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A search for interstellar pyrimidine
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DOI：10.1046/j.1365-8711.2003.06975.x.png)
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摘要
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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.
Keyword:
astrobiology
line : identification
ISM : individual : Orion KL
ISM : individual : Sgr B2(N)
ISM : individual : W51 e1/e2
ISM : molecules
期刊
IF:
4.8
论文数:
7.1W
被引数:
25.0W
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