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Chemical Fractionation in Gas Rings and the Formation of the Solar System

Published online by Cambridge University Press:  25 April 2016

A. J. R. Prentice
A. J. R. Prentice*
Affiliation:
Department of Mathematics, Monash University, Clayton, Vic 3168
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Abstract

The anomalously high density of the planet Mercury and the higher-than-solar rock-to-ice ratio in Jupiter’s moons Ganymede and Callisto cannot be explained by the conventional disc models of solar system formation. It is shown here that the unusual chemical signature of these bodies is the outcome of a process of chemical fractionation and orbital focussing which is peculiar to gas ring models of planet and regular satellite formation. Good numerical agreement with the observational data is obtained if the temperature of condensation of the planetary system closely followed the law Tn ≃ 680[R⊕/Rn]0.9 K, where Rn denotes the radial distance from the Sun.

Type
Solar & Solar System
Information
Publications of the Astronomical Society of Australia , Volume 9 , Issue 2 , 1991 , pp. 321 - 323
Copyright
Copyright © Astronomical Society of Australia 1991

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