Dynamical and Thermal Manifestations of the Region above the Top of the Post-flare Loops: MHD Simulations
文献类型:期刊论文
作者 | Cai, Qiangwei1,2; Feng, Hengqiang1,2; Ye J(叶景)3,4; Shen, Chengcai5 |
刊名 | ASTROPHYSICAL JOURNAL |
出版日期 | 2021-05-01 |
卷号 | 912期号:1页码:17 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/abee27 |
产权排序 | 第3完成单位 |
文献子类 | Article |
英文摘要 | Observations proved that a distributed structure named a supra-arcade fan (SAF) exists above post-flare loops in solar eruptions. The locations of the SAF are spatially consistent with various emission sources. Termination shocks (TSs) that are often regarded as an efficient driver for particle acceleration possibly exist in the SAF. We performed the numerical simulations of solar flares based on the standard flare model to study the dynamical and thermal manifestations of the SAF, as well as the possibility of detecting TSs in extreme-ultraviolet (EUV) images. In the simulations, the SAF and TSs can be clearly identified. The motion history and temperature evolution of plasmas inside the SAF indicate that the mass of the SAF comes from the corona and the plasmas are heated in the current sheet. The height of the SAF decreases with the speed of about 64.6 km s(-1) when the rate of magnetic reconnection quickly increases, and then increases with a slightly lower velocity of about 50.5 km s(-1) after the peak of the rate of magnetic reconnection. The descent-ascent path of the SAF is due to the unbalance of the Lorentz force and the pressure force inside the magnetic loops. In synthetic EUV images, emission intensity variations in the area surrounding TSs are significant, indicating that, depending on the viewing angle, TSs could be identifiable in EUV observations. The results of numerical simulations are generally consistent with observations, helping us to better understand the characteristics of the SAF and the physical natures behind it. |
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 |
资助项目 | Natural Science Foundation of Henan Province[212300410210] ; National Scientific Foundation of China[NSFC 41974197] ; National Scientific Foundation of China[41674170] ; National Scientific Foundation of China[12073073] ; National Scientific Foundation of China[11933009] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000648802300001 |
资助机构 | Natural Science Foundation of Henan Province[212300410210] ; National Scientific Foundation of China[NSFC 41974197, 41674170, 12073073, 11933009] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24301] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Feng, Hengqiang |
作者单位 | 1.Institute of Space Physics, Luoyang Normal University, Luoyang, 471934, People's Republic of China 2.Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang Normal University, Luoyang 471934, People's Republic Of China 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, People's Republic of China 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, People's Republic of China 5.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA |
推荐引用方式 GB/T 7714 | Cai, Qiangwei,Feng, Hengqiang,Ye J,et al. Dynamical and Thermal Manifestations of the Region above the Top of the Post-flare Loops: MHD Simulations[J]. ASTROPHYSICAL JOURNAL,2021,912(1):17. |
APA | Cai, Qiangwei,Feng, Hengqiang,Ye J,&Shen, Chengcai.(2021).Dynamical and Thermal Manifestations of the Region above the Top of the Post-flare Loops: MHD Simulations.ASTROPHYSICAL JOURNAL,912(1),17. |
MLA | Cai, Qiangwei,et al."Dynamical and Thermal Manifestations of the Region above the Top of the Post-flare Loops: MHD Simulations".ASTROPHYSICAL JOURNAL 912.1(2021):17. |
入库方式: OAI收割
来源:云南天文台
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