Observations of the C-13 isomers of cyanoacetylene - implications for carbon isotope studies in the Milky Way

Journal Article · Tue Nov 01 00:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166828· OSTI ID:6438604

Mangum, J G; Rood, R T; Wadiak, E J; Wilson, T L

Observations of the J = 1 to 0 rotational transitions of HC3N, H(C-13)CCN, HC(C-13)CN, and HCC(C-13)N in the Galactic molecular cloud Sgr B2 have been analyzed. No evidence for fractionation is found in the three C-13 isomers. The results support the suggestion that the HC3N J = 1 to 0 transition is a weak maser in Sgr B2. A C-12/C-13 ratio of 11 + or - 2 is obtained for Sgr B2. 31 references.

• Research Organization: National Radio Astronomy Observatory, Charlottesville, VA (USA); Max-Planck-Institut fuer Radioastronomie, Bonn (Germany, F.R.); Navy, E. O. Hulbert Center for Space Research, Washington, DC (USA)
• OSTI ID: 6438604
• Journal Information: Astrophys. J.; (United States), Vol. 334
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
INTERSTELLAR SPACE
CHEMICAL COMPOSITION
MILKY WAY
PROPIOLONITRILE
COSMOCHEMISTRY
ABUNDANCE
CARBON 13
CARBON ISOTOPES
ISOMERS
ISOTOPE RATIO
MASERS
AMPLIFIERS
CHEMISTRY
ELECTRONIC EQUIPMENT
EQUIPMENT
EVEN-ODD NUCLEI
GALAXIES
ISOTOPES
LIGHT NUCLEI
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
NITRILES
NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
SPACE
STABLE ISOTOPES
640105* - Astrophysics & Cosmology- Galaxies