Cyanoacetylene as a density probe of molecular clouds

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/161184· OSTI ID:5599935

Vanden Bout, P A; Loren, R B; Sneill, R L; Wootten, A

Total gas volume densities have been estimated for a sample of 19 molecular clouds from observations of HC/sub 3/N. These density estimates are based on observations of only the J = 5--4 and j = 9--8 transitions for 10 clouds. Better estimates were possible for the nine clouds in which three or more transitions were detected. Isothermal, homogeneous-density models could be fitted to the multi-line data for four clouds; only one cloud (Sgr B2) required a two-component model. The data are consistent with the more elaborate density-gradient models published for the S140 and L1529 coulds.

• Research Organization: Department of Astronomy, University of Texas at Austin
• OSTI ID: 5599935
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 271:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHEMISTRY
COSMIC GASES
COSMOCHEMISTRY
DENSITY
EMISSION
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
INTERSTELLAR GRAINS
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARTICLES
PHYSICAL PROPERTIES
PROPIOLONITRILE