The dynamics of small-scale explosive phenomena in the lower corona have been simulated by solving the compressible magnetohydrodynamic equations. Numerical results show that the magnetic reconnections in a long coronal current sheet consist of a series of discrete small reconnection events, coalescence of magnetic islands, and plasmoid ejections, corresponding to the explosive events occurring intermittently and as bursts in a mentioned observational case. The generation of magnetic islands via multiple-X-point reconnection and their coalescence processes, to some extent, are qualitatively similar to the sequence of brightenings in the active region NOAA 8668. The strong ejections are possibly related to the recorded extreme ultraviolet (EUV) emitting structures. Morphological comparison and quantitative check of the plasma parameters support this candidate mechanism, and the idea that explosive events that appear to last long may not be single events, but a succession of explosive events either resolved or unresolved. The temporal energy conversion process is also examined.
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November 2003
Letter|
November 01 2003
Simulation of small-scale coronal explosives due to magnetic reconnections
Quan-Lin Fan;
Quan-Lin Fan
SIGMA Weather Group, Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, P.O. Box 8701, Beijing 100080, China
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Xue-Shang Feng;
Xue-Shang Feng
SIGMA Weather Group, Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, P.O. Box 8701, Beijing 100080, China
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Chang-Qing Xiang;
Chang-Qing Xiang
SIGMA Weather Group, Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, P.O. Box 8701, Beijing 100080, China
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Ding-Kun Zhong
Ding-Kun Zhong
SIGMA Weather Group, Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, P.O. Box 8701, Beijing 100080, China
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Phys. Plasmas 10, 4575–4578 (2003)
Article history
Received:
July 07 2003
Accepted:
August 29 2003
Citation
Quan-Lin Fan, Xue-Shang Feng, Chang-Qing Xiang, Ding-Kun Zhong; Simulation of small-scale coronal explosives due to magnetic reconnections. Phys. Plasmas 1 November 2003; 10 (11): 4575–4578. https://doi.org/10.1063/1.1620999
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