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A Study of External Magnetic Reconnection that Triggers a Solar Eruption
Zhou, G. P.1; Zhang, J.2; Wang, J. X.1; Wheatland, M. S.3
2017-12-10
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume851Issue:1Pages:8
AbstractExternal magnetic reconnection (EMR) is suggested to play an essential role in triggering a solar eruption, but is rarely directly observed. Here, we report on a filament eruption on 2014 October 3 that apparently involves the process of an early EMR. A total of 1.7. x. 10(20) Mx lux first canceled along the filament-related polarity inversion line over 12 hr, and then the filament axis started to brighten in extreme ultraviolet (EUV). An impulsive EUV brightening began 30 minutes later, and we attribute this to EMR, as it is located at the center of a bidirectional outflow with a velocity of 60-75 km s(-1) along large-scale magnetic loops from active regions NOAA 12178 and 12179, respectively, and over the filament mentioned above. Following the EMR, the filament was activated; then, partial eruption occurred 6 minutes later in the west, in which the decay index above the magnetic flux rope (MFR) reached the critical value of 1.5. The observations are interpreted in terms of underlying magnetic flux cancelation leading to the buildup and eventual formation of the MFR with a filament embedded in it, and the MFR is elevated later. The activated MFR rises and pushes the overlying sheared field and forms a current sheet causing the EMR. The EMR in turn weakens the constraining effect of the overlying field, leading to the arising of the MFR, and subsequently erupting due to torus instability.
KeywordSun: activity Sun: atmosphere Sun: evolution Sun: filaments, prominences
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF
DOI10.3847/2041-8213/aa9c40
WOS KeywordCORONAL MASS EJECTIONS ; ACTIVE-REGION ; NUMERICAL SIMULATIONS ; FLUX TUBES ; FLARES ; FIELDS ; CANCELLATION ; PROMINENCES ; MODEL ; EMERGENCE
Language英语
Funding ProjectNational Natural Science Foundation of China[11322329] ; National Natural Science Foundation of China[11533008] ; National Natural Science Foundation of China[11573038] ; Chinese Academy of Science Project[KJCX2-EW-T07] ; NSF[AGS-1156120] ; NSF[AGS-1249270]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000417542100001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37339
Collection中国科学院国家天文台
Corresponding AuthorZhou, G. P.
Affiliation1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
2.George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA
3.Univ Sydney, Sydney Inst Astron, Sch Phys, Sydney, NSW, Australia
Recommended Citation
GB/T 7714
Zhou, G. P.,Zhang, J.,Wang, J. X.,et al. A Study of External Magnetic Reconnection that Triggers a Solar Eruption[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,851(1):8.
APA Zhou, G. P.,Zhang, J.,Wang, J. X.,&Wheatland, M. S..(2017).A Study of External Magnetic Reconnection that Triggers a Solar Eruption.ASTROPHYSICAL JOURNAL LETTERS,851(1),8.
MLA Zhou, G. P.,et al."A Study of External Magnetic Reconnection that Triggers a Solar Eruption".ASTROPHYSICAL JOURNAL LETTERS 851.1(2017):8.
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