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The Formation of a Small-Scale Filament After Flux Emergence on the Quiet Sun
Chen HC(陈何超)1,2,3; Yang JY(杨家艳)1,2; Yang B(杨波)1,2; Ji KF(季凯帆)1,2; Bi Y(毕以)1,2,3
Source PublicationSOLAR PHYSICS
2018-06-01
Volume293Issue:6Pages:17
DOI10.1007/s11207-018-1311-8
Contribution Rank第1完成单位
Indexed BySCI
KeywordProminences, Formation And Evolution Magnetic Fields, Photosphere Velocity Fields, Photosphere Helicity, Magnetic
Abstract

We present observations of the formation process of a small-scale filament on the quiet Sun during 5 - 6 February 2016 and investigate its formation cause. Initially, a small dipole emerged, and its associated arch filament system was found to reconnect with overlying coronal fields accompanied by numerous extreme ultraviolet bright points. When the bright points faded, many elongated dark threads formed and bridged the positive magnetic element of the dipole and the external negative network fields. Interestingly, an anticlockwise photospheric rotational motion (PRM) set in within the positive endpoint region of the newborn dark threads following the flux emergence and lasted for more than 10 hours. Under the drive of the PRM, these dispersive dark threads gradually aligned along the north-south direction and finally coalesced into an inverse S-shaped filament. Consistent with the dextral chirality of the filament, magnetic helicity calculations show that an amount of negative helicity was persistently injected from the rotational positive magnetic element and accumulated during the formation of the filament. These observations suggest that twisted emerging fields may lead to the formation of the filament via reconnection with pre-existing fields and release of its inner magnetic twist. The persistent PRM might trace a covert twist relaxation from below the photosphere to the low corona.

Funding ProjectNatural Science Foundation of China[11703084] ; Natural Science Foundation of China[11633008] ; Natural Science Foundation of China[11333007] ; Natural Science Foundation of China[11573012] ; Natural Science Foundation of China[11503081] ; CAS program "Light of West China" ; CAS program[QYZDJ-SSW-SLH012] ; Project of the Group for Innovation of Yunnan Province
Funding OrganizationNatural Science Foundation of China[11703084, 11633008, 11333007, 11573012, 11503081] ; CAS program "Light of West China" ; CAS program[QYZDJ-SSW-SLH012] ; Project of the Group for Innovation of Yunnan Province
Language英语
Subject Area天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherSPRINGER
Publication PlaceVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN0038-0938
URL查看原文
WOS IDWOS:000435901200002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMagnetic Induction Equation ; Prominence Formation ; Solar Prominences ; Helicity ; Sunspot ; Rope ; Eruption ; Fields ; Flare ; Tube
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12408
Collection抚仙湖太阳观测站
Corresponding AuthorChen HC(陈何超)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
3.University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing, 100049, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Chen HC,Yang JY,Yang B,et al. The Formation of a Small-Scale Filament After Flux Emergence on the Quiet Sun[J]. SOLAR PHYSICS,2018,293(6):17.
APA Chen HC,Yang JY,Yang B,Ji KF,&Bi Y.(2018).The Formation of a Small-Scale Filament After Flux Emergence on the Quiet Sun.SOLAR PHYSICS,293(6),17.
MLA Chen HC,et al."The Formation of a Small-Scale Filament After Flux Emergence on the Quiet Sun".SOLAR PHYSICS 293.6(2018):17.
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