SIMBAD references

2000A&A...364..780R - Astronomy and Astrophysics, volume 364, 780-784 (2000/12-2)

Gas-phase formation of doubly-deuterated species.


Abstract (from CDS):

We present the first results from a time-dependent chemical model to include a gas-phase reaction scheme for producing doubly-deuterated species. Under normal conditions the formation of these species is inefficient. However, when the effects of the freeze out of gas phase species onto grains is included in the chemistry we find that the fractionation of both singly and doubly deuterated species is enhanced. We compare the predictions from our models with recent observations of deuterated molecules in L134N and find that, contrary to previous expectations, we can reproduce the observed levels of fractionation without recourse to an active grain-surface chemistry.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: molecules - ISM: clouds - ISM: individual objects: L134N

CDS comments: IRAS 16293 = IRAS 16293-2422

Simbad objects: 4

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