EDP Sciences
Free Access

This article has an erratum: [erratum]

Volume 427, Number 3, December I 2004
Page(s) 887 - 893
Section Interstellar and circumstellar matter
DOI https://doi.org/10.1051/0004-6361:20041464
Published online 16 November 2004

A&A 427, 887-893 (2004)
DOI: 10.1051/0004-6361:20041464

Multiply-deuterated species in prestellar cores

D. R. Flower1, G. Pineau des Forêts2, 3 and C. M. Walmsley4

1  Physics Department, The University, Durham DH1 3LE, UK
2  IAS, Université de Paris-Sud, 92405 Orsay Cedex, France
3  LUTH, Observatoire de Paris, 92195 Meudon Cedex, France
4  INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy

(Received 14 June 2004 / Accepted 5 August 2004)

We have studied the ortho, para, and, in the case of D 3+, meta forms of the multiply-deuterated isotopes of H 3+, 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. 2004), we have calculated the population densities of ortho- and para-D 2H + and of ortho- and meta-D 3+. In the former case, comparison is made with the recent observations of para-D 2H + in the prestellar core 16293E (Vastel et al. 2004). Using radiative transition probabilities computed by Ramanlal & Tennyson (2004), we have predicted the intensities of the near infrared vibrational transitions of the deuterated isotopes of H 3+. Many of these transitions can be observed, in absorption, only from above the Earth's atmosphere, but some might be detectable through atmospheric windows.

Key words: stars: formation -- astrochemistry -- ISM: clouds

SIMBAD Objects

© ESO 2004

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.