Laboratory measurements of the abundance ratio (HCO+)/((HOC+) and their astrophysical implications

Details Laboratory measurements of the abundance ratio (HCO+)/((HOC+) and their astrophysical implications Laboratory measurements of the abundance ratio (HCO+)/((HOC+) and their astrophysical implications

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..373a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 1, 1988, p. 373-379.

Astronomy and Astrophysics

Astrophysics

4

Abundance, Astrophysics, Cosmochemistry, Formyl Ions, Interstellar Matter, Molecular Ions, Absorption Spectra, Carbon Monoxide, Gas Mixtures, Hollow Cathodes, Hydrogen

Scientific paper

The relative intensity of the infrared absorption lines of HCO+ and HOC+ was measured as a function of the pressures of CO and H2. Under laboratory conditions, the isomerization process by CO was found to be a dominant depletion process of HOC+. A ratio of about 220 was obtained under the most favorable reaction conditions for production of HOC+. Although the rate constant of the catalytic isomerization of HOC+ by H2 is smaller than that of the isomerization reaction by CO by about an order of magnitude, the catalytic isomerization is the main depletion process of HOC+ in dense dark clouds. The estimated rate constants derived here give an estimated abundance ratio (HCO+)/(HOC+) of 10 million. These results imply that the dissociative recombination rate of H3+ is similar to that of most recombination processes.

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