Localized deposition and sputtering of Jovian ionospheric sodium on Io

Details Localized deposition and sputtering of Jovian ionospheric sodium on Io Localized deposition and sputtering of Jovian ionospheric sodium on Io

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..419h&link_type=abstract

Planetary and Space Science, vol. 27, Apr. 1979, p. 419-424.

Astronomy and Astrophysics

Astronomy

2

Io, Ionospheric Currents, Jupiter Atmosphere, Planetary Ionospheres, Sodium Vapor, Sputtering, Astronomical Models, Planetary Surfaces, Birkeland Current, Deposition, Sputtering, Jupiter, Ionosphere, Sodium, Io, Satellites, Surface, Ions, Orbits, Motion, Clouds, Hypotheses, Asymmetry, Mathematical Models, Review, Observations, Optical Properties

Scientific paper

Because of relative motion between the innermost Galilean satellite Io and Jupiter's ionosphere, a current is drawn from the ionosphere that can be a source of both deposition on, and sputtering from, the surface of Io. It is shown that the ions in this current strike Io in a localized region in the quadrant bounded by a line connecting Io and Jupiter and a tangent line extended in the direction of Io's orbital motion. If these ions are the principal source of sodium that is sputtered from Io, then this current provides a simple explanation of the observation of a localized area from which sodium ions escape from Io. The geometry of this current may also affect the optical surface of Io. Several experimental tests are suggested that can determine the compatibility of this hypothesis with the directly observable properties of Io's surface.

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