Isotope ratios in interstellar formaldehyde from 6 centimeter observations

Journal Article · Mon Mar 15 04:00:00 EST 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159763· OSTI ID:5289780

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

We report observations of 6 cm absorption by H/sub 2/ /sup 13/CO and H/sub 2/C/sup 18/O in Sgr A, Sgr B2, W51, W33, ad Ori B. These provide more accurate isotope ratios than we have previously reported because both isotopes have been observed in the same manner, and the continuum sources were monitored on a regular basis. We find a double ratio, H/sub 2/ /sup 13/CO/H/sub 2/C/sup 18/O, close to the terrestrial value of 5.6 in the galactic plane sources, and enhance to 7.6 in the galactic center sources.

• Research Organization: Physics Department, Rensselaer Polytechnic Institute
• OSTI ID: 5289780
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 254:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ALDEHYDES
CARBON 13
CARBON ISOTOPES
CHEMICAL COMPOSITION
ELECTROMAGNETIC RADIATION
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FORMALDEHYDE
INTERSTELLAR SPACE
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
NEBULAE
NUCLEI
ORGANIC COMPOUNDS
OXYGEN 18
OXYGEN ISOTOPES
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA
STABLE ISOTOPES