A Lagrangian scheme for time-dependent ionization in simulations of astrophysical plasmas
文献类型：期刊论文
| 作者 | Shen, C1; Raymond, JC1; Murphy, NA1; Lin J(林隽)2
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| 刊名 | ASTRONOMY AND COMPUTING
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| 出版日期 | 2015-09 |
| 卷号 | 12页码:1-10 |
| 关键词 | MHD simulation Time-dependent ionization Numerical calculation |
| ISSN号 | 2213-1337 |
| 产权排序 | 第二完成单位 |
| 通讯作者 | Shen, C (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA. |
| 英文摘要 | Time-dependent ionization is important in astrophysical environments where the thermodynamical time scale is shorter than the ionization or recombination time scales. In this work, we report a FORTRAN program that performs fast non-equilibrium ionization calculations in post-processing based on hydrodynamics(HD) or magnetohydrodynamics(MHD) simulation results. Using HD or MHD simulation results, we track the movement of plasma in a Lagrangian framework, and obtain the evolutionary history of temperature and electron density. The time-dependent ionization equations are then solved by the Eigenvalue method. For any complex temperature and electron density histories, we introduce an adaptive time-step strategy to improve the computational efficiency. Our tests show that this program has advantages of high numerical stability and high accuracy. In addition, it is also easy to extend this solver to other HD and MHD simulations. This code is freely available for download from the Web. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics ; Computer Science |
| 类目[WOS] | Astronomy & Astrophysics ; Computer Science, Interdisciplinary Applications |
| 研究领域[WOS] | Astronomy & Astrophysics ; Computer Science |
| 关键词[WOS] | CORONAL MASS EJECTION ; X-RAY-EMISSION ; SUPERNOVA-REMNANTS ; RATE COEFFICIENTS ; ATOMIC DATABASE ; STAR-FORMATION ; CASSIOPEIA-A ; RECOMBINATION ; EQUILIBRIUM ; EXPLOSION |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S2213133715000372 |
| 语种 | 英语 |
| WOS记录号 | WOS:000362859800001 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6265]  |
| 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 Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China |
| 推荐引用方式 GB/T 7714 | Shen, C,Raymond, JC,Murphy, NA,et al. A Lagrangian scheme for time-dependent ionization in simulations of astrophysical plasmas[J]. ASTRONOMY AND COMPUTING,2015,12:1-10. |
| APA | Shen, C,Raymond, JC,Murphy, NA,&Lin J.(2015).A Lagrangian scheme for time-dependent ionization in simulations of astrophysical plasmas.ASTRONOMY AND COMPUTING,12,1-10. |
| MLA | Shen, C,et al."A Lagrangian scheme for time-dependent ionization in simulations of astrophysical plasmas".ASTRONOMY AND COMPUTING 12(2015):1-10. |
入库方式： OAI收割
来源：云南天文台
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