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Multiply-deuterated species in prestellar cores

Flower, D.R.; Pineau des Forêts, G.; Walmsley, C.M.

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D.R. Flower

G. Pineau des Forêts

C.M. Walmsley


We have studied the ortho, para, and, in the case of D3+, meta forms of the multiply-deuterated isotopes of H3+, under physical conditions believed to be appropriate to pre-protostellar cores. As deuterons have integral nuclear spin, I = 1, Bose-Einstein statistical laws apply. Having extended the network of chemical reactions used in our previous study (Walmsley et al. \cite{walmsley04}), we have calculated the population densities of ortho- and para-D2H+ and of ortho- and meta-D3+. In the former case, comparison is made with the recent observations of para-D2H+ in the prestellar core 16293E (Vastel et al. \cite{vastel04}). Using radiative transition probabilities computed by Ramanlal & Tennyson (\cite{ramanlal04}), we have predicted the intensities of the near infrared vibrational transitions of the deuterated isotopes of H3+. Many of these transitions can be observed, in absorption, only from above the Earth's atmosphere, but some might be detectable through atmospheric windows.


Flower, D., Pineau des Forêts, G., & Walmsley, C. (2004). Multiply-deuterated species in prestellar cores. Astronomy & Astrophysics, 427(3), 887-893.

Journal Article Type Article
Publication Date Dec 1, 2004
Deposit Date May 29, 2008
Publicly Available Date May 29, 2008
Journal Astronomy and astrophysics.
Print ISSN 0004-6361
Electronic ISSN 1432-0746
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 427
Issue 3
Pages 887-893
Keywords Stars, Formation, Astrochemistry, ISM, Clouds.


Published Journal Article (289 Kb)

Copyright Statement
Reproduced with permission from Astronomy & Astrophysics, © ESO

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