Physics
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977pepi...15..113c&link_type=abstract
(Lunar Science Institute, Conference on Comparisons of Mercury and the Moon, Houston, Tex., Nov. 15-17, 1976.) Physics of the Ea
Physics
2
Dynamo Theory, Lunar Core, Lunar Magnetic Fields, Mercury (Planet), Planetary Cores, Planetary Magnetic Fields, Chemical Composition, Core Flow, Energy Sources, Heat Transfer, Heat Transmission, Magnetic Properties, Radioactive Isotopes, Temperature Effects
Scientific paper
Various theories regarding lunar and Mercurian magnetic properties are discussed in terms of the thermal evolutions of these bodies. In particular, the extinct dynamo, the primordial field of external origin, local mechanisms, and the active dynamo hypotheses are reviewed. The theory involving magnetization by an internal dynamo is applied to Mercury, noting that it implies the existence of a molten metallic core, or shell. Possible sources of the energy required for core differentiation are discussed, including accretional heating, long-lived radioactive isotopes, and other radioactive heat sources. Thermal processes which might keep the core molten are suggested along with processes permitting the flow of heat through the mantle. Conclusions suggested by the dynamo hypothesis are reviewed in terms of current models of the thermal evolution of Mercury and the moon.
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