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Formation and Initiation of Erupting Flux Rope and Embedded Filament Driven by Photospheric Converging Motion
Zhao, Xiaozhou1,2,3; Xia, Chun2; Keppens, Rony2; Gan, Weiqun1
2017-06-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume841Issue:2Pages:21
Corresponding AuthorZhao, Xiaozhou(zhaoxz@pmo.ac.cn)
AbstractIn this paper, we study how a flux rope (FR) is formed and evolves into the corresponding structure of a coronal mass ejection (CME) numerically driven by photospheric converging motion. A two-and-a-half-dimensional magnetohydrodynamics simulation is conducted in a chromosphere-transition-corona setup. The initial arcade-like linear force-free magnetic field is driven by an imposed slow motion converging toward the magnetic inversion line at the bottom boundary. The convergence brings opposite-polarity magnetic flux to the polarity inversion, giving rise to the formation of an FR by magnetic reconnection and eventually to the eruption of a CME. During the FR formation, an embedded prominence gets formed by the levitation of chromospheric material. We confirm that the converging flow is a potential mechanism for the formation of FRs and a possible triggering mechanism for CMEs. We investigate the thermal, dynamical, and magnetic properties of the FR and its embedded prominence by tracking their thermal evolution, analyzing their force balance, and measuring their kinematic quantities. The phase transition from the initiation phase to the acceleration phase of the kinematic evolution of the FR was observed in our simulation. The FR undergoes a series of quasi-static equilibrium states in the initiation phase; while in the acceleration phase the FR is driven by Lorentz force and the impulsive acceleration occurs. The underlying physical reason for the phase transition is the change of the reconnection mechanism from the Sweet-Parker to the unsteady bursty regime of reconnection in the evolving current sheet underneath the FR.
Keywordinstabilities magnetic reconnection magnetohydrodynamics methods: numerical Sun: coronal mass ejections Sun: filaments,prominences
DOI10.3847/1538-4357/aa7142
WOS KeywordCORONAL MASS EJECTIONS ; FREE MAGNETIC-FIELD ; SOLAR-FLARES ; CURRENT SHEETS ; PARTICLE-ACCELERATION ; NUMERICAL EXPERIMENTS ; PROMINENCE FORMATION ; RECONNECTION ; MODEL ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000402560200007
PublisherIOP PUBLISHING LTD
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22986
Collection中国科学院紫金山天文台
Corresponding AuthorZhao, Xiaozhou
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Katholieke Univ Leuven, Dept Math, Ctr Math Plasma Astrophys, Celestijnenlaan 200B, B-3001 Leuven, Belgium
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Xiaozhou,Xia, Chun,Keppens, Rony,et al. Formation and Initiation of Erupting Flux Rope and Embedded Filament Driven by Photospheric Converging Motion[J]. ASTROPHYSICAL JOURNAL,2017,841(2):21.
APA Zhao, Xiaozhou,Xia, Chun,Keppens, Rony,&Gan, Weiqun.(2017).Formation and Initiation of Erupting Flux Rope and Embedded Filament Driven by Photospheric Converging Motion.ASTROPHYSICAL JOURNAL,841(2),21.
MLA Zhao, Xiaozhou,et al."Formation and Initiation of Erupting Flux Rope and Embedded Filament Driven by Photospheric Converging Motion".ASTROPHYSICAL JOURNAL 841.2(2017):21.
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