Mass-radius relationships in icy satellites after Voyager

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, Ice, Icy Satellites, Jupiter Satellites, Mass Ratios, Satellite Surfaces, Saturn Satellites, Voyager Project, Galilean Satellites, Heat Transfer, Planetary Composition, Pressure Effects, Radii, Rhea (Astronomy), Rocks, Silicates, Surface Temperature, Titan, Planets, Icy Satellites, Mass, Radius, Voyager, Jupiter, Saturn, Rhea, Models, Compression, Interiors, Europa, Ganymede, Callisto, Titan, Differentiation, Thermal Transport, Hypotheses, Composition, Silicate, Comparisons, Rocks, Ice,

Scientific paper

Using improved data for the masses and radii of the satellites of Jupiter and Saturn, models accounting for self-compression effects are presented for the interiors of Europa, Ganymede, Callisto, Rhea, and Titan. For the differentiated models, two different possible scenarios for heat transport are treated, as well as two different compositions for the silicate component. Undifferentiated models are also treated. In each case, the models of Ganymede, Callisto, and Titan show noticeable similarities. It is found that estimates of the ice-rock ratio are dependent upon the assumptions made about the heat transport mechanisms, the rock composition, and on the distribution of rock and ice in the satellite's interior.

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