Constraints on the origin of the solar system by the asteroid population

Details Constraints on the origin of the solar system by the asteroid population Constraints on the origin of the solar system by the asteroid population

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..571b&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 8, Sept. 1990, p. 571-578.

Physics

Asteroids, Gravitational Effects, Planetary Evolution, Protoplanets, Solar System, Galileo Project, Jupiter (Planet), Meteorites, Nebulae, Planetary Composition, Terrestrial Planets

Scientific paper

Asteroids are believed to be remnant planetesimals from the crucial period of planetary formation. They are located in the transition region separating the terrestrial planets from the Jovian ones, where the planetary formation process interrupted at the intermediate stage owing to an unknown mechanism, probably associated to the gravitational influence of the massive proto-Jupiter. Asteroid eccentricities and inclinations were pumped up, thereby increasing collision velocities and transforming the accretion among planetesimal into collisional destruction and erosion. Impacts have altered sizes, physical structures, rotation rates and spin axis directions of most of the asteroids over the course of solar system history; however, the magnitude of these changes is not yet well understood. Asteroids constituted of essentially unalterated primitive material preserve important information about the chemical composition and the environmental condition of the protoplanetary nebula and the processes that produced the planetary bodies. The knowledge of these small bodes has considerably improved over the last twenty years, by means of earth-based observations. The current knowledge on the nature of the asteroid population and the related constraints on the solar system formation is discussed.

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