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Two Kinds of Dynamic Behavior in a Quiescent Prominence Observed by the NVST
Li, Dong1,2,3; Shen YD(申远灯)2,4; Ning, Zongjun1; Zhang, Qingmin1,3; Zhou, Tuanhui1
发表期刊ASTROPHYSICAL JOURNAL
2018-08-20
卷号863期号:2页码:11
DOI10.3847/1538-4357/aad33f
产权排序第4完成单位
收录类别SCI
关键词Instabilities Magnetohydrodynamics (Mhd) Sun: Chromosphere Sun: Filaments, Prominences Sun: Oscillations
摘要

We present high-resolution observations of two kinds of dynamic behavior in a quiescent prominence using the New Vacuum Solar Telescope, i.e., Kelvin-Helmholtz instabilities (KHIs) and small-scale oscillations. The KHIs were identified as rapidly developed vortex-like structures with counterclockwise/clockwise rotations in the Ha red-wing images at +0.3 angstrom, which were produced by the strong shear-flow motions on the surface/interface of prominence plumes. The KHI growth rates are estimated to be similar to 0.0135 +/- 0.0004 and similar to 0.0138 +/- 0.0004. Our observational results further suggest that the shear velocities (i.e., supersonic) of the mass flows are fast enough to produce the strong deformation of the boundary and overcome the restraining surface tension force. This flowdriven instability might play a significant role in the process of plasma transfer in solar prominences. The smallscale oscillations perpendicular to the prominence threads are observed in the Ha line-center images. The oscillatory periods changed nonmonotonically and showed two changing patterns, in which one first decreased slowly and then started to increase, while the other grew fast at the beginning and then started to decrease. Both of these thread oscillations with changing periods were observed to be unstable for an entire cycle, and they were local in nature. All our findings indicate that the small-scale thread oscillations could be magnetohydrodynamic waves in the solar corona.

资助项目NSFC[11603077] ; NSFC[11573072] ; NSFC[11773079] ; NSFC[11773068] ; NSFC[11790302] ; NSFC[11790300] ; NSFC[11729301] ; NSFC[11333009] ; CRP[KLSA201708] ; Youth Fund of Jiangsu[BK20161095] ; Youth Fund of Jiangsu[BK20171108] ; National Natural Science Foundation of China[U1731241] ; Strategic Priority Research Program on Space Science, CAS[XDA15052200] ; Strategic Priority Research Program on Space Science, CAS[XDA15320301] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2014047] ; Specialized Research Fund for State Key Laboratories ; ISSI-BJ
项目资助者NSFC[11603077, 11573072, 11773079, 11773068, 11790302, 11790300, 11729301, 11333009] ; CRP[KLSA201708] ; Youth Fund of Jiangsu[BK20161095, BK20171108] ; National Natural Science Foundation of China[U1731241] ; Strategic Priority Research Program on Space Science, CAS[XDA15052200], XDA15320301] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2014047] ; Specialized Research Fund for State Key Laboratories ; ISSI-BJ
语种英语
学科领域天文学
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:000442628400028
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Kelvin-helmholtz Instability ; Vacuum Solar Telescope ; High-resolution ; Filament Eruptions ; Fine-structures ; Oscillations ; Threads ; Waves ; Hinode/sot ; Motion
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17836
专题选址与日冕观测组
通讯作者Li, Dong; Shen YD(申远灯)
作者单位1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, CAS, Nanjing 210034, People's Republic of China
2.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
3.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Beijing 100012, People's Republic of China
4.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, People's Republic of China
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GB/T 7714
Li, Dong,Shen YD,Ning, Zongjun,et al. Two Kinds of Dynamic Behavior in a Quiescent Prominence Observed by the NVST[J]. ASTROPHYSICAL JOURNAL,2018,863(2):11.
APA Li, Dong,Shen YD,Ning, Zongjun,Zhang, Qingmin,&Zhou, Tuanhui.(2018).Two Kinds of Dynamic Behavior in a Quiescent Prominence Observed by the NVST.ASTROPHYSICAL JOURNAL,863(2),11.
MLA Li, Dong,et al."Two Kinds of Dynamic Behavior in a Quiescent Prominence Observed by the NVST".ASTROPHYSICAL JOURNAL 863.2(2018):11.
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