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

被引：22

作者：

Fontani, F. ^{[1
]}

Caselli, P. ^{[2
,3
]}

Bourke, T. L. ^{[4
]}

Cesaroni, R. ^{[2
]}

Brand, J. ^{[1
]}

机构：

[1] INAF, Ist Radioastron, I-40129 Bologna, Italy

[2] INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy

[3] Univ Leeds, Sch Phys & Astrophys, Leeds LS2 9JT, W Yorkshire, England

[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 477卷 / 03期

基金：

英国科学技术设施理事会;

关键词：

stars : formation; radio lines : ISM; ISM : individual : IRAS 05345+3157; ISM : molecules;

D O I：

10.1051/0004-6361:20078973

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 2-3 and similar to 9 M-circle dot and diameters of 0.05 and 0.09 pc, respectively. The high deuterium fractionation (similar to 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.

引用

页码：L45 / L48

页数：4

共 20 条

[1] The initial conditions of star formation in the Ophiuchus main cloud:: Kinematics of the protocluster condensations [J].