DOI: 10.1002/2014GL061127
论文题名: Detection of a strongly negative surface potential at Saturn's moon Hyperion
作者: Nordheim T.A. ; Jones G.H. ; Roussos E. ; Leisner J.S. ; Coates A.J. ; Kurth W.S. ; Khurana K.K. ; Krupp N. ; Dougherty M.K. ; Waite J.H.
刊名: Geophysical Research Letters
ISSN: 0094-9667
EISSN: 1944-9398
出版年: 2014
卷: 41, 期: 20 起始页码: 7011
结束页码: 7018
语种: 英语
英文关键词: Cassini
; Hyperion
; Saturn's moons
; surface charging
Scopus关键词: Electron beams
; Electrons
; Magnetosphere
; Moon
; Planets
; Plasma waves
; Spacecraft instruments
; Spectrometers
; Cassini
; Cassini plasma spectrometer
; Field-aligned electrons
; Hyperion
; Magnetospheric imaging instruments
; Magnetospheric measurements
; Saturn's moons
; Surface charging
; Surface potential
; detection method
; electron
; Hyperion
; magnetosphere
; Saturn
英文摘要: On 26 September 2005, Cassini conducted its only close targeted flyby of Saturn's small, irregularly shaped moon Hyperion. Approximately 6-min before the closest approach, the electron spectrometer (ELS), part of the Cassini Plasma Spectrometer (CAPS) detected a field-aligned electron population originating from the direction of the moon's surface. Plasma wave activity detected by the Radio and Plasma Wave instrument suggests electron beam activity. A dropout in energetic electrons was observed by both CAPS-ELS and the Magnetospheric Imaging Instrument Low-Energy Magnetospheric Measurement System, indicating that the moon and the spacecraft were magnetically connected when the field-aligned electron population was observed. We show that this constitutes a remote detection of a strongly negative (∼-200-V) surface potential on Hyperion, consistent with the predicted surface potential in regions near the solar terminator. Key Points Cassini detected evidence of surface charging on Saturn's moon HyperionStrong negative surface potential caused electron beam between moon and CassiniObserved potential compares well with predicted potential near terminator ©2014. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911411776&doi=10.1002%2f2014GL061127&partnerID=40&md5=57a903038e9a48cf42b1064adfa9b26f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6931
Appears in Collections: 气候减缓与适应
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作者单位: Mullard Space Science Laboratory, University College London, Dorking, United Kingdom
Recommended Citation:
Nordheim T.A.,Jones G.H.,Roussos E.,et al. Detection of a strongly negative surface potential at Saturn's moon Hyperion[J]. Geophysical Research Letters,2014-01-01,41(20).