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Dynamical interactions of the solar system with massive nebulae

Published online by Cambridge University Press:  12 April 2016

W.M. Napier
W.M. Napier*
Affiliation:
Royal Observatory, Edinburgh, U.K.

Abstract

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The effects of encounters with massive nebulae on the long-period comet population are examined, paying particular attention to the uncertainties in the data. An earlier conclusion, that the long-period comet system is dynamically unstable, is upheld. Whether replenishment by unbinding from a dense inner comet cloud is a viable hypothesis awaits detailed modelling, but a qualitative discussion is given which argues tentatively against it. If comets occur in molecular clouds, however, their capture into temporarily bound Solar System orbits is a natural consequence of close encounters for realistic velocities and potentials. A large disturbance or capture may have occurred a few Myr ago as the Sun emerged from the Orion spiral arm.

Type
Section I. Origin of Comets
Information
International Astronomical Union Colloquium , Volume 83: Dynamics of Comets: Their Origin and Evolution , 1985 , pp. 31 - 41
Copyright
Copyright © Cambridge University Press 1985

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