Partial eruption, confinement, and twist buildup and release of a double-decker filament
- We investigate the failed partial eruption of a filament system in NOAA AR 12104 on 2014 July 5, using multiwavelength EUV, magnetogram, and H alpha observations, as well as magnetic field modeling. The filament system consists of two almost co-spatial segments with different end points, both resembling a C shape. Following an ejection and a precursor flare related to flux cancellation, only the upper segment rises and then displays a prominent twisted structure, while rolling over toward its footpoints. The lower segment remains undisturbed, indicating that the system possesses a double-decker structure. The erupted segment ends up with a reverse-C shape, with material draining toward its footpoints, while losing its twist. Using the flux rope insertion method, we construct a model of the source region that qualitatively reproduces key elements of the observed evolution. At the eruption onset, the model consists of a flux rope atop a flux bundle with negligible twist, which is consistent with the observational interpretation that theWe investigate the failed partial eruption of a filament system in NOAA AR 12104 on 2014 July 5, using multiwavelength EUV, magnetogram, and H alpha observations, as well as magnetic field modeling. The filament system consists of two almost co-spatial segments with different end points, both resembling a C shape. Following an ejection and a precursor flare related to flux cancellation, only the upper segment rises and then displays a prominent twisted structure, while rolling over toward its footpoints. The lower segment remains undisturbed, indicating that the system possesses a double-decker structure. The erupted segment ends up with a reverse-C shape, with material draining toward its footpoints, while losing its twist. Using the flux rope insertion method, we construct a model of the source region that qualitatively reproduces key elements of the observed evolution. At the eruption onset, the model consists of a flux rope atop a flux bundle with negligible twist, which is consistent with the observational interpretation that the filament possesses a double-decker structure. The flux rope reaches the critical height of the torus instability during its initial relaxation, while the lower flux bundle remains in stable equilibrium. The eruption terminates when the flux rope reaches a dome-shaped quasi-separatrix layer that is reminiscent of a magnetic fan surface, although no magnetic null is found. The flux rope is destroyed by reconnection with the confining overlying flux above the dome, transferring its twist in the process.…
Author details: | Jialin Chen, Yingna SuORCiD, Rui LiuORCiD, Bernhard KliemORCiDGND, Qingmin ZhangORCiD, Haisheng JiORCiD, Tie LiuORCiD |
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DOI: | https://doi.org/10.3847/1538-4357/ac2ba1 |
ISSN: | 0004-637X |
ISSN: | 1538-4357 |
Title of parent work (English): | The astrophysical journal : an international review of spectroscopy and astronomical physics. |
Publisher: | Institute of Physics Publ. |
Place of publishing: | London |
Publication type: | Article |
Language: | English |
Date of first publication: | 2021/12/16 |
Publication year: | 2021 |
Release date: | 2024/09/17 |
Volume: | 923 |
Issue: | 2 |
Article number: | 142 |
Number of pages: | 16 |
Funding institution: | National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [41761134088, 11473071, 11790302, 11790300, 11773079, 41774150, 11925302, U1731241]; Chinese Academy of SciencesChinese Academy of Sciences [XDA15052200, XDA15320301]; DFG in the joint Sino-German programGerman Research Foundation (DFG) [NSFC41761134088/DFG KL817.8-1]; Strategic Priority Research Program on Space Science |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 50 Naturwissenschaften / 500 Naturwissenschaften und Mathematik |
Peer review: | Referiert |