Mathematics – Probability
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979m%26p....20...61k&link_type=abstract
(Conference on Protostars and Planets, Tucson, Ariz., Jan. 3-7, 1978.) Moon and the Planets, vol. 20, Feb. 1979, p. 61-101.
Mathematics
Probability
8
Interstellar Matter, Nebulae, Protostars, Solar System, Stellar Evolution, Chemical Evolution, Galactic Clusters, Gravitational Collapse, Infrared Spectra, Interstellar Chemistry, Interstellar Extinction, Interstellar Radiation, Particle Density (Concentration), Particle Size Distribution, Photochemical Reactions, Polarization (Waves)
Scientific paper
A model for the origin of the solar nebula is developed with attention to the significance of angular momentum considerations. Evidence that stars are born in groups rather than singly is examined. It is shown that protostars which are members of typical galactic clusters have some probability of undergoing a gravitational encounter with another star while they are collapsing. According to the model, these encounters impart disproportionate amounts of angular momentum to the later material to fall in toward already centrally condensed fragments. The amount of central condensation of a fragment is the overriding factor in determining its stability against destruction by tidal forces. The encounter also imparts angular momentum to matter that is still accreting onto the protosun.
Kaula William M.
Kobrick Michael
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