研究表明，在重连电流片中形成等离子体流的重要性，用伦德奎斯特数的负幂来量化电流片的宽长比，即是理解等离子体流形成的开始的关键。在本文中，我们首次将该纵横比的理论标度应用于观测到的耀斑，以评估等离子体的形成如何与观测相联系。对于三种显示等离子体的不同耀斑，我们发现其值范围为。这个小范围内的数值意味着等离子体可能在理论预测的临界纵横比（）达到之前就形成了，这可能对理论模型提出挑战。
The short timescale of the solar flare reconnection process has long proved to be a puzzle. Recent studies suggest the importance of the formation of plasmoids in the reconnecting current sheet, with quantifying the aspect ratio of the width to length of the current sheet in terms of a negative power of the Lundquist number, that is, , being key to understanding the onset of plasmoids formation. In this paper, we make the first application of theoretical scalings for this aspect ratio to observed flares to evaluate how plasmoid formation may connect with observations. For three different flares that show plasmoids we find a range of values of to . The values in this small range implies that plasmoids may be forming before the theoretically predicted critical aspect ratio ( ) has been reached, potentially presenting a challenge for the theoretical models.
电阻磁流体力学的撕裂不稳定性
DOI：
10.1007/978-3-030-16343-3_2
发表时间：
2019
期刊：
Topics in Magnetohydrodynamic Topology, Reconnection and Stability Theory
影响因子：
--
作者：
D. MacTaggart
通讯作者：
D. MacTaggart
DOI：
10.1088/0004-637x/805/2/135
发表时间：
2015-04
期刊：
The Astrophysical Journal
影响因子：
--
作者：
S. Takasao;Takuma Matsumoto;N. Nakamura;K. Shibata
通讯作者：
S. Takasao;Takuma Matsumoto;N. Nakamura;K. Shibata