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Observation of the Kelvin-Helmholtz Instability in a Solar Prominence
Yang, Heesu1; Xu Z(徐稚)2; Lim, Eun-Kyung1; Kim, Sujin1,3; Cho, Kyung-Suk1,3; Kim, Yeon-Han1,3; Chae, Jongchul4; Cho, Kyuhyoun4; Ji KF(季凯帆)2
Source PublicationASTROPHYSICAL JOURNAL
2018-04-20
Volume857Issue:2
DOI10.3847/1538-4357/aab789
Contribution Rank第2完成单位
Indexed BySCI
KeywordInstabilities Sun: Chromosphere Sun: Filaments, Prominences
Abstract

Many solar prominences end their lives in eruptions or abrupt disappearances that are associated with dynamical or thermal instabilities. Such instabilities are important because they may be responsible for energy transport and conversion. We present a clear observation of a streaming kink-mode Kelvin-Helmholtz Instability (KHI) taking place in a solar prominence using the H alpha Lyot filter installed at the New Vacuum Solar Telescope, Fuxian-lake Solar Observatory in Yunnan, China. On one side of the prominence, a series of plasma blobs floated up from the chromosphere and streamed parallel to the limb. The plasma stream was accelerated to about 20-60 km s(-1) and then undulated. We found that 2 ''- and 5 ''-size vortices formed, floated along the stream, and then broke up. After the 5 ''-size vortex, a plasma ejection out of the stream was detected in the Solar Dynamics Observatory/Atmospheric Imaging Assembly images. Just before the formation of the 5 ''-size vortex, the stream displayed an oscillatory transverse motion with a period of 255 s with the amplitude growing at the rate of 0.001 s(-1). We attribute this oscillation of the stream and the subsequent formation of the vortex to the KHI triggered by velocity shear between the stream, guided by the magnetic field and the surrounding media. The plasma ejection suggests the transport of prominence material into the upper layer by the KHI in its nonlinear stage.

Funding ProjectKorea Astronomy and Space Science Institute[2018185003] ; National Natural Science Foundation of China[11473064]
Funding OrganizationKorea Astronomy and Space Science Institute[2018185003] ; National Natural Science Foundation of China[11473064]
Language英语
Subject Area天文学 ; 太阳与太阳系
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:000430745400005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLarge-amplitude Oscillation ; Polar Crown Filament ; Current Sheet ; Quiescent Prominences ; Reconnection ; Transport ; Evolution ; Boundary ; Motion ; Waves
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12365
Collection抚仙湖太阳观测站
Corresponding AuthorYang, Heesu
Affiliation1.Korea Astronomy & Space Science Institute, Daejeon 34055, Republic of Korea
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
3.University of Science and Technology, Daejeon, Republic of Korea
4.Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
Recommended Citation
GB/T 7714
Yang, Heesu,Xu Z,Lim, Eun-Kyung,et al. Observation of the Kelvin-Helmholtz Instability in a Solar Prominence[J]. ASTROPHYSICAL JOURNAL,2018,857(2).
APA Yang, Heesu.,Xu Z.,Lim, Eun-Kyung.,Kim, Sujin.,Cho, Kyung-Suk.,...&Ji KF.(2018).Observation of the Kelvin-Helmholtz Instability in a Solar Prominence.ASTROPHYSICAL JOURNAL,857(2).
MLA Yang, Heesu,et al."Observation of the Kelvin-Helmholtz Instability in a Solar Prominence".ASTROPHYSICAL JOURNAL 857.2(2018).
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