Why HOC+ is detectable in interstellar clouds: The rate of the reaction between HOC+ and H2

Eric Herbst, David E. Woon

Research output: Contribution to journalArticlepeer-review

Abstract

The recent confirmation by Ziurys and Apponi of the detection of HOC+ toward Sgr B2 (OH), and their identification of the ion in Orion-KL and several other sources show that HOC+ is far more abundant than predicted by previous ion-molecule models. In these models, the reaction HOC+ + H2 → HCO+ + H2 is assumed to rapidly destroy HOC+, based on the results of a prior calculation. We have recalculated the rate of this reaction as a function of temperature using a new ab initio potential surface and a phase space approach to the dynamics which includes tunneling. The newly calculated rate is small (≤1 × 10-10 cm3 s-1) at temperatures under 100 K.

Original languageEnglish (US)
Pages (from-to)L113-L115
JournalAstrophysical Journal
Volume463
Issue number2 PART II
DOIs
StatePublished - 1996
Externally publishedYes

Keywords

  • ISM: abundances
  • ISM: clouds
  • ISM: molecules
  • Molecular processes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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