Observing Kelvin-Helmholtz instability in solar blowout jet

doi:10.1038/s41598-018-26581-4

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	Observing Kelvin-Helmholtz instability in solar blowout jet
	Li, Xiaohong 1,2; Zhang, Jun 1,2; Yang, Shuhong 1,2; Hou, Yijun 1,2; Erdelyi, Robert 3,4
刊名	SCIENTIFIC REPORTS
	2018-05-25
卷号	8 页码:9
ISSN号	2045-2322
DOI	10.1038/s41598-018-26581-4
英文摘要	Kelvin-Helmholtz instability (KHI) is a basic physical process in fluids and magnetized plasmas, with applications successfully modelling e.g. exponentially growing instabilities observed at magnetospheric and heliospheric boundaries, in the solar or Earth's atmosphere and within astrophysical jets. Here, we report the discovery of the KHI in solar blowout jets and analyse the detailed evolution by employing high-resolution data from the Interface Region Imaging Spectrograph ( IRIS) satellite launched in 2013. The particular jet we focus on is rooted in the surrounding penumbra of the main negative polarity sunspot of Active Region 12365, where the main body of the jet is a super-penumbral structure. At its maximum, the jet has a length of 90 Mm, a width of 19.7 Mm, and its density is about 40 times higher than its surroundings. During the evolution of the jet, a cavity appears near the base of the jet, and bi-directional flows originated from the top and bottom of the cavity start to develop, indicating that magnetic reconnection takes place around the cavity. Two upward flows pass along the left boundary of the jet successively. Next, KHI develops due to a strong velocity shear (similar to 204 km s(-1)) between these two flows, and subsequently the smooth left boundary exhibits a sawtooth pattern, evidencing the onset of the instability.
资助项目	National Natural Science Foundations of China[11533008] ; National Natural Science Foundations of China[11790304] ; National Natural Science Foundations of China[11673035] ; National Natural Science Foundations of China[11773039] ; National Natural Science Foundations of China[11673034] ; National Natural Science Foundations of China[11790300] ; Key Programs of the Chinese Academy of Sciences[QYZDJ-SSW-SLH050] ; Youth Innovation Promotion Association of CAS[2014043] ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; STFC (UK)[ST/M000826/1] ; Royal Society ; Chinese Academy of Sciences Presidents International Fellowship Initiative[2016VMA045]
WOS关键词	X-RAY JETS ; H-ALPHA SURGES ; ALFVEN WAVES ; MAGNETIC RECONNECTION ; RESONANT ABSORPTION ; HINODE OBSERVATIONS ; CORONAL HOLES ; PLASMA ; MAGNETOPAUSE ; STABILITY
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000433061300018
资助机构	National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Programs of the Chinese Academy of Sciences ; Key Programs of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; STFC (UK) ; STFC (UK) ; Royal Society ; Royal Society ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Programs of the Chinese Academy of Sciences ; Key Programs of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; STFC (UK) ; STFC (UK) ; Royal Society ; Royal Society ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Programs of the Chinese Academy of Sciences ; Key Programs of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; STFC (UK) ; STFC (UK) ; Royal Society ; Royal Society ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Programs of the Chinese Academy of Sciences ; Key Programs of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through an ESA PRODEX contract ; STFC (UK) ; STFC (UK) ; Royal Society ; Royal Society ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; Chinese Academy of Sciences Presidents International Fellowship Initiative
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/21669]
专题	中国科学院国家天文台
通讯作者	Li, Xiaohong; Zhang, Jun
作者单位	1.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Univ Sheffield, Sch Math & Stat, Solar Phys & Space Plasma Res Ctr, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England 4.Eotvos Lorand Univ, Dept Astron, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary
推荐引用方式 GB/T 7714	Li, Xiaohong,Zhang, Jun,Yang, Shuhong,et al. Observing Kelvin-Helmholtz instability in solar blowout jet[J]. SCIENTIFIC REPORTS,2018,8:9.
APA	Li, Xiaohong,Zhang, Jun,Yang, Shuhong,Hou, Yijun,&Erdelyi, Robert.(2018).Observing Kelvin-Helmholtz instability in solar blowout jet.SCIENTIFIC REPORTS,8,9.
MLA	Li, Xiaohong,et al."Observing Kelvin-Helmholtz instability in solar blowout jet".SCIENTIFIC REPORTS 8(2018):9.