| DOI: | 10.1002/grl.50994
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| 论文题名: | Wavy magnetodisk in Saturn's outer magnetosphere |
| 作者: | Carbary J.F.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8506
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| EISSN: | 1944-8237
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| 出版年: | 2013
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| 卷: | 40, 期:19 | | 起始页码: | 5024
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| 结束页码: | 5028
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| 语种: | 英语
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| 英文关键词: | Saturn magnetodisk
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| Scopus关键词: | Critical radius
; Energetic charged particles
; Inner magnetosphere
; Least squares fit
; Lomb periodogram
; Magnetosphere model
; Saturn magnetodisk
; Spectral feature
; Earth sciences
; Geophysics
; Magnetosphere
; accuracy assessment
; magnetosphere
; numerical model
; Saturn
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| 英文摘要: | A simple wavy magnetodisk model can explain periodicities in energetic charged particles observed in Saturn's outer magnetosphere (>20 R S). The model's free parameters are the tilt of magnetodisk in inner magnetosphere (∼1.8°), speed of outgoing spiral wave (∼8 R S/h), critical radius (∼10 RS), and period of rotation (10.64 h). The fidelity of the model is not judged by a least squares fit to the actual data, but rather by the model's accuracy in reproducing the Lomb periodogram of the periodicities. The model accurately simulates the main spectral feature near ∼10.7 h plus a secondary ("dual") period near ∼10.95 h. The ability of the wavy magnetodisk with one period to produce the observed dual periodicity in the observations suggests that models having "dual" periods need not be invoked to explain some of the periodicities in Saturn's outer magnetosphere. Key Points Wavy magnetodisk model gives dual periods in Saturn outer magnetosphere Model parameters are 1.8{degree sign} tilt, 8 RS/h speed, 10 RS critical radius Dual rotating hemispheres not required to produce dual periods ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885006540&doi=10.1002%2fgrl.50994&partnerID=40&md5=877f5df9003daa756e4176555d3491d8
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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/5770
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, United States
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| Recommended Citation: | |
Carbary J.F.. Wavy magnetodisk in Saturn's outer magnetosphere[J]. Geophysical Research Letters,2013-01-01,40(19).
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