NON-EQUILIBRIUM IONIZATION MODELING OF THE CURRENT SHEET IN A SIMULATED SOLAR ERUPTION
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2013-08-20 |
| 卷号 | 773期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | atomic processes magnetic reconnection Sun: coronal mass ejections (CMEs) Sun: UV radiation |
| 通讯作者 | Shen, CC (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. |
| 产权排序 | 第二完成单位 |
| 英文摘要 | 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. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | CORONAL MASS EJECTION ; MAGNETIC RECONNECTION ; ULTRAVIOLET-SPECTRA ; SOHO OBSERVATIONS ; CHARGE STATES ; PLASMA ; FLARES ; EVOLUTION ; FEATURES ; SPECTROMETER |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/773/2/110/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000323426100029 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6224]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 作者单位 | 1.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 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：云南天文台
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