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

Journal Article · Tue Nov 01 04:00:00 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), Journal Name: Astrophys. J.; (United States) Vol. 334; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

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