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Statistical Study of the Kinetic Features of Supra-arcade Downflows Detected from Multiple Solar Flares
Xie XY(谢小妍)1,2,3; Reeves, Katharine K.2; Shen, Chengcai2; Ingram, Joshua D.2,4
发表期刊ASTROPHYSICAL JOURNAL
2022-07-01
卷号933期号:1
DOI10.3847/1538-4357/ac695d
产权排序第1完成单位
收录类别SCI
摘要

We have developed a tracking algorithm to determine the speeds of supra-arcade downflows (SADs) and set up a system to automatically track SADs and measure some interesting parameters. By conducting an analysis of six flares observed by the Atmospheric Imaging Assembly on the Solar Dynamics Observatory, we detect more smaller and slower SADs than prior work, due to the higher spatial resolution of our observational data. The inclusion of these events with smaller and slower SADs directly results in lower median velocities and widths than in prior work, but the fitted distributions and evolutions of the parameters still show good consistency with prior work. The observed distributions of the widths, speeds, and lifetimes of SADs are consistent with log-normal distributions, indicating that random and unstable processes are responsible for generating SADs during solar eruptions. Also, we find that the fastest SADs occur at approximately the middle of the height ranges. The number of SADs in each image versus time shows that there are rest phases of SADs, when few SADs are seen. These findings support the idea that SADs originate from a fluid instability. We compare our results with a numerical simulation that generates SADs using a mixture of the Rayleigh-Taylor instability and the Richtmyer-Meshkov instability, and find that the simulation generates quantities that are consistent with our observational results.

资助项目China Scholarship Council ; Chinese Academy of Sciences (CAS)[XDA17040507] ; Chinese Academy of Sciences (CAS)[QYZDJ-SSWSLH012] ; NSFC[11933009] ; Group for Innovation of Yunnan Province[2018HC023] ; Applied Basic Research of Yunnan Province[2019FB005] ; NSF[AST-2108438] ; NSF[AGS-1923365] ; NSF-REU Solar Physics Program at SAO[AGS-1850750] ; Chandra grants[AR9-20004X] ; Chandra grants[AR6-17003X]
项目资助者China Scholarship Council ; Chinese Academy of Sciences (CAS)[XDA17040507, QYZDJ-SSWSLH012] ; NSFC[11933009] ; Group for Innovation of Yunnan Province[2018HC023] ; Applied Basic Research of Yunnan Province[2019FB005] ; NSF[AST-2108438, AGS-1923365] ; NSF-REU Solar Physics Program at SAO[AGS-1850750] ; Chandra grants[AR9-20004X, AR6-17003X]
语种英语
学科领域天文学 ; 太阳与太阳系 ; 太阳物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP Publishing Ltd
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000817746600001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MAGNETIC RECONNECTION ; CURRENT SHEET ; MAXIMUM-LIKELIHOOD ; MOTIONS
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/25234
专题太阳物理研究组
通讯作者Xie XY(谢小妍)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, People's Republic of China; xiaoyan.xie@cfa.harvard.edu;
2.Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA;
3.University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People's Republic of China;
4.New College of Florida, 5800 Bay Shore Rd, Sarasota, FL 34243, USA
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
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Xie XY,Reeves, Katharine K.,Shen, Chengcai,et al. Statistical Study of the Kinetic Features of Supra-arcade Downflows Detected from Multiple Solar Flares[J]. ASTROPHYSICAL JOURNAL,2022,933(1).
APA Xie XY,Reeves, Katharine K.,Shen, Chengcai,&Ingram, Joshua D..(2022).Statistical Study of the Kinetic Features of Supra-arcade Downflows Detected from Multiple Solar Flares.ASTROPHYSICAL JOURNAL,933(1).
MLA Xie XY,et al."Statistical Study of the Kinetic Features of Supra-arcade Downflows Detected from Multiple Solar Flares".ASTROPHYSICAL JOURNAL 933.1(2022).
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