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

H. Roberts, E. Herbst, TJ Millar

Research output: Contribution to journalArticle

199 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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