How flux feeding causes eruptions of solar magnetic flux ropes with the hyperbolic flux tube configuration
How flux feeding causes eruptions of solar magnetic flux ropes with the hyperbolic flux tube configuration
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磁通馈送如何导致双曲磁通管配置的太阳能磁通绳爆发
DOI：
10.1051/0004-6361/202039944
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发表时间：
2021-01
影响因子：
6.5
通讯作者：
Li Xiaolei
中科院分区：
文献类型：
--
作者：
Zhang Quanhao;Liu Rui;Wang Yuming;Zhou Zhenjun;Zhuang Bin;Li Xiaolei
日冕磁通绳一般被认为是大规模太阳爆发的核心结构。最近的观测发现，太阳爆发可能是由一系列的“通量馈送”引发的，在此期间，色球纤维从下面向上升起，并与先前存在的日珥合并。进一步的理论研究证实，磁通供给机制是有效的，导致爆发的磁通绳被光头补丁分界面包裹。但目前还不清楚通量馈送如何影响双曲线通量管（HFT）包裹的日冕通量绳，以及它是否能够导致通量绳喷发。在本文中，我们使用一个2.5维磁流体动力学模型来模拟在HFT配置的磁通馈送过程。结果表明，通磁后，磁绳的轴向磁通被注入磁绳中，而磁绳的极向磁通被减小。如果注入的轴向磁通量足够大，从而达到磁绳的临界轴向磁通量，则磁通供给能够导致磁绳爆发。否则，磁通绳系统演化到一个稳定的平衡状态后，磁通供给，这可能是更远离爆发的开始，表明磁通供给可以稳定绳系统与HFT配置在这种情况下。
Coronal magnetic flux ropes are generally considered to be the core structure of large-scale solar eruptions. Recent observations found that solar eruptions could be initiated by a sequence of "flux feeding," during which chromospheric fibrils rise upward from below, and merge with a pre-existing prominence. Further theoretical study has confirmed that the flux feeding mechanism is efficient in causing the eruption of flux ropes that are wrapped by bald patch separatrix surfaces. But it is unclear how flux feeding influences coronal flux ropes that are wrapped by hyperbolic flux tubes (HFT), and whether it is able to cause the flux-rope eruption. In this paper, we use a 2.5-dimensional magnetohydrodynamic model to simulate the flux feeding processes in HFT configurations. It is found that flux feeding injects axial magnetic flux into the flux rope, whereas the poloidal flux of the rope is reduced after flux feeding. Flux feeding is able to cause the flux rope to erupt, provided that the injected axial flux is large enough so that the critical axial flux of the rope is reached. Otherwise, the flux rope system evolves to a stable equilibrium state after flux feeding, which might be even farther away from the onset of the eruption, indicating that flux feeding could stabilize the rope system with the HFT configuration in this circumstance.
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DOI：
10.1086/519551
发表时间：
2007-05
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Yao Chen;Yao Chen;You-qiu Hu;S. J. Sun
通讯作者：
Yao Chen;Yao Chen;You-qiu Hu;S. J. Sun
DOI：
10.1088/0004-637x/737/1/14
发表时间：
2011-08
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Chengcai Shen;Jun Lin;N. Murphy
通讯作者：
Chengcai Shen;Jun Lin;N. Murphy
影响因子：
1.8
作者：
Haimin Wang;Chang Liu
通讯作者：
Haimin Wang;Chang Liu
影响因子：
6.5
作者：
M. Bárta;B. Vršnak;M. Karlický
通讯作者：
M. Bárta;B. Vršnak;M. Karlický
DOI：
10.1088/0004-637x/706/2/1438
发表时间：
2008-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
B. Joshi;A. Veronig;K. Cho;S. Bong;Y. Moon;Jeongwoo Lee;B. Somov;P. K. Manoharan;Y. H. Kim
通讯作者：
B. Joshi;A. Veronig;K. Cho;S. Bong;Y. Moon;Jeongwoo Lee;B. Somov;P. K. Manoharan;Y. H. Kim