We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.

Durham Research Online
You are in:

Multiply-deuterated species in prestellar cores.

Flower, D. R. and Pineau des Forêts, G. and Walmsley, C. M. (2004) 'Multiply-deuterated species in prestellar cores.', Astronomy & astrophysics., 427 (3). pp. 887-893.


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.

Item Type:Article
Keywords:Stars, Formation, Astrochemistry, ISM, Clouds.
Full text:(VoR) Version of Record
Download PDF
Publisher Web site:
Publisher statement:Reproduced with permission from Astronomy & Astrophysics, © ESO
Date accepted:No date available
Date deposited:29 May 2008
Date of first online publication:December 2004
Date first made open access:No date available

Save or Share this output

Look up in GoogleScholar