Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977psi..reptr....c&link_type=abstract
Semiannual Report Planetary Science Inst., Tucson, AZ.
Astronomy and Astrophysics
Astrophysics
Earth (Planet), Gravitational Effects, Lunar Evolution, Orbital Resonances (Celestial Mechanics), Particle Collisions, Planetary Evolution, Resonance, Algorithms, Cratering, Formations, Planetary Mass, Velocity Distribution, Velocity Modulation
Scientific paper
A simulation of collisional and gravitational interaction in the early solar system generates planets approximately 1000 km in diameter from an initial swarm of kilometer sized planetesimals. The model treats collisions according to experimental and theoretical impact results (such as rebound, cratering, and catastrophic fragmentation) for a variety of materials whose parameters span plausible values for early solid objects. The small planets form in approximately 1000 yr, during which time most of the mass of the system continues to reside in particles near the original size. The simulation is terminated when the largest objects' random motion is of smaller dimension than their collision cross-sections. The few 1000 km planets may act as seeds for the subsequent, gradual, accretional growth into full-sized planets.
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