Electron Heat Flux Instabilities in the Inner Heliosphere: Radial Distribution and Implication on the Evolution of the Electron Velocity Distribution Function
文献类型：期刊论文
| 作者 | Sun,Heyu1,4; Zhao,Jinsong1,2,4; Liu,Wen1,4; Voitenko,Yuriy3; Pierrard,Viviane3; Shi,Chen1,4; Yao,Yuhang1,4; Xie,Huasheng5,6; Wu,Dejin4 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 916期号:1 |
| ISSN号 | 2041-8205 |
| 关键词 | Plasma astrophysics Space plasmas Solar wind |
| DOI | 10.3847/2041-8213/ac0f02 |
| 英文摘要 | Abstract This Letter investigates the electron heat flux instability using the radial models of the magnetic field and plasma parameters in the inner heliosphere. Our results show that both the electron acoustic wave and the oblique whistler wave are unstable in the regime with large relative drift speed (ΔVe) between electron beam and core populations. Landau-resonant interactions of electron acoustic waves increase the electron parallel temperature that would lead to suppressing the electron acoustic instability and amplifying the growth of oblique whistler waves. Therefore, we propose that the electron heat flux can effectively drive oblique whistler waves in an anisotropic electron velocity distribution function. This study also finds that lower-hybrid waves and oblique Alfvén waves can be triggered in the solar atmosphere, and that the former instability is much stronger than the latter. Moreover, we clarify that the excitation of lower-hybrid waves mainly results from the transit-time interaction of beaming electrons with resonant velocities v∥ ～ ω/k∥, where ω and k∥ are the wave frequency and parallel wavenumber, respectively. In addition, this study shows that the instability of quasi-parallel whistler waves can dominate the regime with medium ΔVe at the heliocentric distance nearly larger than 10 times of the solar radius. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-916-1-AC0F02 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/56852]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhao,Jinsong |
| 作者单位 | 1.School of Astronomy and Space Science,University of Science and Technology of China, Hefei 230026, People’s Republic of China 2.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China 3.Solar-Terrestrial Centre of Excellence, Space Physics Division, Royal Belgian Institute for Space Aeronomy, 3 av. Circulaire, B-1180, Brussels, Belgium 4.Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People’s Republic of China; js_zhao@pmo.ac.cn 5.ENN Science and Technology Development Co., Ltd., Langfang 065001, People’s Republic of China 6.Hebei Key Laboratory of Compact Fusion, Langfang 065001, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Sun,Heyu,Zhao,Jinsong,Liu,Wen,et al. Electron Heat Flux Instabilities in the Inner Heliosphere: Radial Distribution and Implication on the Evolution of the Electron Velocity Distribution Function[J]. The Astrophysical Journal Letters,2021,916(1). |
| APA | Sun,Heyu.,Zhao,Jinsong.,Liu,Wen.,Voitenko,Yuriy.,Pierrard,Viviane.,...&Wu,Dejin.(2021).Electron Heat Flux Instabilities in the Inner Heliosphere: Radial Distribution and Implication on the Evolution of the Electron Velocity Distribution Function.The Astrophysical Journal Letters,916(1). |
| MLA | Sun,Heyu,et al."Electron Heat Flux Instabilities in the Inner Heliosphere: Radial Distribution and Implication on the Evolution of the Electron Velocity Distribution Function".The Astrophysical Journal Letters 916.1(2021). |
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来源：国家天文台
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