CO J = 3-2 observations of translucent and high-latitude molecular clouds

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169547· OSTI ID:6104326

Van DDishoeck, E F; Phillips, T G; Black, J H; Gredel, R ^[1]

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1. California Institute of Technology, Pasadena (USA) Steward Observatory, Tucson, AZ (USA) European Southern Observatory, Garching (Germany, F.R.)

Measurements were carried out on the CO J = 3-2 emission line at 345 GHz from a number of translucent and high-latitude molecular clouds, as well as on the J = 2-1 and J = 1-0 lines of both the (C-12)O and (C-13)O. It is shown that the physical conditions in the high-latitude clouds are very similar to those in the translucent clouds. The densities derived from measured (C-12)O 1-0/3-2 ratios were often found to be higher than those based on the C2 excitation, while densities derived from measured 3-2/(C-13)O 1-0 ratios were similar to those based on C2. 70 refs.

• OSTI ID: 6104326
• Journal Information: Astrophysical Journal; (USA), Vol. 366; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
EMISSION SPECTRA
INTERSTELLAR SPACE
CARBON MONOXIDE
DENSITY
ELEMENT ABUNDANCE
MATHEMATICAL MODELS
MOLECULES
SPECTROSCOPY
ABUNDANCE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
FLUIDS
GASES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPACE
SPECTRA
640105* - Astrophysics & Cosmology- Galaxies