Publication Date:
2019-06-28
Description:
Radial profiles of the ion density and flux-tube content in the Io torus have peak values inside Io's orbit, even though Io is the effective source of these ions. Formation of an inward peak constrains either the velocity distributions or source regions of sputtered neutrals. A further constraint is that the ionization of neutrals on trapped trajectories that return to Io's surface must be limited. A dominant sulphur source is most easily reconciled with these constraints.
Keywords:
LUNAR AND PLANETARY EXPLORATION
Type:
Nature (ISSN 0028-0836); 315; 373-378
Format:
text