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Possible influence of comets on the chemical evolution of the galaxy |
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| Authors: | Beatrice M Tinsley A G W Cameron |
| Institution: | 1. The University of Texas at Dallas, Tex., USA 2. The University of Texas at Austin, Tex., USA 3. Center for Astrophysics, Harvard College Observatory, Cambridge, Mass., USA 4. Smithsonian Astrophysical Observatory, Cambridge, Mass., USA |
| Abstract: | It has been suggested by Cameron that a cloud of comets containing a mass of condensable elements, comparable to the mass of such elements in the sun, formed on the outskirts of the solar system. If the formation of such comet clouds is a general feature of star formation, they constitute a significant sink of elements heavier than helium. It is shown here that this process provides a possible explanation for the very slow rate at which the mean metal abundance of disk stars has increased during the lifetime of the Galaxy. |
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