12.2 GHZ CH3OH ABSORPTION IN SOUTHERN MOLECULAR CLOUDS

被引：2

作者：

PENG, R ^{[1
]}

WHITEOAK, JB ^{[1
]}

机构：

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

来源：

PROCEEDINGS ASTRONOMICAL SOCIETY OF AUSTRALIA | 1991年 / 9卷 / 02期

关键词：

D O I：

10.1017/S1323358000024176

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have used the Parkes 64 m telescope to observe the 2(0)--> 3(-1)E absorption of CH3OH at 12.2 GHz towards 58 Galactic H II regions and dark clouds, yielding 38 detections. The results show that CH3OH absorbing clouds have a typical optical depth of 0.25 and a column density of 8.4 x 10(15) cm-2. CH3OH absorption is often accompanied by unsaturated maser emission and is closely associated with background H II regions. CH3OH absorption against the 2.7 K background is also observed in several dark clouds.

引用

页码：287 / 288

页数：2

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