Interstellar solid CO - Polar and nonpolar interstellar ices

Details Interstellar solid CO - Polar and nonpolar interstellar ices Interstellar solid CO - Polar and nonpolar interstellar ices

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...381..181t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 381, Nov. 1, 1991, p. 181-199.

Astronomy and Astrophysics

Astrophysics

258

Carbon Monoxide, Dark Matter, Interstellar Matter, Molecular Clouds, Ice, Infrared Spectra, Pre-Main Sequence Stars

Scientific paper

Observations of the solid-CO lines corresponding to particular protostars are compared with respect to peak position and width and contrasted with the solid CO bands derived experimentally for astrophysical mixtures. Most lines of sight reveal narrow and broad observational solid-CO components; the narrow band appears when nonpolar molecules are dominant. When the concentration of CO is greater than 0.3 the 'surface modes' of the protostars are responsible for the position and shape of the CO fundamental. Some variations of the parameters are related to the composition and/or morphology of the grains particularly at the interstellar 2140/cm line. Grain mantles are theorized to be composed of both a polar and a nonpolar mixtures which reflect the chemical variations associated with accretion.

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