UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Detection of a strongly negative surface potential at Saturn's moon Hyperion

Nordheim, TA; Jones, GH; Roussos, E; Leisner, JS; Coates, AJ; Kurth, WS; Khurana, KK; ... Waite, JH; + view all (2014) Detection of a strongly negative surface potential at Saturn's moon Hyperion. GEOPHYSICAL RESEARCH LETTERS , 41 (20) 7011 - 7018. 10.1002/2014GL061127. Green open access

[thumbnail of grl52129.pdf]
Preview
PDF
grl52129.pdf

Download (1MB)

Abstract

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.

Type: Article
Title: Detection of a strongly negative surface potential at Saturn's moon Hyperion
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/2014GL061127
Publisher version: http://dx.doi.org/10.1002/2014GL061127
Language: English
Additional information: ©2014. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: Saturn's moons, surface charging, Cassini, Hyperion
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/1452135
Downloads since deposit
104Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item