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Witnessing Tether-cutting Reconnection at the Onset of a Partial Eruption
Chen HC(陈何超)1,2,3; Duan, Yadan4; Yang JY(杨家艳)1,2; Yang B(杨波)1,2; Dai J(戴俊)1,2,3
Source PublicationASTROPHYSICAL JOURNAL
2018-12-10
Volume869Issue:1Pages:13
DOI10.3847/1538-4357/aaead1
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: activity Sun: filaments, prominences magnetic reconnection instabilities
Abstract

In this paper, we study the onset process of a solar eruption on 2015 February 21, focusing on its unambiguous precursor phase. With multiwavelength imaging observations from the Atmospheric Imaging Assembly (AIA), definitive tether-cutting (TC) reconnection signatures, i.e., flux convergence and cancellation, bidirectional jets, and topology change of hot loops, were clearly observed below the pre-eruption filament. As TC reconnection progressed between the sheared arcades that enveloped the filament, a channel-like magnetic flux rope (MFR) arose in multiwavelength AIA passbands wrapping around the main axis of the filament. With the subsequent ascent of the newborn MFR, the filament surprisingly split into three branches. After a 7 hr slow-rise phase, the high-lying branch containing the MFR abruptly accelerated causing a two-ribbon flare; while the two low-lying branches remained stable forming a partial eruption. Complemented by kinematic analysis and decay index calculation, we conclude that TC reconnection played a key role in building up the eruptive MFR and triggering its slow rise. The onset of the torus instability may have led the high-lying branch into the standard eruption scenario in the fashion of a catastrophe.

Funding ProjectNatural Science Foundation of China[11703084] ; Natural Science Foundation of China[11633008] ; Natural Science Foundation of China[11333007] ; Natural Science Foundation of China[11503081] ; CAS programs "Light of West China" and "QYZDJ-SSW-SLH012" ; Project of the Group for Innovation of Yunnan Province
Funding OrganizationNatural Science Foundation of China[11703084, 11633008, 11333007, 11503081] ; CAS programs "Light of West China" and "QYZDJ-SSW-SLH012" ; Project of the Group for Innovation of Yunnan Province
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000453283500011
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCORONAL MASS EJECTION ; SOLAR FILAMENT ERUPTIONS ; FLUX ROPE ERUPTION ; KINK INSTABILITY ; HELICAL FLUX ; EVOLUTION ; PROMINENCES ; CATASTROPHE ; MECHANISM
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18615
Collection太阳物理研究组
Corresponding AuthorChen HC(陈何超)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People's Republic of China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
3.University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
4.Yunnan Normal University, Department of Physics, Kunming 650500, Yunnan, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Chen HC,Duan, Yadan,Yang JY,et al. Witnessing Tether-cutting Reconnection at the Onset of a Partial Eruption[J]. ASTROPHYSICAL JOURNAL,2018,869(1):13.
APA Chen HC,Duan, Yadan,Yang JY,Yang B,&Dai J.(2018).Witnessing Tether-cutting Reconnection at the Onset of a Partial Eruption.ASTROPHYSICAL JOURNAL,869(1),13.
MLA Chen HC,et al."Witnessing Tether-cutting Reconnection at the Onset of a Partial Eruption".ASTROPHYSICAL JOURNAL 869.1(2018):13.
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