中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Dynamics of Descending Knots in a Solar Prominence and Their Possible Contributions to the Heating of the Local Corona

文献类型:期刊论文

AuthorBi Y(毕以)1,2,3; Yang B(杨波)1,3; Li, Ting2,4; Dong Y(董燕)1,3; Ji KF(季凯帆)1,3
SourceASTROPHYSICAL JOURNAL LETTERS
Issued Date2020-03-10
Volume891Issue:2Pages:10
KeywordThe Sun Solar prominences Solar chromosphere Solar coronal heating Solar corona Solar filaments Solar magnetic fields Solar physics
ISSN2041-8205
DOI10.3847/2041-8213/ab79a2
Rank第1完成单位
Corresponding AuthorBi, Yi(biyi@ynao.ac.cn)
SubtypeArticle
English AbstractThe knots in solar prominences are often observed to fall with nearly constant velocity, but the associated physical mechanism is currently not well understood. In this Letter, we present a prominence observed by the New Vacuum Solar Telescope in H-alpha wavelength. Knots that rose within the prominence appear to have been preferentially located at higher altitude, whereas those that fell were found throughout the entire prominence structure. The descending speed of the knots near the solar surface was higher than that far away from the solar surface. We noted that the knots near the solar surface may run along a set of coronal loops observed from the Atmospheric Imaging Assembly. Elsewhere, the majority of knots are interpreted to have descended across more horizontal magnetic fields with a nearly constant speed. This lack of acceleration indicates that the liberated gravitational potential energy may not manifest as an increase in kinetic energy. Assuming instead that the descending knots were capable of exciting Alfven waves that could then dissipate within the local corona, the gravitational potential energy of the knots may have been converted into thermal energy. Assuming a perfectly elastic system, we therefore estimate that the gravitational energy loss rate of these observed knots amounts to 1/2000 of that required to heat the entire quiet Sun, increasing to 1/320 when considering possibly further downward motions of the knots having disappeared in the H-alpha observations. This result suggests such a mechanism may contribute to the heating of the corona local to these prominences.
Subject天文学 ; 太阳与太阳系 ; 太阳物理学
URL查看原文
Publish PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Funding ProjectNatural Science Foundation of China[11633008] ; Natural Science Foundation of China[11773072] ; Natural Science Foundation of China[11873027] ; Natural Science Foundation of China[11933009] ; Natural Science Foundation of China[11773039] ; Natural Science Foundation of China[11703084] ; Natural Science Foundation of China[11763004] ; Natural Science Foundation of China[11873088] ; Natural Science Foundation of China[U1831210] ; Young Elite Scientists Sponsorship Program by CAST ; National Key Research and Development Program of China[2019YFA0405000] ; CAS[QYZDJ-SSW-SLH012] ; Group for Innovation of Yunnan Province ; Key Laboratory of Solar Activity of Chinese Academy of Sciences[KLSA201710]
WOS KeywordVERTICAL THREADS ; ENERGY ; EVOLUTION ; FLOWS
WOS Research AreaAstronomy & Astrophysics
Language英语
PublisherIOP PUBLISHING LTD
WOS IDWOS:000521425000001
Funding OrganizationNatural Science Foundation of China[11633008, 11773072, 11873027, 11933009, 11773039, 11703084, 11763004, 11873088, U1831210] ; Young Elite Scientists Sponsorship Program by CAST ; National Key Research and Development Program of China[2019YFA0405000] ; CAS[QYZDJ-SSW-SLH012] ; Group for Innovation of Yunnan Province ; Key Laboratory of Solar Activity of Chinese Academy of Sciences[KLSA201710]
源URL[http://ir.ynao.ac.cn/handle/114a53/22575]  
Collection云南天文台_太阳物理研究组
Corresponding AuthorBi Y(毕以)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, People's Republic of China
2.Key Laboratory of Solar Activity, National Astronomical Observatories of Chinese Academy of Science, Beijing 100012, People's Republic of China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Recommended Citation
GB/T 7714
Bi Y,Yang B,Li, Ting,et al. Dynamics of Descending Knots in a Solar Prominence and Their Possible Contributions to the Heating of the Local Corona[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,891(2):10.
APA Bi Y,Yang B,Li, Ting,Dong Y,&Ji KF.(2020).Dynamics of Descending Knots in a Solar Prominence and Their Possible Contributions to the Heating of the Local Corona.ASTROPHYSICAL JOURNAL LETTERS,891(2),10.
MLA Bi Y,et al."Dynamics of Descending Knots in a Solar Prominence and Their Possible Contributions to the Heating of the Local Corona".ASTROPHYSICAL JOURNAL LETTERS 891.2(2020):10.

入库方式: OAI收割

来源:云南天文台

浏览0
下载0
收藏0
其他版本

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