| DOI: | 10.1002/2014GL061081
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| 论文题名: | Saturn's elusive nightside polar arc |
| 作者: | Radioti A.; Grodent D.; Gérard J.-C.; Milan S.E.; Fear R.C.; Jackman C.M.; Bonfond B.; Pryor W.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9792
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| EISSN: | 1944-9523
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| 出版年: | 2014
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| 卷: | 41, 期:18 | | 起始页码: | 6321
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| 结束页码: | 6328
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| 语种: | 英语
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| 英文关键词: | aurora
; magnetotail
; reconnection
; Saturn
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| Scopus关键词: | Magnetosphere
; Solar wind
; aurora
; Auroral emission
; Magnetic field line
; Magnetotail dynamics
; Magnetotails
; Optical signatures
; reconnection
; Saturn
; Planets
; aurora
; magnetic field
; magnetosphere
; Saturn
; solar wind
|
| 英文摘要: | Nightside polar arcs are some of the most puzzling auroral emissions at Earth. They are features which extend from the nightside auroral oval into the open magnetic field line region (polar cap), and they represent optical signatures of magnetotail dynamics. Here we report the first observation of an arc at Saturn, which is attached at the nightside main oval and extends into the polar cap region, resembling a terrestrial transpolar arc. We show that Earth-like polar arcs can exceptionally occur in a fast rotational and internally influenced magnetosphere such as Saturn's. Finally, we discuss the possibility that the polar arc at Saturn is related to tail reconnection and we address the role of solar wind in the magnetotail dynamics at Saturn. Key PointsDiscovery of a nightside polar arc at SaturnEarth-like transpolar arc can occur in internally influenced magnetosphereSaturn's polar arc might be related to solar wind driven tail reconnection ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911382508&doi=10.1002%2f2014GL061081&partnerID=40&md5=fd2d5626b4242e03b432225f4a127e1c
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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/7056
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Laboratoire de Physique Atmosphérique et Planétaire, Institut d'Astrophysique et de Géophysique, Université de Liège, Liège, Belgium
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| Recommended Citation: | |
Radioti A.,Grodent D.,Gérard J.-C.,et al. Saturn's elusive nightside polar arc[J]. Geophysical Research Letters,2014-01-01,41(18).
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