Dynamics of Threads Wrapping a Filamentʼs Leg Prior to the Eruption on 2021 October 28

doi:10.3847/1538-4357/acf19e

	Dynamics of Threads Wrapping a Filamentʼs Leg Prior to the Eruption on 2021 October 28
	Fang, Yue 2; Zhang, Jun 2; Bi Y(毕以)1; Song, Zhiping 2
刊名	ASTROPHYSICAL JOURNAL
	2023-10-01
卷号	955 期号:2
ISSN号	0004-637X
DOI	10.3847/1538-4357/acf19e
产权排序	第2完成单位
文献子类	Article
英文摘要	Although the magnetic field structures of solar filaments have been studied for several decades, the detailed evolution of the structure around a filament prior to its eruption is rarely observed. On 2021 October 28 in AR 12887, a major solar flare (X1.0 class) occurred at 15:35 UT. Based on the Solar Dynamics Observatory high-spatial-resolution observations, we find this flare is associated with the eruption of two filaments, namely F1 and F2. The two filaments are initially independent. The western leg (WLEG) of F1 approaches the northern leg of F2, due to the continuous movement and rotation of the magnetic field in which the WLEG roots in. We find first that there are some threads wrapping the WLEG. Brightening and bidirectionally plasmoid flows that originate from a brightening are detected in these threads, then the threads disappear, and the two filaments connect. NLFFF extrapolation reveals that there is a toroidal magnetic structure enveloping the WLEG and corresponding spatially to the threads. It is expected that a filament is enveloped by toroidal magnetic fields. According to the observations and extrapolation, we suggest that these threads represent the toroidal magnetic fields wrapping the WLEG. This paper provides new details about the dynamics of the toroidal magnetic fields. Magnetic reconnection takes place in the toroidal fields and thus destroys the fields, then F1 and F2 connect, and subsequently, the two filaments erupt and the flare occurs.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	The authors are grateful to the anonymous referee for valuable suggestions improving this paper. The data are used courtesy of the SDO, GONG, and GOES science teams. SDO is a mission of NASA's Living With a Star Program. This work is supported by the Natio ; GOES science teams[2021YFA1600500] ; GOES science teams[2019YFA0405000] ; National Key Ramp ; amp ; D Programs of China[12073001] ; National Key Ramp ; amp ; D Programs of China[12273106] ; National Key Ramp ; amp ; D Programs of China[Z010118169] ; National Natural Science Foundations of China
WOS关键词	TETHER-CUTTING RECONNECTION ; CORONAL MASS EJECTION ; MAJOR SOLAR EVENT ; FILAMENT ERUPTIONS ; FLUX-ROPE ; MAGNETIC RECONNECTION ; SIGMOIDAL FILAMENT ; FLARE ; SUNSPOT ; ONSET
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001070890600001
资助机构	The authors are grateful to the anonymous referee for valuable suggestions improving this paper. The data are used courtesy of the SDO, GONG, and GOES science teams. SDO is a mission of NASA's Living With a Star Program. This work is supported by the Natio ; GOES science teams[2021YFA1600500, 2019YFA0405000] ; National Key Ramp ; amp ; D Programs of China[12073001, 12273106, Z010118169] ; National Natural Science Foundations of China
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26216]
专题	云南天文台_抚仙湖太阳观测站
通讯作者	Zhang, Jun
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650216, People's Republic of China 2.School of Physics and Optoelectronics Engineering, Anhui University, Hefei 230601, People's Republic of China; zjun@ahu.edu.cn;
推荐引用方式 GB/T 7714	Fang, Yue,Zhang, Jun,Bi Y,et al. Dynamics of Threads Wrapping a Filamentʼs Leg Prior to the Eruption on 2021 October 28[J]. ASTROPHYSICAL JOURNAL,2023,955(2).
APA	Fang, Yue,Zhang, Jun,Bi Y,&Song, Zhiping.(2023).Dynamics of Threads Wrapping a Filamentʼs Leg Prior to the Eruption on 2021 October 28.ASTROPHYSICAL JOURNAL,955(2).
MLA	Fang, Yue,et al."Dynamics of Threads Wrapping a Filamentʼs Leg Prior to the Eruption on 2021 October 28".ASTROPHYSICAL JOURNAL 955.2(2023).