Low-frequency waves in magnetic reconnection
文献类型：期刊论文
| 作者 | Chai LiHui; Li Yi; Wang Shui; Shen Chao |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2012 |
| 卷号 | 57期号:12页码:1461-1466 |
| 关键词 | magnetic reconnection low-frequency waves Alfven-ion cyclotron waves Hall quadrupole structure |
| ISSN号 | 1001-6538 |
| 通讯作者 | Li, Y (reprint author), Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China. |
| 中文摘要 | The characteristics of low-frequency waves in magnetic reconnection are studied using two-dimensional hybrid simulation code. In a coordinate system moving with fluid, the time series of a magnetic field perpendicular to the magnetic reconnection plane, B-y, is transformed into the power spectrum via fast Fourier transformation, while the wave propagation direction and polarization are determined by minimum variance analysis of the electric field. The results show that low-frequency Alfven ion-cyclotron waves dominate the reconnection area. These waves have frequencies 0-1 Omega(p) (where Omega(p) is the local proton gyro frequency) and all are left-handed circularly polarized. Among these waves, large-amplitude turbulence, with frequencies of 0-0.6 Omega(p) and isotropic propagation, dominates the outflow regions. This can cause the reversal of B-y in the quadrupole structure. In the inflow regions, dominant waves, propagating mainly parallel to the ambient magnetic field, have higher frequencies and smaller amplitudes. The frequency of the main peak of wave energy is usually higher than 0.5 Omega(p). |
| 英文摘要 | The characteristics of low-frequency waves in magnetic reconnection are studied using two-dimensional hybrid simulation code. In a coordinate system moving with fluid, the time series of a magnetic field perpendicular to the magnetic reconnection plane, B-y, is transformed into the power spectrum via fast Fourier transformation, while the wave propagation direction and polarization are determined by minimum variance analysis of the electric field. The results show that low-frequency Alfven ion-cyclotron waves dominate the reconnection area. These waves have frequencies 0-1 Omega(p) (where Omega(p) is the local proton gyro frequency) and all are left-handed circularly polarized. Among these waves, large-amplitude turbulence, with frequencies of 0-0.6 Omega(p) and isotropic propagation, dominates the outflow regions. This can cause the reversal of B-y in the quadrupole structure. In the inflow regions, dominant waves, propagating mainly parallel to the ambient magnetic field, have higher frequencies and smaller amplitudes. The frequency of the main peak of wave energy is usually higher than 0.5 Omega(p). |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [41074120, 40974101]; Chinese Academy of Sciences [KJCX2-YW-N28]; State Key Laboratory of Space Weather; National Basic Research Program of China [2011CB811404] |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3315]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Chai LiHui,Li Yi,Wang Shui,et al. Low-frequency waves in magnetic reconnection[J]. CHINESE SCIENCE BULLETIN,2012,57(12):1461-1466. |
| APA | Chai LiHui,Li Yi,Wang Shui,&Shen Chao.(2012).Low-frequency waves in magnetic reconnection.CHINESE SCIENCE BULLETIN,57(12),1461-1466. |
| MLA | Chai LiHui,et al."Low-frequency waves in magnetic reconnection".CHINESE SCIENCE BULLETIN 57.12(2012):1461-1466. |
入库方式： OAI收割
来源：国家空间科学中心
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