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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
Source PublicationASTROPHYSICAL JOURNAL
2021-02-01
Volume908Issue:2Pages:13
DOI10.3847/1538-4357/abd47e
Contribution Rank第5完成单位
Indexed BySCI
KeywordSolar magnetic reconnection Plasma physics Solar corona Solar ultraviolet emission Solar magnetic fields
Abstract

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.

Funding ProjectStrategic 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]
Funding OrganizationStrategic 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]
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:000624499600001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/24192
Collection抚仙湖太阳观测和研究基地
Corresponding AuthorLi, Leping
Affiliation1.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
Recommended Citation
GB/T 7714
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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