Modelling of deuterium chemistry and its application to molecular clouds

H. Roberts, TJ Millar

Research output: Contribution to journalArticlepeer-review

180 Citations (Scopus)


We have developed new models of the chemistry of deuterium for investigating fractionation in interstellar molecular clouds. We have incorporated the latest information on reactions which affect deuteration, extended previous models to include S-D bonds for the first time and included the gasphase chemistry of some doubly-deuterated species. We present models for a wide range of physical parameters, including density, temperature, elemental abundances, and the freeze out of molecules on to dust grains. We discuss the detailed fractionation of particular species and show how fractionation can be used to probe the history of interstellar matter. The freeze out of molecules onto dust leads to significant enhancement in fractionation ratios and, in particular, to large fractionation in doubly-deuterated species.
Original languageEnglish
Pages (from-to)388-398
Number of pages11
JournalAstronomy and Astrophysics
Issue number1
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics


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