Detection of HCO+ towards cygnus OB2No. 12

被引：15
|
作者：
Scappini, F
Cecchi-Pestellini, C
Codella, C
Dalgarno, A
机构：
[1] CNR, Ist Spettroscopia Mol, I-40129 Bologna, Italy
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[3] Univ Florence, Dipartimento Astron & Sci Spazio, I-50125 Florence, Italy
[4] CNR, Ist Fis Spazio Interplanetario, I-00133 Rome, Italy
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2000年 / 317卷 / 01期
关键词：
stars : individual : Cygnus OB2No. 12; ISM : abundances; ISM : clouds; ISM : molecules;
D O I：
10.1046/j.1365-8711.2000.03799.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
HCO+ has been detected for the first time towards the star Cygnus OB2 No. 12 through emission of the 1-0 rotational transition at 89 GHz. The CO(J=2-1) transition has also been observed. The observations are consistent with a model of dense regions embedded in a low-density clump gas. If actually present, the dense component would have an aggregate size L less than or equal to 1300 au, in agreement with estimates of small-scale density fluctuations observed along diffuse lines of sight.
引用
收藏
页码：L6 / L10
页数：5
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