The geomagnetic dynamos of the moon and Venus - Comparisons with a recent scaling law

Details The geomagnetic dynamos of the moon and Venus - Comparisons with a recent scaling law The geomagnetic dynamos of the moon and Venus - Comparisons with a recent scaling law

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.3343r&link_type=abstract

In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 3. (A77-34651 15-91) New York, Pergamon

Physics

3

Dynamo Theory, Lunar Evolution, Lunar Magnetic Fields, Paleomagnetism, Venus (Planet), Magnetic Moments, Planetary Magnetic Fields, Scaling Laws, Selenology

Scientific paper

The evidence for the existence of an ancient lunar dynamo is reviewed along with the data on the magnetic field of Venus. These facts are then discussed in terms of Dolginov's scaling law for predicting magnetic moment of planets with a precession-driven dynamo. The precessional dynamo mechanism of Dolginov comes close to predicting the inferred magnetic moment of Venus, but this is viewed as a coincidence, for the Dolginov scaling law is based on an ad hoc force balance for which little justification is given. It assumes that the interiors of the planets have similar densities, conductivities, and precessional characteristics, whereas they clearly do not.

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