A three-dimensional model of spiral null pair to form ion-scale flux ropes in magnetic reconnection region observed by Cluster
A three-dimensional model of spiral null pair to form ion-scale flux ropes in magnetic reconnection region observed by Cluster
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Cluster观测到的磁重联区离子尺度磁通绳螺旋零对三维模型
DOI：
10.1063/1.5114620
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发表时间：
2019-11
影响因子：
2.2
通讯作者：
Weixing Wan
中科院分区：
文献类型：
--
作者：
Ruilong Guo;Zuyin Pu;Zhonghua Yao;Malcolm Dunlop;Yulia V. Bogdanova;Yong Wei;Xiaogang Wang;Chijie Xiao;Jiansen He;Suiyan Fu;Lun Xie;Andrew N. Fazakerley;Weixing Wan
三维磁重联区的磁结构和拓扑结构具有很强的动态性和复杂性。由于高时间步长的现场测量增加，重联流出区和扩散区经常检测到小尺度磁通绳和磁零点。以前的研究已经证明，X线和小尺度磁通绳都与零点有关。在这项研究中，通过应用与簇数据集的输入的拟合-重建方法，我们揭示了三种类型的螺旋零点对作为通量绳的骨架。两个螺旋空值可以通过骨架连接，也可以通过分隔符连接，也可以同时由骨架和分隔符连接。提出了一个理论模型来解释这些螺旋零点对。观测结果和模型表明，磁绳的磁环数目受两个零点的连接方式的制约，而磁绳则受两个零点及其扇面的限制。该模型预测，重联区的磁扰动可以改变零点的连接类型，最终导致磁通的演化。三维磁重联区的磁结构和拓扑结构具有明显的动态性和复杂性。由于高时间步长的现场测量增加，重联流出区和扩散区经常检测到小尺度磁通绳和磁零点。以前的研究已经证明，X线和小尺度磁通绳都与零点有关。在这项研究中，通过应用与簇数据集的输入的拟合-重建方法，我们揭示了三种类型的螺旋零点对作为通量绳的骨架。两个螺旋空值可以通过骨架连接，也可以通过分隔符连接，也可以同时由骨架和分隔符连接。提出了一个理论模型来解释这些螺旋零点对。观测结果和模型表明，磁绳的磁环数目受两个零点的连接方式的制约，而磁绳则受两个零点及其扇面的限制。国防部。
The magnetic structure and topology of the three-dimensional magnetic reconnection region are significantly dynamic and complex. Small-scale flux ropes and magnetic null points are frequently detected in the reconnection outflow region and diffusion region due to the increased in situ measurements at high temporal cadences. Previous studies have demonstrated that X-line and small-scale flux ropes are both related to null points. In this study, by applying a fitting-reconstruction method with the input of the Cluster dataset, we reveal three types of spiral null pairs that serve as the skeleton of the flux ropes. Two spiral nulls can be connected by a spine, or by a separator, or by both a spine and a separator. A theoretical model is proposed to explain these spiral null pairs. The observational results and the model indicate that the number of magnetic loops of the flux rope is restricted by the linkage pattern of two nulls, while the flux rope is confined by the two nulls and their fan surfaces. The model predicts that the magnetic perturbations in the reconnection region can transform the linkage types of the nulls and eventually lead to the evolution of flux ropes.The magnetic structure and topology of the three-dimensional magnetic reconnection region are significantly dynamic and complex. Small-scale flux ropes and magnetic null points are frequently detected in the reconnection outflow region and diffusion region due to the increased in situ measurements at high temporal cadences. Previous studies have demonstrated that X-line and small-scale flux ropes are both related to null points. In this study, by applying a fitting-reconstruction method with the input of the Cluster dataset, we reveal three types of spiral null pairs that serve as the skeleton of the flux ropes. Two spiral nulls can be connected by a spine, or by a separator, or by both a spine and a separator. A theoretical model is proposed to explain these spiral null pairs. The observational results and the model indicate that the number of magnetic loops of the flux rope is restricted by the linkage pattern of two nulls, while the flux rope is confined by the two nulls and their fan surfaces. The mod...
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DOI：
10.1007/978-90-481-3499-1
发表时间：
2010
期刊：
--
影响因子：
--
作者：
H. Laakso;Matthew Taylor;C. Escoubet
通讯作者：
H. Laakso;Matthew Taylor;C. Escoubet
DOI：
10.1098/rsta.1996.0136
发表时间：
1996-12
期刊：
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
影响因子：
--
作者：
E. Priest;Viacheslav Titov
通讯作者：
E. Priest;Viacheslav Titov
DOI：
10.1088/0004-637x/807/2/155
发表时间：
2015-07
期刊：
The Astrophysical Journal
影响因子：
--
作者：
V. Olshevsky;A. Divin;E. Eriksson;S. Markidis;G. Lapenta
通讯作者：
V. Olshevsky;A. Divin;E. Eriksson;S. Markidis;G. Lapenta
DOI：
10.1098/rsta.1945.0005
发表时间：
1945-11
期刊：
--
影响因子：
--
作者：
J. R. Green;R. Southwell
通讯作者：
J. R. Green;R. Southwell
影响因子：
10.3
作者：
Johnstone, AD;Alsop, C;Woodliffe, RD
通讯作者：
Woodliffe, RD