The Rosseland mean opacity of interstellar grain

Details The Rosseland mean opacity of interstellar grain The Rosseland mean opacity of interstellar grain

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rmoi.book.....a&link_type=abstract

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Computation

Ice, Interstellar Matter, Opacity, Silicates, Temperature, Coatings, Coefficients, Graphite, Models

Scientific paper

We have calculated the opacity of interstellar grains in the temperature range 10 K to 1500 K. Two composite grain models have been considered. One of them consists of silicate coated with ice mantle and the second has a graphite core coated also with ice mantle. These models are compared with isolated grain models. An exact analytical and computational development of Guettler's formulae for composite grain models has been used to calculate the extinction coefficient. It has been found that the thickness of the mantle affects the opacity of the interstellar grains. The opacity of composite models differs from that of the isolated models. The effect of the different species (ice, silicate and graphite) is also clear.

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