Statistical Study of the Kinetic Features of Supra-arcade Downflows Detected from Multiple Solar Flares
文献类型:期刊论文
作者 | Xie XY(谢小妍)2,3,4; Reeves, Katharine K.3; Shen, Chengcai3; Ingram, Joshua D.1,3 |
刊名 | ASTROPHYSICAL JOURNAL |
出版日期 | 2022-07-01 |
卷号 | 933期号:1 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac695d |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | 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. |
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 | MAGNETIC RECONNECTION ; CURRENT SHEET ; MAXIMUM-LIKELIHOOD ; MOTIONS |
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] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000817746600001 |
资助机构 | 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] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25234] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Xie XY(谢小妍) |
作者单位 | 1.New College of Florida, 5800 Bay Shore Rd, Sarasota, FL 34243, USA 2.University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People's Republic of China; 3.Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA; 4.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, People's Republic of China; xiaoyan.xie@cfa.harvard.edu; |
推荐引用方式 GB/T 7714 | 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). |
入库方式: OAI收割
来源:云南天文台
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