Magnetic dipole moment estimates for an ancient lunar dynamo

Details Magnetic dipole moment estimates for an ancient lunar dynamo Magnetic dipole moment estimates for an ancient lunar dynamo

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lpsc...13..588a&link_type=abstract

In: Lunar and Planetary Science Conference, 13th, Houston, TX, March 15-19, 1982, Proceedings. Part 2. (A83-21281 07-91) Washing

Physics

2

Dynamo Theory, Lunar Evolution, Lunar Magnetic Fields, Lunar Rocks, Magnetic Moments, Selenology, Field Strength, Lunar Core, Lunar Rotation, Magnetic Dipoles

Scientific paper

The four measured planetary magnetic moments combined with a recent theoretical prediction for dynamo magnetic fields suggests that no dynamo exists in the moon's interior today. For the moon to have had a magnetic moment in the past of sufficient strength to account for at least some of the lunar rock magnetism, the rotation would have been about twenty times faster than it is today and the radius of the fluid, conducting core must have been about 750 km. The argument depends on the validity of the Busse solution to the validity of the MHD problem of planetary dynamos.

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