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Nucleobase synthesis in interstellar ices

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Title: Nucleobase synthesis in interstellar ices
Authors: Oba, Yasuhiro Browse this author
Takano, Yoshinori Browse this author
Naraoka, Hiroshi Browse this author
Watanabe, Naoki Browse this author →KAKEN DB
Kouchi, Akira Browse this author →KAKEN DB
Issue Date: 27-Sep-2019
Publisher: Nature Publishing Group
Journal Title: Nature communications
Volume: 10
Start Page: 4413
Publisher DOI: 10.1038/s41467-019-12404-1
Abstract: The synthesis of nucleobases in natural environments, especially in interstellar molecular clouds, is the focus of a long-standing debate regarding prebiotic chemical evolution. Here we report the simultaneous detection of all three pyrimidine (cytosine, uracil and thymine) and three purine nucleobases (adenine, xanthine and hypoxanthine) in interstellar ice analogues composed of simple molecules including H2O, CO, NH3 and CH3OH after exposure to ultraviolet photons followed by thermal processes, that is, in conditions that simulate the chemical processes accompanying star formation from molecular clouds. Photolysis of primitive gas molecules at 10 K might be one of the key steps in the production of nucleobases. The present results strongly suggest that the evolution from molecular clouds to stars and planets provides a suitable environment for nucleobase synthesis in space.
Rights: https://creativecommons.org/licenses/by/4.0
Type: article
URI: http://hdl.handle.net/2115/76049
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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