Gas phase production of NHD2 in L134N

Details Gas phase production of NHD2 in L134N Gas phase production of NHD2 in L134N

2001-04-25

arxiv.org/abs/astro-ph/0104415v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, uses psfig.sty and emulateapj.sty, to appear in Astrophysical Journal, vol 553

Scientific paper

10.1086/320987

We show analytically that large abundances of NH2D and NHD2 can be produced by gas phase chemistry in the interiors of cold dense clouds. The calculated fractionation ratios are in good agreement with the values that have been previously determined in L134N and suggest that triply-deuterated ammonia could be detectable in dark clouds. Grain surface reactions may lead to similar NH2D and NHD2 enhancements but, we argue, are unlikely to contribute to the deuteration observed in L134N.

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