Understanding asteroid collisional history through experimental and numerical studies

Details Understanding asteroid collisional history through experimental and numerical studies Understanding asteroid collisional history through experimental and numerical studies

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..399d&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 399-402 (SEE N92-10728 01-91)

Physics

Geophysics

Angular Momentum, Asteroids, Computer Programs, Computerized Simulation, Meteorite Collisions, Astronomical Models, Cratering, Meteorite Craters, Size Distribution, Solar System Evolution

Scientific paper

Asteroids can lose angular momentum due to so called splash effect, the analog to the drain effect for cratering impacts. Numerical code with the splash effect incorporated was applied to study the simultaneous evolution of asteroid sized and spins. Results are presented on the spin changes of asteroids due to various physical effects that are incorporated in the described model. The goal was to understand the interplay between the evolution of sizes and spins over a wide and plausible range of model parameters. A single starting population was used both for size distribution and the spin distribution of asteroids and the changes in the spins were calculated over solar system history for different model parameters. It is shown that there is a strong coupling between the size and spin evolution, that the observed relative spindown of asteroids approximately 100 km diameter is likely to be the result of the angular momentum splash effect.

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