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The Role of Turbulence for Heating Plasmas in Eruptive Solar Flares
Ye J(叶景)1,2; Cai QW(蔡强伟)1,2,3; Shen, Chengcai4; Raymond, John C.4; Lin J(林隽)1,2,3; Roussev, Ilia I.1,5; Mei ZX(梅志星)1,2
Source PublicationASTROPHYSICAL JOURNAL
2020-07-01
Volume897Issue:1Pages:14
DOI10.3847/1538-4357/ab93b5
Contribution Rank第1完成单位
Indexed BySCI
KeywordSolar 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 ProjectStrategic 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 OrganizationStrategic 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
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000548351600001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordUNSPLIT GODUNOV METHOD ; MAGNETIC RECONNECTION ; CURRENT SHEET ; IDEAL MHD ; ACCELERATION ; MODEL ; SHOCK ; TOP
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23548
Collection太阳物理研究组
Corresponding AuthorYe J(叶景)
Affiliation1.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 AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan 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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