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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

作者Bi 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
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2020-03-10
卷号891期号:2页码:10
ISSN号2041-8205
关键词The Sun Solar prominences Solar chromosphere Solar coronal heating Solar corona Solar filaments Solar magnetic fields Solar physics
DOI10.3847/2041-8213/ab79a2
通讯作者Bi, Yi(biyi@ynao.ac.cn)
产权排序第1完成单位
文献子类Article
英文摘要The 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.
学科主题天文学 ; 太阳与太阳系 ; 太阳物理学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词VERTICAL THREADS ; ENERGY ; EVOLUTION ; FLOWS
资助项目Natural 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研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000521425000001
资助机构Natural 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]  
专题云南天文台_太阳物理研究组
通讯作者Bi Y(毕以)
作者单位1.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
推荐引用方式
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.

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来源：云南天文台

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