Numerical Experiments on Planetesimal Aggregation during the Formation of the Solar System
- 1 September 1976
- journal article
- other
- Published by Cambridge University Press (CUP) in Publications of the Astronomical Society of Australia
- Vol. 3 (2) , 169-171
- https://doi.org/10.1017/s1323358000015277
Abstract
A major area of difficulty in the cosmogony of the solar system is understanding how a large number of small planetesimals, which have condensed from the primordial gas, can aggregate into the ordered planetary system present today. Theories involving aggregation within a gaseous disc [e.g. Cameron (1973)] suffer the common difficulty that the particles, once condensed, are no longer supported by the radial gas pressure gradient and spiral rapidly in towards the Sun. Most of the planetesimals are dragged in to the central body in times several orders of magnitude less than would be required for larger bodies to accrete (Goldreich & Ward 1973).Keywords
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