| DOI: | 10.1002/2015GL067292
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| 论文题名: | A new spiral model for Saturn's magnetosphere |
| 作者: | Carbary J.F.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9477
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| EISSN: | 1944-9208
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| 出版年: | 2016
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| 卷: | 43, 期:2 | | 起始页码: | 501
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| 结束页码: | 507
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| 语种: | 英语
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| 英文关键词: | periodicities
; Saturn magnetosphere
; spiral
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| Scopus关键词: | Magnetosphere
; Plasma density
; Spacecraft
; Cassini spacecraft
; Magnetic field strengths
; Periodicities
; Plasma mass density
; Real trajectories
; Saturn magnetosphere
; Spacecraft encounters
; Spiral
; Planets
; atmospheric modeling
; Doppler effect
; magnetic field
; magnetosphere
; periodicity
; planetary atmosphere
; Saturn
; wave propagation
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| 英文摘要: | Rather than a clock-like strobe, a rotating spiral may underlie the ~10.7 h periodicities observed in many phenomena in Saturn's magnetosphere. This spiral is a density or flux wave propagating outward from the planet, and the periodicity is generated when a spacecraft encounters the wave. The wave moves outward with the Alfvén speed, which can be computed from the magnetic field strength and plasma mass density. Using data from the first 200 days of 2010, the observed field strength and plasma density are used to compute this speed and construct the spiral. When the Cassini spacecraft "flies through" this model on a real trajectory, the model produces a strong main period at 10.7 h with weaker secondary periods at 10.4 h and 11.0 h resulting from Doppler effects. Periodograms of observed phenomena from the same interval show a main peak at 10.7 h but with spurious secondary peaks due to noise. © 2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956857894&doi=10.1002%2f2015GL067292&partnerID=40&md5=a5a28c3eb28763eb9ac997d4a00dab13
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10440
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States
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| Recommended Citation: | |
Carbary J.F.. A new spiral model for Saturn's magnetosphere[J]. Geophysical Research Letters,2016-01-01,43(2).
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