Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076184 |
Intense Harmonic Emissions Observed in Saturn's Ionosphere | |
Sulaiman, A. H.1; Kurth, W. S.1; Persoon, A. M.1; Menietti, J. D.1; Farrell, W. M.2; Ye, S. -Y.1; Hospodarsky, G. B.1; Gurnett, D. A.1; Hadid, L. Z.3 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Sweden |
英文摘要 | The Cassini spacecraft's first Grand Finale orbit was carried out in April 2017. This set of 22 orbits had an inclination of 63 degrees with a periapsis grazing Saturn's ionosphere, thus providing unprecedented coverage and proximity to the planet. Cassini's Radio and Plasma Wave Science instrument repeatedly detected intense electrostatic waves and their harmonics near closest approach in the dayside equatorial topside ionosphere. The fundamental modes were found to both scale and trend best with the H+ plasma or lower hybrid frequencies, depending on the plasma composition considered. The fine-structured harmonics are unlike previous observations, which scale with cyclotron frequencies. We explore their generation mechanism and show strong evidence of their association with whistler mode waves, consistent with theory. The possibility of Cassini's presence in the ionosphere influencing the resonance and harmonics is discussed. Given their link to the lower hybrid frequency, these emissions may offer clues to constraining Saturn's ionospheric properties. |
英文关键词 | Saturn ionosphere lower hybrid |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700025 |
WOS关键词 | PLASMA-WAVE OBSERVATIONS ; LOWER-HYBRID WAVES ; RADIO ; TURBULENCE |
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/26984 |
专题 | 气候变化 |
作者单位 | 1.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 3.Swedish Inst Space Phys, Uppsala, Sweden |
推荐引用方式 GB/T 7714 | Sulaiman, A. H.,Kurth, W. S.,Persoon, A. M.,et al. Intense Harmonic Emissions Observed in Saturn's Ionosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Sulaiman, A. H..,Kurth, W. S..,Persoon, A. M..,Menietti, J. D..,Farrell, W. M..,...&Hadid, L. Z..(2017).Intense Harmonic Emissions Observed in Saturn's Ionosphere.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Sulaiman, A. H.,et al."Intense Harmonic Emissions Observed in Saturn's Ionosphere".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
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