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DOI | 10.1029/2019GL083899 |
First Evidence for Multiple-Harmonic Standing Alfven Waves in Jupiter's Equatorial Plasma Sheet | |
Manners, H.; Masters, A. | |
2019-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:16页码:9344-9351 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Quasiperiodic pulsations in the ultralow-frequency band are ubiquitously observed in the Jovian magnetosphere, but their source and distribution have until now been a mystery. Standing Alfven waves on magnetic field lines have been proposed to explain these pulsations and their large range in observed periods. However, in situ evidence in support of this mechanism has been scarce. Here we use magnetometer data from the Galileo spacecraft to report first evidence of a multiple-harmonic ultralow-frequency event in Jupiter's equatorial plasma sheet. The harmonic periods lie in the 4- to 22-min range, and the nodal structure is confined to the plasma sheet. Polarization analysis reveals several elliptically polarized odd harmonics and no presence of even harmonics. The harmonic periods, their polarization, and the confinement of the wave to the plasma sheet are strong evidence supporting the standing Alfven wave model. Multiple-harmonic waves therefore potentially explain the full range of periods in quasiperiodic pulsations in Jupiter's magnetosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490966700005 |
WOS关键词 | LOW-FREQUENCY WAVES ; MAGNETIC PULSATIONS ; ULYSSES ; MAGNETOSPHERE ; GALILEO ; BURSTS ; RADIO |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/186215 |
专题 | 气候变化 |
作者单位 | Imperial Coll London, Blackett Lab, Space & Atmospher Phys Grp, London, England |
推荐引用方式 GB/T 7714 | Manners, H.,Masters, A.. First Evidence for Multiple-Harmonic Standing Alfven Waves in Jupiter's Equatorial Plasma Sheet[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(16):9344-9351. |
APA | Manners, H.,&Masters, A..(2019).First Evidence for Multiple-Harmonic Standing Alfven Waves in Jupiter's Equatorial Plasma Sheet.GEOPHYSICAL RESEARCH LETTERS,46(16),9344-9351. |
MLA | Manners, H.,et al."First Evidence for Multiple-Harmonic Standing Alfven Waves in Jupiter's Equatorial Plasma Sheet".GEOPHYSICAL RESEARCH LETTERS 46.16(2019):9344-9351. |
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