Multilayered Kelvin-Helmholtz Instability in the Solar Corona
文献类型：期刊论文
| 作者 | Yuan, Ding1,2; Shen, Yuandeng3; Liu, Yu3; Li, Hongbo4; Feng, Xueshang1; Keppens, Rony5,6,7 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2019-10-20 |
| 卷号 | 884期号:2页码:5 |
| ISSN号 | 2041-8205 |
| 关键词 | magnetohydrodynamics (MHD) Sun: atmosphere Sun: corona |
| DOI | 10.3847/2041-8213/ab4bcd |
| 英文摘要 | The Kelvin-Helmholtz (KH) instability is commonly found in many astrophysical, laboratory, and space plasmas. It could mix plasma components of different properties and convert dynamic fluid energy from large-scale structure to smaller ones. In this study, we combined the ground-based New Vacuum Solar Telescope (NVST) and the Solar Dynamic Observatories/Atmospheric Imaging Assembly (AIA) to observe the plasma dynamics associated with active region 12673 on 2017 September 9. In this multitemperature view, we identified three adjacent layers of plasma flowing at different speeds, and detected KH instabilities at their interfaces. We could unambiguously track a typical KH vortex and measure its motion. We found that the speed of this vortex suddenly tripled at a certain stage. This acceleration was synchronized with the enhancements in emission measure and average intensity of the 193 A data. We interpret this as evidence that KH instability triggers plasma heating. The intriguing feature in this event is that the KH instability observed in the NVST channel was nearly complementary to that in the AIA 193 A. Such a multithermal energy exchange process is easily overlooked in previous studies, as the cold plasma component is usually not visible in the extreme-ultraviolet channels that are only sensitive to high-temperature plasma emissions. Our finding indicates that embedded cold layers could interact with hot plasma as invisible matters. We speculate that this process could occur at a variety of length scales and could contribute to plasma heating. |
| WOS关键词 | PLASMA |
| 资助项目 | National Natural Science Foundation of China (NSFC)[11803005] ; Shenzhen Technology Project[JCYJ20180306172239618] ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China[KLSA201814] ; NSFC[11533009] ; NSFC[11773068] ; NSFC[11633008] ; NSFC[11922307] ; Yunnan Science Foundation[2017FB006] ; joint FWO-NSFC grant[G0E9619N] ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme[833251 PROMINENT ERC-ADG 2018] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000516538200024 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Shenzhen Technology Project ; Shenzhen Technology Project ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; NSFC ; NSFC ; Yunnan Science Foundation ; Yunnan Science Foundation ; joint FWO-NSFC grant ; joint FWO-NSFC grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Shenzhen Technology Project ; Shenzhen Technology Project ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; NSFC ; NSFC ; Yunnan Science Foundation ; Yunnan Science Foundation ; joint FWO-NSFC grant ; joint FWO-NSFC grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Shenzhen Technology Project ; Shenzhen Technology Project ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; NSFC ; NSFC ; Yunnan Science Foundation ; Yunnan Science Foundation ; joint FWO-NSFC grant ; joint FWO-NSFC grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Shenzhen Technology Project ; Shenzhen Technology Project ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; Open Research Program of Key Laboratory of Solar Activity of National Astronomical Observatory of China ; NSFC ; NSFC ; Yunnan Science Foundation ; Yunnan Science Foundation ; joint FWO-NSFC grant ; joint FWO-NSFC grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55585]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Yuan, Ding |
| 作者单位 | 1.Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen 518055, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China 4.Luoyang Normal Univ, Inst Space Phys, Luoyang 471934, Peoples R China 5.Katholieke Univ Leuven, Dept Math, Ctr Math Plasma Astrophys, Celestijnenlaan 200B, B-3001 Leuven, Belgium 6.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China 7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Ding,Shen, Yuandeng,Liu, Yu,et al. Multilayered Kelvin-Helmholtz Instability in the Solar Corona[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,884(2):5. |
| APA | Yuan, Ding,Shen, Yuandeng,Liu, Yu,Li, Hongbo,Feng, Xueshang,&Keppens, Rony.(2019).Multilayered Kelvin-Helmholtz Instability in the Solar Corona.ASTROPHYSICAL JOURNAL LETTERS,884(2),5. |
| MLA | Yuan, Ding,et al."Multilayered Kelvin-Helmholtz Instability in the Solar Corona".ASTROPHYSICAL JOURNAL LETTERS 884.2(2019):5. |
入库方式： OAI收割
来源：国家天文台
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