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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
发表期刊ASTROPHYSICAL JOURNAL
2018-12-10
卷号869期号:1页码:13
DOI10.3847/1538-4357/aaead1
产权排序第1完成单位
收录类别SCI
关键词Sun: activity Sun: filaments, prominences magnetic reconnection instabilities
摘要

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.

资助项目Natural 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
项目资助者Natural 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
语种英语
学科领域天文学 ; 太阳与太阳系 ; 太阳物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000453283500011
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CORONAL MASS EJECTION ; SOLAR FILAMENT ERUPTIONS ; FLUX ROPE ERUPTION ; KINK INSTABILITY ; HELICAL FLUX ; EVOLUTION ; PROMINENCES ; CATASTROPHE ; MECHANISM
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/18615
专题太阳物理研究组
通讯作者Chen HC(陈何超)
作者单位1.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
推荐引用方式
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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