Interstellar absorption features toward the compact infrared source W33A

Journal Article · Sun Dec 15 04:00:00 EST 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163754· OSTI ID:5875202

Larson, H P; Davis, D S; Black, J H; Fink, U

A high-resolution (lambda/..delta..lambdaapprox.2000), broad-bandwidth (3.3--5.0 ..mu..m)= spectrum of the compact infrared source W33A is presented. Four absorption features are associated with compositionally distinct components in the interstellar medium: solid-phase C/sub 3/, CN, or CH/sub 3/OH at 4.9 ..mu..m, solid-phase CO and either solid or gaseous CH/sub 3/NC near 4.6 ..mu..m, and the well-known ''dirty ice'' feature near 3 ..mu..m. The analysis of this spectrum supports chemically complex models of grain mantle evolution in cold, quiescent molecular clouds.

• Research Organization: Max-Planck-Institut fuer Physik und Astrophysik, Institut fuer extraterrestrische Physik, 8046 Garching bei Muenchen, Federal Republic of Germany
• OSTI ID: 5875202
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 299:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ABUNDANCE
ALCOHOLS
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMETS
CYANOGEN
ELEMENTS
HYDROCARBONS
HYDROXY COMPOUNDS
INFRARED SPECTRA
INTERSTELLAR GRAINS
LINE WIDTHS
METHANOL
NEBULAE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHOTOCHEMICAL REACTIONS
SPECTRA