Highly deuterated pre-stellar cores in a high-mass star formation region

Details Highly deuterated pre-stellar cores in a high-mass star formation region Highly deuterated pre-stellar cores in a high-mass star formation region

2007-11-27

arxiv.org/abs/0711.4216v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20078973

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 such gas. 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. The N2D+ (3-2) integrated emission is concentrated in two condensations, with masses of 2-3 and 9 M_sun and diameters of 0.05 and 0.09 pc, respectively. The high deuterium fractionation (0.1) and the line parameters in the N2D+ condensations indicate that they are likely low- to intermediate-mass pre-stellar cores, even though other scenarios are possible.

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