Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...299..873l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 299, Dec. 15, 1985, p. 873-880.
Astronomy and Astrophysics
Astrophysics
38
Absorption Spectra, Infrared Spectra, Interstellar Matter, Molecular Clouds, Abundance, Astronomical Spectroscopy, High Resolution, Nebulae, Spectrum Analysis
Scientific paper
A high-resolution (λ/Δλ ≡ 2000), broad-bandwidth (3.3 - 5.0 μm) spectrum of the compact infrared source W33 A is presented. Four absorption features are associated with compositionally distinct components in the interstellar medium: solid-phase C3, CN, or CH3OH at 4.9 μm, solid-phase CO and either solid or gaseous CH3NC near 4.6 μm, and the well-known "dirty ice" feature near 3 μm. The analysis of this spectrum supports chemically complex models of grain mantle evolution in cold, quiescent molecular clouds.
Black John Harry
Davis David S.
Fink Uwe
Larson Harold P.
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