Statistics – Computation
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...64..139s&link_type=abstract
Icarus (ISSN 0019-1035), vol. 64, Oct. 1985, p. 139-152. Research supported by the Institut National d'Astronomie et Geophysique
Statistics
Computation
11
Celestial Mechanics, Drag, Gravitational Effects, Planetary Evolution, Protoplanets, Solar System, Collisions, Computational Astrophysics, Gas Dynamics, Mass Distribution, Perturbation Theory, Probability Density Functions, Two Body Problem, Planets, Gases, Drag, Aerodynamics, Formation, Accretion, Experiments, Calculations, Collisions, Gravity Properties, Interactions, Solar System, Dynamics, Evolution, Planetesimals, Statistical Analysis, Distribution, Mass, Velocity, Simulations, Distance, Terrestrial Pl
Scientific paper
Several numerical experiments concerning the collisional and gravitational interaction of a planetesimal swarm in the early solar system are presented. The experiments simulate the accretional growth of numerous planetesimals in the absence (or presence) of gaseous drag, with (or without) one larger embryo among them, and with (or without) a size gradient. It is shown that, for a population of planetesimals subjected to a negative gradient in size as the heliocentric distance increases, the outer planetesimals spiral toward the sun faster than the inner ones; this leads after some time to an accumulation of bodies inside the cloud, allowing the formation of an embryo. In addition, it is found that the growth of one embryo among a population of planetesimals is accelerated by the presence of gas, and is warranted as long as its feeding zone is fed by the inward flow of planetesimals due to gaseous drag.
Cazenave Anny
Lago Bernard
Spaute Dominique
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