The discovery of clumpy structure in the diffuse gas towards Cyg OB2No. 12

被引：14

作者：

Scappini, F

Casu, S

Cecchi-Pestellini, C

Olberg, M

机构：

[1] CNR, Ist Studio Mat Nanostrutturati, I-40129 Bologna, Italy

[2] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Italy

[3] Osservatorio Astron Cagliari, I-09012 Capoterra, CA, Italy

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

[5] Onsala Space Observ, S-43900 Onsala, Sweden

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2002年 / 337卷 / 02期

关键词：

stars : individual : Cyg OB2No. 12; ISM : clouds; ISM : molecules;

D O I：

10.1046/j.1365-8711.2002.05928.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have mapped the (CO)-C-13 (1-0) line in a region of sky towards the star Cyg OB2 No. 12. The observations rule out the possibility that the molecular material along the line of sight is distributed over a long path of very dilute gas. Instead, we present unambiguous evidence of well-defined kinematical structures, which might be assembled to form a cloud complex. The chemistry that leads to H-3(+) appears decoupled from that responsible for the production of heavier species.

引用

页码：495 / 498

页数：4

共 18 条

[1] SURVEY OF INTER-STELLAR H-I FROM L-ALPHA ABSORPTION-MEASUREMENTS .2. [J].