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Formation and Eruption of an Active Region Sigmoid. II. Magnetohydrodynamic Simulation of a Multistage Eruption
Jiang, Chaowei; Feng, Xueshang; Hu, Qiang
作者部门空间科学部
发表期刊ASTROPHYSICAL JOURNAL
2018
卷号866期号:2页码:96
DOI10.3847/1538-4357/aadd08
ISSN0004-637X
语种英语
关键词magnetohydrodynamics (MHD) methods: numerical Sun: corona Sun: coronal mass ejections (CMEs) Sun: flares Sun: magnetic fields
摘要Solar eruptions, mainly eruptive flares with coronal mass ejections, represent the most powerful drivers of space weather. Due to the low plasma-beta nature of the solar corona, solar eruption has its roots in the evolution of the coronal magnetic field. Although various theoretical models of the eruptive magnetic evolution have been proposed, they still oversimplify the realistic process in observation, which shows a much more complex process due to the invisible complex magnetic environment. In this paper, we continue our study of a complex sigmoid eruption in solar active region. 11283, which is characterized by a multipolar configuration embedding a null-point topology and a sigmoidal magnetic flux rope. Based on extreme ultraviolet observations, it has been suggested that a three-stage magnetic reconnection scenario might explain the complex flare process. Here we reproduce the complex magnetic evolution during the eruption using a data-constrained high-resolution magnetohydrodynamic (MHD) simulation. The simulation clearly demonstrates three reconnection episodes, which occurred in sequence in different locations in the corona. Through these reconnections, the initial sigmoidal flux rope breaks one of its legs, and quickly gives birth to a new tornado-like magnetic structure that is highly twisted and has multiple connections to the Sun due to the complex magnetic topology. The simulated magnetic field configuration and evolution are found to be consistent with observations of the corona loops, filaments, and flare ribbons. Our study demonstrates that significant insight into a realistic, complex eruption event can be gained by a numerical MHD simulation that is constrained or driven by observed data.
收录类别SCI
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文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6561
专题空间科学部
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Jiang, Chaowei,Feng, Xueshang,Hu, Qiang. Formation and Eruption of an Active Region Sigmoid. II. Magnetohydrodynamic Simulation of a Multistage Eruption[J]. ASTROPHYSICAL JOURNAL,2018,866(2):96.
APA Jiang, Chaowei,Feng, Xueshang,&Hu, Qiang.(2018).Formation and Eruption of an Active Region Sigmoid. II. Magnetohydrodynamic Simulation of a Multistage Eruption.ASTROPHYSICAL JOURNAL,866(2),96.
MLA Jiang, Chaowei,et al."Formation and Eruption of an Active Region Sigmoid. II. Magnetohydrodynamic Simulation of a Multistage Eruption".ASTROPHYSICAL JOURNAL 866.2(2018):96.
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