Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...51..133c&link_type=abstract
Icarus, vol. 51, July 1982, p. 133-148. Research supported by the Centre National d'Etudes Spatiales and Institut National d'As
Astronomy and Astrophysics
Astronomy
19
Astronomical Models, Gravitational Collapse, Planetary Evolution, Protoplanets, Angular Momentum, Collisions, Dynamic Models, Eccentricity, Many Body Problem, Mass Distribution, Planetary Gravitation, Planetary Mass, Solar System, Three Dimensional Models, Velocity Distribution
Scientific paper
A small number of moon-sized protoplanets of different masses, moving around the sun, are considered by a three-dimensional numerical model whose goal is the study of limited dynamical problems relevant to the latest stage of planet growth in the accretion theory, in view of mutual gravitational perturbations, accretion, and collisional fragmentation processes. Gravitational encounters are treated exactly by numerical integration of the n-body problem, and collisional fragmentation outcomes are modelled as in Greenberg et al. (1978). The 25 protoplanets invoked have a uniform mass distribution in the 2 x 10 to the 25th-4 x 10 to the 26th g range, and are on heliocentric orbits in the earth zone. The bodies are initially confined to a small volume of space to permit gravitational perturbations by close approaches and collisions within a finite length of integration time, and the dynamical evolution of the swarm is followed for four different sets of initial ranges in semimajor axis, eccentricity, and inclination.
Cazenave Anny
Dominh Kien
Lago Bernard
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