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题名:
Observation of the Kelvin-Helmholtz Instability in a Solar Prominence
作者: 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
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2018-04-20
卷号: 857, 期号:2
DOI: 10.3847/1538-4357/aab789
学科分类: 天文学
产权排序: 第2完成单位
收录类别: SCI
通讯作者: Yang, Heesu, Email: hsyang@kasi.re.kr
关键词: instabilities ; Sun: chromosphere ; Sun: filaments, prominences
英文摘要: 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.
项目资助者: Korea Astronomy and Space Science Institute(2018185003) ; National Natural Science Foundation of China(11473064)
语种: 英语
原文出处: 查看原文
ISSN号: 0004-637X
文章类型: Article
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: LARGE-AMPLITUDE OSCILLATION ; POLAR CROWN FILAMENT ; CURRENT SHEET ; QUIESCENT PROMINENCES ; RECONNECTION ; TRANSPORT ; EVOLUTION ; BOUNDARY ; MOTION ; WAVES
WOS记录号: WOS:000430745400005
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/12365
Appears in Collections:抚仙湖太阳观测站_期刊论文

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作者单位: 1.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:
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).
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