A SURVEY OF 12-GHZ METHANOL ABSORPTION IN SOUTHERN MOLECULAR CLOUDS

被引：21

作者：

PENG, RS ^{[1
]}

WHITEOAK, JB ^{[1
]}

机构：

[1] CSIRO,AUSTRALIA TELESCOPE NATL FACIL,EPPING,NSW 2121,AUSTRALIA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1992年 / 254卷 / 02期

关键词：

D O I：

10.1093/mnras/254.2.301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

58 southern molecular clouds were searched for CH3OH absorption at 12.2 GHz, yielding 38 detections. The absorption has a median brightness temperature of 0.22 K, linewidth of 4.2 km s-1, and velocity offset of 2.7 km s-1 from the velocity of the H II region towards which the absorption occurs. Statistical methods yield an average peak optical depth of 0.21, and an associated CH3OH column density of 3 x 10(15) cm-2. The results indicate that the absorption generally arises in the cores of molecular cloud/H II region complexes.

引用

页码：301 / 305

页数：5

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