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Magnetic Reconnection between Loops Accelerated By a Nearby Filament Eruption
Li, Leping1,2; Peter, Hardi3; Chitta, Lakshmi Pradeep3; Song, Hongqiang4; Ji KF(季凯帆)5; Xiang YY(向永源)5
发表期刊ASTROPHYSICAL JOURNAL
2021-02-01
卷号908期号:2页码:13
DOI10.3847/1538-4357/abd47e
产权排序第5完成单位
收录类别SCI
关键词Solar magnetic reconnection Plasma physics Solar corona Solar ultraviolet emission Solar magnetic fields
摘要

Magnetic reconnection modulated by nonlocal disturbances in the solar atmosphere has been investigated theoretically, but rarely observed. In this study, employing H alpha and extreme ultraviolet (EUV) images and line-of-sight magnetograms, we report the acceleration of reconnection by an adjacent filament eruption. In H alpha images, four groups of chromospheric fibrils are observed to form a saddle-like structure. Among them, two groups of fibrils converge and reconnect. Two newly reconnected fibrils then form and retract away from the reconnection region. In EUV images, similar structures and evolution of coronal loops are identified. The current sheet forms repeatedly at the interface of reconnecting loops, with a width and length of 1-2 and 5.3-7.2 Mm and a reconnection rate of 0.18-0.3. It appears in the EUV low-temperature channels, with an average differential emission measure (DEM) weighed temperature and EM of 2 MK and 2.5 x 10(27) cm(-5). Plasmoids appear in the current sheet and propagate along it, and then further along the reconnection loops. The filament, located to the southeast of the reconnection region, erupts and pushes away the loops covering the reconnection region. Thereafter, the current sheet has a width and length of 2 and 3.5 Mm and a reconnection rate of 0.57. It becomes much brighter and appears in the EUV high-temperature channels, with an average DEM-weighed temperature and EM of 5.5 MK and 1.7 x 10(28) cm(-5). In the current sheet, more hotter plasmoids form. More thermal and kinetic energy is hence converted. These results suggest that the reconnection is significantly accelerated by the propagating disturbance caused by the nearby filament eruption.

资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; National Natural Science Foundations of China[12073042] ; National Natural Science Foundations of China[11790304] ; National Natural Science Foundations of China[11873059] ; National Natural Science Foundations of China[11773039] ; Key Research Program of Frontier Sciences[ZDBS-LY-SLH013] ; Chinese Academy of Sciences[QYZDJ-SSW-SLH050] ; National Natural Science Foundation of China[U2031109]
项目资助者Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; National Natural Science Foundations of China[12073042, 11790304, 11873059, 11773039] ; Key Research Program of Frontier Sciences[ZDBS-LY-SLH013] ; Chinese Academy of Sciences[QYZDJ-SSW-SLH050] ; National Natural Science Foundation of China[U2031109]
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:000624499600001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
引用统计
被引频次:6[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/114a53/24192
专题天文技术实验室
抚仙湖太阳观测和研究基地
通讯作者Li, Leping
作者单位1.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.Max Planck Institute for Solar System Research, D-37077 Göttingen, Germany
4.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, and Institute of Space Sciences, Shandong University, Weihai, Shandong 264209, People's Republic of China
5.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, People's Republic of China
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Li, Leping,Peter, Hardi,Chitta, Lakshmi Pradeep,et al. Magnetic Reconnection between Loops Accelerated By a Nearby Filament Eruption[J]. ASTROPHYSICAL JOURNAL,2021,908(2):13.
APA Li, Leping,Peter, Hardi,Chitta, Lakshmi Pradeep,Song, Hongqiang,Ji KF,&Xiang YY.(2021).Magnetic Reconnection between Loops Accelerated By a Nearby Filament Eruption.ASTROPHYSICAL JOURNAL,908(2),13.
MLA Li, Leping,et al."Magnetic Reconnection between Loops Accelerated By a Nearby Filament Eruption".ASTROPHYSICAL JOURNAL 908.2(2021):13.
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