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DOI | 10.1029/2021GL094559 |
Observation of periodic rising and falling tone ECH waves at Saturn | |
S. Teng; Y. Wu; R. Guo; Z. Yao; X. Tao | |
2021-07-21 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Electron cyclotron harmonic (ECH) waves are effective in precipitating electrons into the loss cone to form diffuse aurora. Recent observations have shown that ECH waves at Earth could exhibit frequency chirping, which is an interesting feature of various plasma waves and whose mechanism is under intensive research. Whether chirping of ECH waves is also present in other planetary magnetospheres, however, is unknown. In this paper, we report the first observation of quasi-periodic ECH waves with frequency chirping at Saturn using Cassini data. The identified six falling tone and one rising tone ECH wave events occur at near the magnetic equator. The duration of ECH wave chirping elements lasts from seconds to minutes. Our findings suggest that frequency chirping of ECH waves could be observed at other planetary magnetosphere, and are useful to understand the fundamental mechanisms of frequency chirping of various plasma waves. |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/334084 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | S. Teng,Y. Wu,R. Guo,et al. Observation of periodic rising and falling tone ECH waves at Saturn[J]. Geophysical Research Letters,2021. |
APA | S. Teng,Y. Wu,R. Guo,Z. Yao,&X. Tao.(2021).Observation of periodic rising and falling tone ECH waves at Saturn.Geophysical Research Letters. |
MLA | S. Teng,et al."Observation of periodic rising and falling tone ECH waves at Saturn".Geophysical Research Letters (2021). |
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