Plasma flow in the magnetosphere of Ganymede

Details Plasma flow in the magnetosphere of Ganymede Plasma flow in the magnetosphere of Ganymede

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.1257e&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 8, p. 1257-1260

Mathematics

Logic

5

Planetology: Fluid Planets: Magnetospheres

Scientific paper

Galileo Energetic Particles Detector (EPD) measurements indicate that convective flow speeds near Ganymede decrease to less than one-third of rigid corotation well before any significant increase in the magnetic field strength along the trajectory is observed. In an Alfvén wing model, such a deceleration implies that the Ganymede magnetosphere is a conducting object. We assess the magnitude of various conductivities and find that closure of the Alfvén wing current is attainable only through the body of Ganymede itself. We discuss briefly the planetological implications of this magnetospheric result.

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