The Abundance of H_2D(+) Ions in Cold Clouds

Details The Abundance of H_2D(+) Ions in Cold Clouds The Abundance of H_2D(+) Ions in Cold Clouds

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.6104o&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #61.04; Bulletin of the American Astronomical Society, Vol. 25, p.899

Astronomy and Astrophysics

Astronomy

Scientific paper

A steady--state chemistry of H_2D(+) is considered for interstellar dense clouds having temperatures in the range 10--30 K. It is shown that the observational data of HCO(+) and DCO(+) ions can be used to derive upper and lower bounds on the abundances of H_3 (+) and H_2D(+) , and on the deuterium-- hydrogen cosmic abundance ratio. These data also yield lower bounds on the cosmic--ray ionization rate.

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