The Role of Turbulence for Heating Plasmas in Eruptive Solar Flares | |
Ye J(叶景)4,5; Cai QW(蔡强伟)3,4,5; Shen, Chengcai1; Raymond, John C.1; Lin J(林隽)3,4,5; Roussev, Ilia I.2,5; Mei ZX(梅志星)4,5 | |
刊名 | ASTROPHYSICAL JOURNAL |
2020-07-01 | |
卷号 | 897期号:1页码:14 |
关键词 | Solar magnetic reconnection Magnetohydrodynamical simulations Solar flares Termination shock |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ab93b5 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Magnetohydrodynamic turbulence is ubiquitous in the process of solar eruptions, and it is crucial for the fast release of energy and the formation of complex thermal structures that have been found in observations. In this paper, we focus on the turbulence in two specific regions: inside the current sheet (CS) and above the flare loops, considering the standard flare model. The gravitationally stratified solar atmosphere is used in MHD simulations, which include the Lundquist number ofS = 10(6), thermal conduction, and radiative cooling. The numerical results are generally consistent with previous simulation work, especially the thermal structures and reconnection rate in flare phases. We can observe the formation of multiple termination shocks (TSs) as well as plasmoid collisions, which make the region above the loop-top more turbulent and heat plasmas to the higher temperature. The spectrum studies show that the property of the MHD turbulence inside the CS is anisotropic, while it is quasi-isotropic above the loop-top. The magnetic spectrum becomes softer when the plasmoids interact with the multiple TSs. Meanwhile, synthetic images and light curves of the Solar Dynamics Observatory/Atmospheric Imaging Assembly 94, 131, 171, 304, and 193 A channels show intermittent radiation enhancement by turbulence above the loop-top. The spectrum study of the radiation intensity in these five wavelengths gives quite different power indices at the same time. In particular, quasiperiodic pulsations (QPPs) in the turbulent region above the loop-top are investigated, and we also confirm that the heating for plasmas via turbulence is an important contributor to the source of QPPs. |
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 | Strategic Priority Research Program of CAS[XDA17040507] ; NSFC[11603070] ; NSFC[11933009] ; CAS[QYZDJ-SSWSLH012] ; CAS[XDA15010900] ; project of the Group for Innovation of Yunnan Province[2018HC023] ; Yunnan Province Yunling Scholar Project |
WOS关键词 | UNSPLIT GODUNOV METHOD ; MAGNETIC RECONNECTION ; CURRENT SHEET ; IDEAL MHD ; ACCELERATION ; MODEL ; SHOCK ; TOP |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000548351600001 |
资助机构 | Strategic Priority Research Program of CAS[XDA17040507] ; NSFC[11603070, 11933009] ; CAS[QYZDJ-SSWSLH012, XDA15010900] ; project of the Group for Innovation of Yunnan Province[2018HC023] ; Yunnan Province Yunling Scholar Project |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/23547] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Ye J(叶景) |
作者单位 | 1.Smithsonian Astrophysical Observatory, 60 Garden Street, MS 15, Cambridge, MA 02138, USA 2.Centre for Mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven, Celestijnenlaan 200B, B-3001 Leuven, Belgium 3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 5.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, People's Republic of China |
推荐引用方式 GB/T 7714 | Ye J,Cai QW,Shen, Chengcai,et al. The Role of Turbulence for Heating Plasmas in Eruptive Solar Flares[J]. ASTROPHYSICAL JOURNAL,2020,897(1):14. |
APA | Ye J.,Cai QW.,Shen, Chengcai.,Raymond, John C..,Lin J.,...&Mei ZX.(2020).The Role of Turbulence for Heating Plasmas in Eruptive Solar Flares.ASTROPHYSICAL JOURNAL,897(1),14. |
MLA | Ye J,et al."The Role of Turbulence for Heating Plasmas in Eruptive Solar Flares".ASTROPHYSICAL JOURNAL 897.1(2020):14. |
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