Physics – Plasma Physics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978m%26p....18..325f&link_type=abstract
Moon and the Planets, vol. 18, May 1978, p. 325, 326. Research supported by Rice University;
Physics
Plasma Physics
Galilean Satellites, Jupiter (Planet), Planetary Evolution, Planetary Magnetic Fields, Astronomical Models, Distance, Magnetic Dipoles, Plasma Physics
Scientific paper
Alfven and Arrhenius (1974, 1976) have proposed that satellites may be formed by the condensation of plasma in partial corrotation in the dipole magnetic field of the central body. They conclude that the final orbit distance of the condensed material will be two-thirds of the orbit distance of the plasma. Since the Jovian field is strongly distorted beyond about 40 Jupiter radii, it is expected (assuming that plasma and magnetic field conditions have not changed significantly with time) that the first Galilean satellites would appear at about two-thirds 40 Jupiter radii or about 27 Jupiter radii. In fact Callisto, the outermost Galilean satellite, is found at 26.47 Jupiter radii. This generally supports the Alfven-Arrhenius hypothesis that the central-body dipolar magnetic field plays a role in major satellite formation and, more, specifically, that the two-thirds law has validity.
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