A search for interstellar pyrimidine

被引：74
作者：
Kuan, YJ [1 ]
Yan, CH
Charnley, SB
Kisiel, Z
Ehrenfreund, P
Huang, HC
机构：
[1] Natl Taiwan Normal Univ, Dept Earth Sci, Taipei 116, Taiwan
[2] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan
[3] NASA, Div Space Sci, Ames Res Ctr, Moffett Field, CA 94035 USA
[4] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[5] Leiden Observ, NL-2300 RA Leiden, Netherlands
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 345卷 / 02期
关键词：
astrobiology; line : identification; ISM : individual : Orion KL; ISM : individual : Sgr B2(N); ISM : individual : W51 e1/e2; ISM : molecules;
D O I：
10.1046/j.1365-8711.2003.06975.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have searched three hot molecular cores for submillimetre emission from the nucleic acid building block pyrimidine. We obtain upper limits to the total pyrimidine (beam-averaged) column densities towards Sgr B2(N), Orion KL and W51 e1/e2 of 1.7 x 10(14), 2.4 x 10(14) and 3.4 x 10(14) cm(-2), respectively. The associated upper limits to the pyrimidine fractional abundances lie in the range (0.3-3) x 10(-10). Implications of this result for interstellar organic chemistry, and for the prospects of detecting nitrogen heterocycles in general, are discussed briefly.
引用
收藏
页码：650 / 656
页数：7
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