| Issue |
A&A
Volume 477, Number 3, January III 2008
|
|
|---|---|---|
| Page(s) | L45 - L48 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20078973 | |
| Published online | 04 December 2007 | |
Letter to the Editor
Highly deuterated pre-stellar cores in a high-mass star formation region*
1
INAF - Istituto di Radioastronomia, via Gobetti 101, 40129 Bologna, Italy e-mail: ffontani@ira.inaf.it
2
INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
3
School of Physics and Astrophysics, University of Leeds, Leeds LS2 9JT, UK
4
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS42, Cambridge, MA 02138, USA
Received:
31
October
2007
Accepted:
26
November
2007
Aims.We have observed the deuterated gas in the high-mass star formation region IRAS 05345+3157 at high-angular resolution, in order to determine the morphology and the nature of this gas.
Methods.We have mapped the N2H+ (1–0) line with the Plateau de Bure Interferometer, and the N2D+ (3–2) and N2H+ (3–2) lines with the Submillimeter Array.
Results.We have detected two condensations in N2D+, with masses
of ∼
and ∼9 
and diameters of 0.05 and 0.09 pc,
respectively. The high deuterium fractionation (∼0.1) and
the line parameters of the N2D+ condensations indicate
that they are probably low- to intermediate-mass
pre-stellar cores, even though other scenarios are possible.
Key words: stars: formation / radio lines: ISM / ISM: individual: IRAS 05345+3157 / ISM: molecules
© ESO, 2008
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