Enhanced Deuterium Fractionation in Dense Interstellar Cores Resulting from Multiply Deuterated H3+

H. Roberts, E. Herbst, TJ Millar

Research output: Contribution to journalArticlepeer-review

203 Citations (Scopus)

Abstract

In this Letter, we present the first results from updated models of interstellar deuterium chemistry that now include all possible deuterated isotopomers of H3+. We find that in regions of high density and heavy depletion, such as prestellar cores, the inclusion of HD2+ and D3+ enhances the fractionation of ionic and neutral species significantly. Our models are the first to predict the very high atomic D/H ratios (>=0.3) necessary for grain-surface chemistry models to reproduce the high formaldehyde and methanol fractionation seen in star-forming regions.
Original languageEnglish
Pages (from-to)L41-L44
Number of pages4
JournalAstrophysical Journal
Volume591
Issue number1 II
DOIs
Publication statusPublished - Jul 2003

ASJC Scopus subject areas

  • Space and Planetary Science

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