Statistics – Computation
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.1104a&link_type=abstract
American Astronomical Society, DPS meeting #28, #11.04; Bulletin of the American Astronomical Society, Vol. 28, p.1107
Statistics
Computation
Scientific paper
The late stage of solar system formation is characterized by the direct accretion of the planets from hundreds of lunar sized planetesimals. The gravitational interactions between the planetesimals perturb them into crossing orbits resulting in collisions. A gravitational N-body program has been developed to model the final stage of planetary formation. This FORTRAN code integrates the orbits of the planetesimals numerically using a fourth-order Hermite scheme with an individual timestep which is adjusted independently in order to maintain the accuracy of the simulation, and yet minimize the computation time. Previous N-body results are in qualitative agreement with those presented. Six simulations were performed that included a collision and fragmentation model. It was found that fragmentation plays a minimal role in the late stage of planetary formation. Simulations of the formation of the terrestrial planets in the presence of Jupiter are presented. Results indicate that the gas giant planet has a significant effect on the final stage of terrestrial planet development.
Agnor Craig Bruce
Alexander S. G.
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