Physics
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pepi...20...42s&link_type=abstract
Physics of the Earth and Planetary Interiors, vol. 20, Sept. 1979, p. 42-47.
Physics
5
Gravitational Effects, Planetary Cores, Planetary Evolution, Terrestrial Planets, Energy Transfer, Fractionation, Latent Heat, Melting, Moon, Temperature Distribution, Vertical Distribution, Terrestrial Planets, Cores, Formation Of, Gravity, Energy, Models, Melting, Mass, Accretion, Separation, Thermodynamics, Data, Comparisons, Mercury, Planet, Mars, Venus, Earth, Parameters, Heat Of Fusion, Stability, Density, Temperatures
Scientific paper
Calculations of the radial distribution of the energy released in core formation indicate that the cores of all the terrestrial planets may be expected to receive a disproportionate share of the gravitational energy released. It is necessary for a certain amount of core phase to separate and accumulate before the energy released by gravitational settling is sufficient to supply the latent heat of fusion of the core phase. The amount of melting required to reach this point varies according to the total mass of the planet, and mass fraction of core but is not particularly large (less than 5% for the earth and about 37% for the moon). Core separation appears to be a self-sustaining process even for fairly small bodies, provided a small amount of dense potential core phase is present.
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