OBSERVATIONS OF INTER-STELLAR [(H2CO)-C-13]-[(H2CO)-O-18] ABUNDANCE RATIOS

被引：11
|
作者：
GARDNER, FF
WHITEOAK, JB
机构：
[1] Division of Radiophysics, CSIRO, PO Box 76, Epping,NSW,2121, Australia
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1981年 / 194卷 / 03期
关键词：
D O I：
10.1093/mnras/194.1.37P
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The 4388-MHz transition of H2C18O and the 4593-MHz transi- tion of H213CO have been measured in 10 molecular clouds. The median value of the [H213CO]/[H2C18O] abundance ratio (7.7) is higher than values obtained in other studies. The mean value for the three cases near the Galactic Centre (10.5 ± 0.6) is 50 per cent higher than the value outside the centre (7.0±0.5), which is closer to the terrestrial value of 5.5 for the [13C/12C]/ [180/160] abundance ratio. © Royal Astronomical Society.
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页码：P37 / P41
页数：5
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