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NON-EQUILIBRIUM IONIZATION MODELING OF THE CURRENT SHEET IN A SIMULATED SOLAR ERUPTION
Shen CC(沈呈彩)1,2,3; Reeves, KK1; Raymond, JC1; Murphy, NA1; Ko, YK4; Lin J(林隽)2; Mikic, Z5; Linker, JA5
Source PublicationASTROPHYSICAL JOURNAL
2013-08-20
Volume773Issue:2
DOI10.1088/0004-637X/773/2/110
Contribution Rank第2完成单位
Indexed BySCI
KeywordAtomic Processes Magnetic Reconnection Sun: Coronal Mass Ejections (Cmes) Sun: Uv Radiation
Abstract

The current sheet that extends from the top of flare loops and connects to an associated flux rope is a common structure in models of coronal mass ejections (CMEs). To understand the observational properties of CME current sheets, we generated predictions from a flare/CME model to be compared with observations. We use a simulation of a large-scale CME current sheet previously reported by Reeves et al. This simulation includes ohmic and coronal heating, thermal conduction, and radiative cooling in the energy equation. Using the results of this simulation, we perform time-dependent ionization calculations of the flow in a CME current sheet and construct two-dimensional spatial distributions of ionic charge states for multiple chemical elements. We use the filter responses from the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory and the predicted intensities of emission lines to compute the count rates for each of the AIA bands. The results show differences in the emission line intensities between equilibrium and non-equilibrium ionization. The current sheet plasma is underionized at low heights and overionized at large heights. At low heights in the current sheet, the intensities of the AIA 94 angstrom and 131 angstrom channels are lower for non-equilibrium ionization than for equilibrium ionization. At large heights, these intensities are higher for non-equilibrium ionization than for equilibrium ionization inside the current sheet. The assumption of ionization equilibrium would lead to a significant underestimate of the temperature low in the current sheet and overestimate at larger heights. We also calculate the intensities of ultraviolet lines and predict emission features to be compared with events from the Ultraviolet Coronagraph Spectrometer on the Solar and Heliospheric Observatory, including a low-intensity region around the current sheet corresponding to this model.

Funding ProjectNASA[NNX11AB61G] ; NASA[NNH11AQ13I] ; NSF SHINE[AGS-1156076] ; Program 973[2011CB811403] ; NASA[NNH11AQ13I] ; NSFC[11273055] ; CAS[KJCX2-EW-T07] ; NASA (Heliophysics theory program) ; NSF (Frontiers in Earth System Dynamics)
Funding OrganizationNASA[NNX11AB61G, NNH11AQ13I]
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:000323426100029
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCORONAL MASS EJECTION ; MAGNETIC RECONNECTION ; ULTRAVIOLET-SPECTRA ; SOHO OBSERVATIONS ; CHARGE STATES ; PLASMA ; FLARES ; EVOLUTION ; FEATURES ; SPECTROMETER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6224
Collection太阳物理研究组
Corresponding AuthorShen CC(沈呈彩)
Affiliation1.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P. O. Box 110, Kunming, Yunnan 650011, China
3.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
4.Space Science Division, Naval Research Laboratory, Washington, DC 20375, USA
5.Predictive Science, Inc. (PSI), San Diego, CA 92121-2910, USA
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Shen CC,Reeves, KK,Raymond, JC,et al. NON-EQUILIBRIUM IONIZATION MODELING OF THE CURRENT SHEET IN A SIMULATED SOLAR ERUPTION[J]. ASTROPHYSICAL JOURNAL,2013,773(2).
APA Shen CC.,Reeves, KK.,Raymond, JC.,Murphy, NA.,Ko, YK.,...&Linker, JA.(2013).NON-EQUILIBRIUM IONIZATION MODELING OF THE CURRENT SHEET IN A SIMULATED SOLAR ERUPTION.ASTROPHYSICAL JOURNAL,773(2).
MLA Shen CC,et al."NON-EQUILIBRIUM IONIZATION MODELING OF THE CURRENT SHEET IN A SIMULATED SOLAR ERUPTION".ASTROPHYSICAL JOURNAL 773.2(2013).
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