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Observing Kelvin-Helmholtz instability in solar blowout jet

文献类型：期刊论文

作者Li, Xiaohong1,2; Zhang, Jun1,2; Yang, Shuhong1,2; Hou, Yijun1,2; Erdelyi, Robert3,4
刊名SCIENTIFIC REPORTS
出版日期2018-05-25
卷号8页码:9
ISSN号2045-2322
DOI10.1038/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.
WOS关键词X-RAY JETS ; H-ALPHA SURGES ; ALFVEN WAVES ; MAGNETIC RECONNECTION ; RESONANT ABSORPTION ; HINODE OBSERVATIONS ; CORONAL HOLES ; PLASMA ; MAGNETOPAUSE ; STABILITY
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研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000433061300018
出版者NATURE PUBLISHING GROUP
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
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.

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来源：国家天文台

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