Distinction between models of interstellar grains

Krishna Swamy, K. S. ; EO'dell, C. R. (1967) Distinction between models of interstellar grains The Astrophysical Journal, 147 . pp. 937-942. ISSN 0004-637X

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Official URL: http://iopscience.iop.org/0004-637X


A critical study is made of the various grain models. It is shown that the radar-scattering curve can be used effectively in discriminating the various grain models. The theoretical extinction curve for the graphite-core-ice-mantle model is shown to reproduce the observed reddening curve in the interval 7.0 µ-1≤λ-1≤0.47µ-1. On the basis of the existing observational material one can rule out pure iron and an Oort-van de Hulst size distribution of dirty-ice particles as models for interstellar grain. Graphite-core-ice-mantle models generally seem to satisfy all of the existing observations.

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