The isotope abundance ratio H2/C-12/O/H2/C-13/O towards the Galactic Center

Details The isotope abundance ratio H2/C-12/O/H2/C-13/O towards the Galactic Center The isotope abundance ratio H2/C-12/O/H2/C-13/O towards the Galactic Center

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199p..23g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 199, Apr. 1982, p. 23P-28P.

Astronomy and Astrophysics

Astronomy

8

Abundance, Carbon Isotopes, Formaldehyde, Milky Way Galaxy, Molecular Clouds, Molecular Spectra, Digital Techniques, Interstellar Matter, Line Spectra, Molecular Energy Levels, Optical Density, Radial Velocity, Radio Telescopes

Scientific paper

Observations of the 5-GHz transitions of H2 13CO and H2 12CO with a 4.6 arcmin beam at 12 positions near the Galactic Centre indicate that the low isotope abundance ratios [H2 12CO] / [H2 13CO] found for the massive molecular clouds near Sgr A and Sgr B2 are not atypical; low values are found for all clouds believed to be located near the nucleus. Large-scale H2 12CO features show well defined ranges of ratio. These vary from 11-19 for the feature nearest Sgr A to 23-55 for the "molecular ring".

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