Multilayered Kelvin-Helmholtz Instability in the Solar Corona
Yuan, Ding1,2; Shen, Yuandeng3; Liu, Yu3; Li, Hongbo4; Feng, Xueshang1; Keppens, Rony5,6,7
Corresponding AuthorYuan, Ding(
AbstractThe 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.
Keywordmagnetohydrodynamics (MHD) Sun: atmosphere Sun: corona
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000516538200024
Citation statistics
Document Type期刊论文
Corresponding AuthorYuan, Ding
Affiliation1.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
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yuan, Ding]'s Articles
[Shen, Yuandeng]'s Articles
[Liu, Yu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yuan, Ding]'s Articles
[Shen, Yuandeng]'s Articles
[Liu, Yu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yuan, Ding]'s Articles
[Shen, Yuandeng]'s Articles
[Liu, Yu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.