Tidal evolution of inclinations and rotations of celestial bodies

Details Tidal evolution of inclinations and rotations of celestial bodies Tidal evolution of inclinations and rotations of celestial bodies

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981cemec..23..371b&link_type=abstract

Celestial Mechanics, vol. 23, Apr. 1981, p. 371-382.

Computer Science

4

Angular Velocity, Attitude (Inclination), Celestial Bodies, Planetary Evolution, Planetary Rotation, Protoplanets, Tides, Body Kinematics, Celestial Mechanics, Compressing, Cosmology, Rotating Bodies, Planets, Celestial Mechanics, Tidal Effects, Inclination, Rotation, Protoplanets, Evolution, Sizes, Compression

Scientific paper

The role of tidal effects in the evolution of planetary rotation and inclinations is analyzed. An expression is derived for the moment of the tidal forces acting on a celestial body which indicates that the tidal moment varies in proportion to the fifth power of the planet radius. Characteristic evolution times for the evolution of planetary angular velocity and inclination are then calculated for the present earth and Jupiter, and for the corresponding protoplanets within the framework of the cosmogonic theory of Eneev and Kozlov (1977, 1979), in which the evolution of a protoplanetary cloud resulted in protoplanets of enormous initial size and low densities. Tidal evolution is thus shown to have effected the inclinations of planetary axes, rotation rates and senses to a much greater degree early in planetary evolution. Planetary compression effects are then invoked to explain the variety of observed angular velocities and inclinations not accounted for by tidal evolution.

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