Confined and Eruptive Catastrophes of Solar Magnetic Flux Ropes Caused by Mass Loading and Unloading
Confined and Eruptive Catastrophes of Solar Magnetic Flux Ropes Caused by Mass Loading and Unloading
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质量加载和卸载引起的太阳磁通量绳的封闭和喷发灾难
DOI：
10.3847/1538-4357/ac1fef
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发表时间：
2021-08
影响因子：
4.9
通讯作者：
Lyu Shaoyu
中科院分区：
文献类型：
--
作者：
Zhang Quanhao;Liu Rui;Wang Yuming;Li Xiaolei;Lyu Shaoyu
人们普遍认为日冕磁通绳是大规模太阳喷发活动的核心结构，对日地系统产生巨大影响。先前的研究表明，日冕磁通绳系统的不同磁特性可能会导致磁绳灾难，从而引发太阳喷发活动。由于磁绳的总质量在稳定磁绳方面也起着重要作用，因此我们在本文中使用 2.5 维磁流体动力学数值模拟来研究磁绳随着其总质量的变化如何演变。研究发现，减少绳索总质量的卸载过程可能会导致磁通绳系统发生向上（喷发）灾难，在此期间绳索向上跳跃并释放磁能。这表明质量卸载过程可能引发磁力绳的喷发。此外，当系统不太扩散时，总质量积累的质量加载过程也可能导致向下（受限）灾难。然而，在向下灾难期间，磁能会增加，这表明质量加载过程可能会导致有限的活动，这可能有助于在日冕爆发之前储存能量。
It is widely accepted that coronal magnetic flux ropes are the core structures of large-scale solar eruptive activities, which have a dramatic impact on the solar-terrestrial system. Previous studies have demonstrated that varying magnetic properties of a coronal flux rope system could result in a catastrophe of the rope, which may trigger solar eruptive activities. Since the total mass of a flux rope also plays an important role in stabilizing the rope, we use 2.5 dimensional magnetohydrodynamic numerical simulations in this article to investigate how a flux rope evolves as its total mass varies. It is found that an unloading process that decreases the total mass of the rope could result in an upward (eruptive) catastrophe in the flux rope system, during which the rope jumps upward and the magnetic energy is released. This indicates that mass unloading processes could initiate the eruption of the flux rope. Moreover, when the system is not too diffusive, there is also a downward (confined) catastrophe that could be caused by mass loading processes via which the total mass accumulates. The magnetic energy, however, is increased during the downward catastrophe, indicating that mass loading processes could cause confined activities that may contribute to the storage of energy before the onset of coronal eruptions.
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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：
10.3847/1538-4357/ab9d7f
发表时间：
2020-06
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Yuhong Fan
通讯作者：
Yuhong Fan
影响因子：
20.9
作者：
S. Gibson
通讯作者：
S. Gibson
影响因子：
4.1
作者：
Y. Hu
通讯作者：
Y. Hu
影响因子：
20.9
作者：
S. Parenti
通讯作者：
S. Parenti