The Role of Turbulence for Heating Plasmas in Eruptive Solar Flares | |
Ye J(叶景)1,2![]() ![]() ![]() ![]() ![]() | |
Source Publication | ASTROPHYSICAL JOURNAL
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2020-07-01 | |
Volume | 897Issue:1Pages:14 |
DOI | 10.3847/1538-4357/ab93b5 |
Contribution Rank | 第1完成单位 |
Indexed By | SCI |
Keyword | Solar magnetic reconnection Magnetohydrodynamical simulations Solar flares Termination shock |
Abstract | 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. |
Funding Project | 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 |
Funding Organization | 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 |
Language | 英语 |
Subject Area | 天文学 ; 太阳与太阳系 ; 太阳物理学 |
MOST Discipline Catalogue | 理学 ; 理学::天文学 |
Subtype | Article |
Publisher | IOP PUBLISHING LTD |
Publication Place | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
ISSN | 0004-637X |
URL | 查看原文 |
WOS ID | WOS:000548351600001 |
WOS Research Area | Astronomy & Astrophysics |
WOS Subject | Astronomy & Astrophysics |
WOS Keyword | UNSPLIT GODUNOV METHOD ; MAGNETIC RECONNECTION ; CURRENT SHEET ; IDEAL MHD ; ACCELERATION ; MODEL ; SHOCK ; TOP |
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Document Type | 期刊论文 |
Identifier | http://ir.ynao.ac.cn/handle/114a53/23548 |
Collection | 太阳物理研究组 |
Corresponding Author | Ye J(叶景) |
Affiliation | 1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, People's Republic of China 2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 4.Smithsonian Astrophysical Observatory, 60 Garden Street, MS 15, Cambridge, MA 02138, USA 5.Centre for Mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven, Celestijnenlaan 200B, B-3001 Leuven, Belgium |
First Author Affilication | Yunnan Observatories, Chinese Academy of Sciences |
Corresponding Author Affilication | Yunnan Observatories, Chinese Academy of Sciences |
Recommended Citation 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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