Multiply-deuterated species in prestellar cores

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

Abstract

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.

Citation

Flower, D., Pineau des Forêts, G., & Walmsley, C. (2004). Multiply-deuterated species in prestellar cores. Astronomy & Astrophysics, 427(3), 887-893. https://doi.org/10.1051/0004-6361%3A20041464

• 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
• DOI: https://doi.org/10.1051/0004-6361%3A20041464
• Keywords: Stars, Formation, Astrochemistry, ISM, Clouds.
• Public URL: https://durham-repository.worktribe.com/output/1593888