Galileo observes electromagnetically coupled dust in the Jovian magnetosphere

Grun, E., Kruger, H., Graps, A.L., Hamilton, D.P., Heck, A., Linkert, G., Zook, Harald, Dermott, S., Fechtig, H., Gustafson, B.A., and others. (1998) Galileo observes electromagnetically coupled dust in the Jovian magnetosphere. Journal of Geophysical Research-Planets, 103 (E9). pp. 20011-20022. ISSN 0148-0227. (doi:10.1029/98JE00228) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1029/98JE00228

Abstract

Measurements of dust coupled to the Jovian magnetosphere have been obtained with the dust detector on board the Galileo spacecraft. We report on data obtained during the first four orbits about Jupiter that had flybys of the Galilean satellites: Ganymede (orbits 1 and 2), Callisto (orbit 3), and Europa (orbit 4). The most prominent features observed are highly time variable dust streams recorded throughout the Jovian system. The impact rate varied by up to 2 orders of magnitude with a 5 and 10 hour periodicity, which shows a correlation with Galileo's position relative to the Jovian magnetic field. Around 20 R-J (Jupiter radius, R-J = 71,492 km) in bound a dip in the impact rate has been found consistently. At the same times, reversals by 180 degrees in impact direction occurred. This behavior can be qualitatively explained by strong coupling of nanometer-sized dust to the Jovian magnetic field. At times of satellite flybys, enhanced rates of dust impacts have been observed, which suggests that all Galilean satellites are sources of ejecta particles. Inside about 20 R-J impacts of micrometer-sized particles have been recorded that could be particles on bound orbits about Jupiter.

Item Type: Article
DOI/Identification number: 10.1029/98JE00228
Additional information: Conference on Magnetospheres of the Outer Planets BOULDER, COLORADO, MAR 17-21, 1997 NASA, Jet Prop Lab, Galileo Project
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: R.F. Xu
Date Deposited: 08 Jul 2009 13:20 UTC
Last Modified: 10 Jun 2019 09:24 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/17788 (The current URI for this page, for reference purposes)
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