Interstellar HCN, HCO/+/, and the galactic deuterium gradient

Details Interstellar HCN, HCO/+/, and the galactic deuterium gradient Interstellar HCN, HCO/+/, and the galactic deuterium gradient

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..430p&link_type=abstract

Astrophysical Journal, Part 1, vol. 228, Mar. 1, 1979, p. 430-434.

Astronomy and Astrophysics

Astrophysics

35

Abundance, Deuterium, Hydrocarbons, Hydrocyanic Acid, Interstellar Matter, Molecular Ions, Astronomical Models, Big Bang Cosmology, Cations, Galactic Nuclei, Gradients, Radial Distribution

Scientific paper

Two sets of measurements, comparing DCN with H(C-13)N and DCO(+) with HC(O-18)(+), reveal increasing relative abundances of both deuterated species with distance from the center of the Galaxy. This increase is interpreted as reflecting a positive radial gradient in the galactic distribution of the underlying D/H ratio; it thus supports a key prediction of the standard model of the open big-bang universe.

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