Models of Saturn's interior - Evidence for phase separation

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, Phase Separation (Materials), Planetary Composition, Planetary Structure, Saturn (Planet), Jupiter (Planet), Planetary Evolution, Planetary Gravitation, Planetary Mass, Planetary Rotation, Planetary Temperature, Origin, Saturn, Temperatures, Jupiter, Water, Models, Gravitational Fields, Chemical Composition, Core, Accretion, Rocks, Pressure, Interior

Scientific paper

Models of Saturn's interior have been constructed based on an accumulation picture of planet formation. It was found that central pressures were about 90 Mb, and central temperatures of the order of 10,000 K. In sharp contrast to Jupiter, which requires large amounts of heavy material in the envelope to match the observed gravitational quadrupole moment, Saturn requires an almost solar envelope. Indeed, the ratio of enhanced material in the envelope to material in the core is less than about 0.1, while the corresponding value for Jupiter is approximately 2.

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