Mutual relationships between ice mantle and silicate core properties of interstellar grains

Details Mutual relationships between ice mantle and silicate core properties of interstellar grains Mutual relationships between ice mantle and silicate core properties of interstellar grains

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mmsai..49..251b&link_type=abstract

(Società Astronomica Italiana, Conference on Infrared Astronomy, 1st, Lecce, Italy, Sept. 22-24, 1977.) Società Astronomica Ital

Astronomy and Astrophysics

Astronomy

Absorption Spectra, Cosmic Dust, Ice Formation, Interstellar Extinction, Interstellar Matter, Silicates, Cores, H I Regions, Hydrogen Atoms, Optical Properties

Scientific paper

Calculations are presented which show the mutual influence of the emission properties of ice mantles and silicate cores. Experimentally determined optical constants have been used in this work. The results show that the intensity of silicate absorption bands is seriously affected by an ice mantle even for small ratios of the outer and inner radii. Beyond a critical value of this ratio, which depends on the kind of silicate considered as the core, the composite grains behave as pure ice particles. This condition may be reached in dense molecular clouds but not in normal H I regions.

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