Re-evaluating Bode's law of planetary magnetism

Details Re-evaluating Bode's law of planetary magnetism Re-evaluating Bode's law of planetary magnetism

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.272..147r&link_type=abstract

Nature, vol. 272, Mar. 9, 1978, p. 147, 148.

Physics

14

Magnetic Moments, Planetary Magnetic Fields, Angular Momentum, Dipole Moments, Earth-Moon System, Jupiter (Planet), Planets, Magnetic Moments, Magnetic Properties, Earth, Jupiter, Mercury, Venus, Mars, Earth-Moon System

Scientific paper

The paper gives an update of the magnetic Bode's law, consisting of a plot of the log of the magnetic moment of a planet against the log of its angular momentum, the plot being roughly a straight line. In the revised plot, two lines are given, one through the angular momentum value of Jupiter and the earth, and one through the values for Jupiter and the earth-moon system. If a precessional source of energy is assumed for the terrestrial dynamo, the angular momentum of the earth-moon system may be preferrable. The Martian moment relative to earth and Mercury is low, which suggests that there is no scaling law, which ignores the state of the planetary interior, that can be made to fit the data.

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