Explorations of electric-current system in solar active regions .1. Empirical inferences of the current flows
文献类型：期刊论文
| 作者 | Ding YJ; Hagyard MJ; Deloach AC; Hong QF; Liu XP |
| 刊名 | Solar Physics
 |
| 出版日期 | 1987 |
| 卷号 | 109期号:2页码:307-320 |
| ISSN号 | 0038-0938 |
| 通讯作者 | DING, YJ (reprint author), ACAD SINICA,YUNNAN OBSERV,KUNMING,PEOPLES R CHINA. |
| 中文摘要 | In this paper we explore techniques to identify sources of electric current systems and their channels of flow in solar active regions. Measured photospheric vector magnetic fields (VMF) together with high-resolution white-light and H filtergrams provide the data base to derive the current systems in the photosphere and chromosphere. Simple mathematical constructions of fields and currents are also adopted to understand these data. As an example, the techniques are then applied to infer current systems in AR 2372 in early April 1980. The main results are: (i) In unipolar sunspots the current density may reach values of 103 CGSE, and the Lorentz force on it can accelerate the Evershed flow, (ii) Spots exhibiting significant spiral pattrn in the penumbral filaments are the sources of vertical major currents at the photospheric surface, (iii) Magnetic neutral lines where the transverse field was strongly sheared were channels along which strong current system flows, (iv) The inferred current systems produced oppositely-flowing currents in the area of the delta configuration that was the site of flaring in AR 2372. |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1987J313800006 |
| 公开日期 | 2009-08-03 ; 2010-08-20 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/39722]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Ding YJ,Hagyard MJ,Deloach AC,et al. Explorations of electric-current system in solar active regions .1. Empirical inferences of the current flows[J]. Solar Physics,1987,109(2):307-320. |
| APA | Ding YJ,Hagyard MJ,Deloach AC,Hong QF,&Liu XP.(1987).Explorations of electric-current system in solar active regions .1. Empirical inferences of the current flows.Solar Physics,109(2),307-320. |
| MLA | Ding YJ,et al."Explorations of electric-current system in solar active regions .1. Empirical inferences of the current flows".Solar Physics 109.2(1987):307-320. |
入库方式： OAI收割
来源：力学研究所
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