Estimating horizontal electric current in solar active regions
文献类型：期刊论文
| 作者 | Ji, HS ; Song, MT; Li, XQ; Hu, FM
|
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 1998-10-01 |
| 卷号 | 182期号:2页码:365-379 |
| 关键词 | FREE MAGNETIC-FIELDS FLARE PHENOMENA MORPHOLOGY NOAA-6659 VECTOR JUNE |
| ISSN号 | 0038-0938 |
| 英文摘要 | Within the framework of nonlinear force-free field models, we have developed a relaxation scheme for estimating horizontal electric currents in solar active regions. The test case which uses an analytical solution shows that at each iteration step the average Lorentz force decreases rapidly and the values of partial derivative B-x/partial derivative z and partial derivative By/partial derivative z converge well toward analytical ones. As a result the computed horizontal electric currents and analytical ones show good agreement in both distribution and magnitude. This scheme has avoided mathematical singularities along the inversion line B-z = 0 which appeared in the previous extrapolating methods. Then this newly developed scheme is used to analyze the vector magnetogram of a Rare-prolific region NOAA 6659. The computational results show the following: (1) The distribution of horizontal electric current and vertical electric current share a similar configuration. (2) Near the separator of a quadrupole field configuration of this active region there is a confined region of strong horizontal electric currents, near which a white-light flare took place on the same day. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | FREE MAGNETIC-FIELDS ; FLARE PHENOMENA ; MORPHOLOGY ; NOAA-6659 ; VECTOR ; JUNE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000077322300006 |
| 公开日期 | 2013-02-05 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/8352]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Beijing Astron Observ, Huairou Solar Stn, Beijing 100080, Peoples R China 3.Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ji, HS,Song, MT,Li, XQ,et al. Estimating horizontal electric current in solar active regions[J]. SOLAR PHYSICS,1998,182(2):365-379. |
| APA | Ji, HS,Song, MT,Li, XQ,&Hu, FM.(1998).Estimating horizontal electric current in solar active regions.SOLAR PHYSICS,182(2),365-379. |
| MLA | Ji, HS,et al."Estimating horizontal electric current in solar active regions".SOLAR PHYSICS 182.2(1998):365-379. |
入库方式： OAI收割
来源：紫金山天文台
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