Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..433w&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 433-435 (SEE N92-10728 01-91)
Physics
Geophysics
Accretion Disks, Astronomical Models, Computer Programs, Computerized Simulation, Planetary Evolution, Planets, Protoplanets, Solar System, Eccentric Orbits, Gas Giant Planets, Inclination, Monte Carlo Method, Orbit Calculation, Orbital Elements, Planetary Cores, Size Distribution, Terrestrial Planets
Scientific paper
We use a combination of analytical and numerical methods to study dynamical processes involved in the formation of planets and smaller bodies in the solar system. Our goal was to identify and understand critical processes and to link them in a numerical model of planetesimal accretion. We study effects of these processes by applying them in the context of the standard model of solar system formation, which involves accretion of the terrestrial planets and cores of the giant planet from small planetesimals. The principal focus of our research effort is the numerical simulation of accretion of a swarm of planetesimals into bodies of planetary size. Our computer code uses a Monte Carlo method to determine collisional interactions within the swarm. These interactions are not determined simply by a relative velocity, but rather by explicit distributions of keplerian orbital elements. The planetesimal swarm is divided into a number of zones in semimajor axis, which are allowed to interact. The present version of our code has the capability of following detailed distributions of size, eccentricity, and inclination in each zone.
Davis Donald R.
Weidenschilling Stuart J.
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