| Dynamics of Descending Knots in a Solar Prominence and Their Possible Contributions to the Heating of the Local Corona | |
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
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| 通讯作者 | Bi, Yi([email protected]) |
| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 2020-03-10 | |
| 卷号 | 891期号:2页码:10 |
| DOI | 10.3847/2041-8213/ab79a2 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | The Sun Solar prominences Solar chromosphere Solar coronal heating Solar corona Solar filaments Solar magnetic fields Solar physics |
| 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. |
| 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] |
| 项目资助者 | 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] |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 太阳与太阳系 ; 太阳物理学 |
| 文章类型 | Article |
| 出版者 | IOP PUBLISHING LTD |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| WOS记录号 | WOS:000521425000001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | VERTICAL THREADS ; ENERGY ; EVOLUTION ; FLOWS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/22576 |
| 专题 | 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 |
| 第一作者单位 | 中国科学院云南天文台 |
| 通讯作者单位 | 中国科学院云南天文台 |
| 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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| Dynamics of Descendi（3687KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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