Grain carriers of isotopic anomalies |
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| Authors: | Steven H Margolis Sydney W Falk Jr |
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| Institution: | (1) Enrico Fermi Institute, University of Chicago, Chicago, Illinois, U.S.A.;(2) Present address: Princeton University Observatory, Princeton, N.J., U.S.A.;(3) Present address: Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX, U.S.A. |
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| Abstract: | The dynamics of grain motion through gas are examined in terms of the injection of isotopically anomalous (compared to solar abundances) material into the early solar nebula. Calculations indicate that the injected grains cannot penetrate to the center of any of a range of reasonable configurations, suggesting the formation of an edge region enriched in injected material. Furthermore, the dynamical behavior of grains in turbulent flows indicates that pockets of grains can have some resistance to turbulent diffusion. The constraints developed here are used to delineate a set of consistent, injected-grain models for the origin of the isotopic anomalies in meteorite inclusions.Invited contribution to the Proceedings of a Workshop onThermodynamics and Kinetics of Dust Formation in the Space Medium held at the Lunar and Planetary Institute, Houston, 6–8 September, 1978. |
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