Physics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70..303a&link_type=abstract
Icarus (ISSN 0019-1035), vol. 70, May 1987, p. 303-318.
Physics
17
Planetary Atmospheres, Planetary Evolution, Protoplanets, Dimensional Stability, Planetary Orbits, Roche Limit, Planets, Planetesimals, Models, Accretion, Gravity Effects, Trapping, Perturbations, Time Dependency, Numerical Methods, Simulations, Disk, Roche Limit, Evolution, Time Scale, Mass, Density, Distance, Gases, Parameters, Core, Geometry, Stability, Calculations, Orbits, Origin, Structure, Dynamics, Formation
Scientific paper
The author presents a model of the self-regulating growth of a single protoplanet in the planetesimal disk. Accretion of disk material onto the protoplanet is driven by the protoplanet's gravitational perturbations and the trapping of planetesimals within its Roche lobe, due to protoplanet's extended primordial atmosphere and/or protosatellite disk. The author formulates and solves the explicitly time-dependent equations of planet growth. By applying the model to the problem of gas accretion onto the core of Jupiter he predicts the substantial reduction of the accretion rate after it achieves about one-half of its present mass. He presents also the geometry of Hill-stable disk regions near the protoplanet and the numerical determination of time scales for the clearing of a gap out to 2×31/2 Roche lobe radii around the fixed mass protoplanet.
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