A Search for Interstellar Pyrimidine

2); (2) ASIAA; (3) NASA Ames; (4) Polish Academy of Sciences; Chi-Hung Yan (1); Hui-Chun Huang (1) ((1) National Taiwan Normal University; Pascale Ehrenfreund (5); Poland (5) Leiden Observatory; Steven B. Charnley (3); Taiwan

arxiv: astro-ph/0308116 · v1 · submitted 2003-08-07 · 🌌 astro-ph

A Search for Interstellar Pyrimidine

Yi-Jehng Kuan (1 , 2) , Chi-Hung Yan (1) , Steven B. Charnley (3) , Zbigniew Kisiel (4) , Pascale Ehrenfreund (5) , Hui-Chun Huang (1) ((1) National Taiwan Normal University , (2) ASIAA

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Taiwan (3) NASA Ames (4) Polish Academy of Sciences Poland (5) Leiden Observatory the Netherlands)

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keywords pyrimidineinterstellarlimitsupperabundancesacidassociatedbeam-averaged

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We have searched three hot molecular cores for submillimeter 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 1.7E+14 cm^{-2}, 2.4E+14 cm^{-2} and 3.4E+14 cm^{-2}, respectively. The associated upper limits to the pyrimidine fractional abundances lie in the range (0.3-3)E-10. Implications of this result for interstellar organic chemistry, and for the prospects of detecting nitrogen heterocycles in general, are briefly discussed.

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A Search for Interstellar Pyrimidine

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