Ionization source near Io from Galileo wake data

Details Ionization source near Io from Galileo wake data Ionization source near Io from Galileo wake data

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2111b&link_type=abstract

Geophysical Research Letters, vol. 24, p. 2111

Physics

33

Galileo Spacecraft, Near Wakes, Plasmas (Physics), Extraterrestrial Environments, Atmospheric Ionization, Wakes, Mathematical Models, Ion Sources, Space Probes, Magnetohydrodynamic Flow

Scientific paper

From measurements of plasma fluxes obtained along the Galileo trajectory through the wake of Io we estimate the source of ions within 5 RIo of the satellite to be 0.5 to 1.7 x 1028 s-1 (18 to 58% of the canonical 3 x 1028 s-1 torus supply rate). This source of ionization close to Io can supply 0.3 to 0.8 x 1012 watts to the torus plasma (15 to 28% of the canonical 3 x 1012 watts of EUV emissions from the torus). Modeling the energy flux at the spacecraft with local ionization matches the observations reasonably well, which we interpret as evidence against extensive additional charge exchange reactions occurring near Io.

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