Effects of heavy ions on kinetic Alfven waves
文献类型：期刊论文
| 作者 | Yang, L ; Wu, DJ
|
| 刊名 | COMMUNICATIONS IN THEORETICAL PHYSICS
 |
| 出版日期 | 2005-02-15 |
| 卷号 | 43期号:2页码:325-332 |
| ISSN号 | 0253-6102 |
| 关键词 | space plasma heavy ions kinetic Alfven wave dispersion relation |
| 英文摘要 | Kinetic Alfven Wave (KAW) is one of the low-frequency electromagnetic fluctuations that are identified extensively in space plasmas by in situ observations of satellites and has been an interesting topic for discussion widely in the fields of laboratory, space, and astrophysical plasmas because of its potential importance in plasma particle energization. Some satellite observations show that the number density ratio of the oxygen ions to the ambient plasma is 30% similar to 50%, sometimes, even as high as 80%. In this paper, effects of heavy ion species on KAWs are studied in a low-beta plasma. The results show that heavy ions not only considerably reduce the propagation speed of KAWs, but also remarkably influence the parallel component of perturbed electric field of KAWs (to the ambient magnetic field). The ratio of parallel to perpendicular components of perturbed field decreases (or increases) with the heavy ion abundance for KAWs dominated by the electron inertial length (or by ion acoustic gyroradius). In particular, the resonant condition of KAWs with thermal electrons is modified by the heavy ion species. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | ELECTRON ACCELERATION ; PLASMA ; EXCITATION ; AURORA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000227424300026 |
| 公开日期 | 2012-03-07 |
| 源URL | [http://159.226.72.40/handle/332002/4130]  |
| 专题 | 紫金山天文台_太阳和太阳系等离子体研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, L,Wu, DJ. Effects of heavy ions on kinetic Alfven waves[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2005,43(2):325-332. |
| APA | Yang, L,&Wu, DJ.(2005).Effects of heavy ions on kinetic Alfven waves.COMMUNICATIONS IN THEORETICAL PHYSICS,43(2),325-332. |
| MLA | Yang, L,et al."Effects of heavy ions on kinetic Alfven waves".COMMUNICATIONS IN THEORETICAL PHYSICS 43.2(2005):325-332. |
入库方式： OAI收割
来源：紫金山天文台
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