Isotopic ratios from 6. 8 centimeter observations of H/sub 2/C/sup 18/O

Journal Article · Thu Feb 01 04:00:00 EST 1979 · Astrophys. J., Lett.; (United States)

DOI:https://doi.org/10.1086/182886· OSTI ID:6464391

Tucker, K D; Kutner, M L; Massano, W

The 6.8 cm transition of H/sub 2/C/sup 18/O has been observed in absorption in the direction os Sgr A, Sgr B2, and W33. The average molecular isotopic abundance ratio (H/sub 2//sup 13/CO)/H/sub 2/C/sup 18/O) for the three sources is 6.9 with no evidence for source-to-source variation. If the oxygen isotopes have the terrestrial abundance and if fractionation in the formation of the formaldehyde isotopic species is not significant, the derived carbon isotope ratio (/sup 12/C)/(/sup 13/C) would be 72.

• Research Organization: Department of Physics, Fordham University
• OSTI ID: 6464391
• Journal Information: Astrophys. J., Lett.; (United States), Journal Name: Astrophys. J., Lett.; (United States) Vol. 227:3; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ALDEHYDES
CARBON ISOTOPES
CHEMICAL COMPOSITION
CHEMISTRY
COSMOCHEMISTRY
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
FORMALDEHYDE
INTERSTELLAR SPACE
ISOTOPE RATIO
ORGANIC COMPOUNDS
OXYGEN ISOTOPES
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA