Internal structures of the Galilean satellites

Details Internal structures of the Galilean satellites Internal structures of the Galilean satellites

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47...46s&link_type=abstract

Icarus, vol. 47, July 1981, p. 46-59.

Astronomy and Astrophysics

Astronomy

82

Astronomical Models, Galilean Satellites, Heat Transmission, Planetary Structure, Volcanology, Cratering, Modulus Of Elasticity, Satellite Surfaces, Temperature Distribution, Tides, Jupiter, Satellites, Interiors, Structure, Models, Ganymede, Accretion, Callisto, Layers, Thickness, Cores, Crusts, Tidal Effects, Heating, Io, Dynamics, Ice, Rocks, Silicate, Melting, Water, Radioactivity, Nebulas, Viscosity, Temperatures, Surface, Formation, Distance, Gravity Effects

Scientific paper

Models for the interior structures of Io, Ganymede and Callisto are proposed based on recent discoveries of volcanism and high heat flow on Io, a primordial, heavily cratered surface on Callisto, and a surface modified by endogenic processes on Ganymede. The model for Io consists of a thin, high-rigidity outer shell overlying a thin, partially molten or molten layer maintained by tidal dissipation in the outer shell, which in turn surrounds a solid interior. Ganymede is modeled as an ice outer layer surrounding a shell of undifferentiated, primordial ice-silicate mixture and a rock core, with accretional heating responsible for melting the ice in an originally homogeneous ice-silicate interior. Finally, the old, heavily cratered surface of Callisto is interpreted as suggesting a primordial ice-silicate mixture with little, if any, ice-rock differentiation in the interior.

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