Resonant Mode Conversion of Alfvén Waves to Kinetic Alfvén Waves in an Inhomogeneous Plasma
文献类型：期刊论文
| 作者 | Xiang,L.1,2; Chen,L.1; Wu,D. J.1 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-08-13 |
| 卷号 | 881期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | instabilities Sun: atmosphere waves |
| DOI | 10.3847/1538-4357/ab2bf1 |
| 英文摘要 | Abstract Kinetic Alfvén waves (KAWs) are dispersive Alfvén waves (AWs) with a perpendicular wavelength comparable to the ion (ion–acoustic) gyroradius or the electron inertial length and can play an important role in wave energy dissipation and particle energization. In this paper, we investigate the resonant mode conversion of AWs into KAWs for the case of an arbitrary angle α between the density gradient of the ambient plasma and the ambient magnetic field in an inhomogeneous two-temperature magnetoplasma. The results show that the mode conversion sensitively depends on the angle α, the density inhomogeneous gradient , and the parallel wavenumber , as well as the ion to electron temperature ratio . In particular, the excited KAWs are stronger when α is closer to 90° and are hardly excited for . Moreover, the maximal strength of the excited KAW increases with the increase of , but decreases with the increase of . Also, the maximal strength of the excited KAW has a larger value at larger for . These results are helpful for our comprehensive understanding of the resonant mode conversion of AWs into KAWs in solar magnetic atmospheres when AWs originating from the photosphere propagate along solar magnetic fields into the corona. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-881-1-AB2BF1 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27250]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, 210034, Nanjing, People's Republic of China djwu@pmo.ac.cn 2.University of Science and Technology of China, 230026, Hefei, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Xiang,L.,Chen,L.,Wu,D. J.. Resonant Mode Conversion of Alfvén Waves to Kinetic Alfvén Waves in an Inhomogeneous Plasma[J]. The Astrophysical Journal,2019,881(1). |
| APA | Xiang,L.,Chen,L.,&Wu,D. J..(2019).Resonant Mode Conversion of Alfvén Waves to Kinetic Alfvén Waves in an Inhomogeneous Plasma.The Astrophysical Journal,881(1). |
| MLA | Xiang,L.,et al."Resonant Mode Conversion of Alfvén Waves to Kinetic Alfvén Waves in an Inhomogeneous Plasma".The Astrophysical Journal 881.1(2019). |
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来源：紫金山天文台
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