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タイトル	en Precometary organic matter: A hidden reservoir of water inside the snow line
作成者	en Nakano, Hideyuki en Hirakawa, Naoki en Matsubara, Yasuhiro en Yamashita, Shigeru en Okuchi, Takuo en Asahina, Kenta en Tanaka, Ryo en Suzuki, Noriyuki en Naraoka, Hiroshi en Takano, Yoshinori en Tachibana, Shogo en Hama, Tetsuya en Oba, Yasuhiro en Kimura, Yuki NRID 1000050449542 en Watanabe, Naoki NRID 1000050271531 en Kouchi, Akira NRID 1000060161866
アクセス権	metadata only access
権利情報	https://creativecommons.org/licenses/by/4.0/ en Creative Commons Attribution 4.0 International
主題	NDC 440
内容注記	Abstract en The origin and evolution of solar system bodies, including water on the Earth, have been discussed based on the assumption that the relevant ingredients were simply silicates and ices. However, large amounts of organic matter have been found in cometary and interplanetary dust, which are recognized as remnants of interstellar/precometary grains. Precometary organic matter may therefore be a potential source of water; however, to date, there have been no experimental investigations into this possibility. Here, we experimentally demonstrate that abundant water and oil are formed via the heating of a precometary-organic-matter analog under conditions appropriate for the parent bodies of meteorites inside the snow line. This implies that H2O ice is not required as the sole source of water on planetary bodies inside the snow line. Further, we can explain the change in the oxidation state of the Earth from an initially reduced state to a final oxidized state. Our study also suggests that petroleum was present in the asteroids and is present in icy satellites and dwarf planets.
出版者	en Nature Publishing Group
日付	Issued2020-05-08
言語	eng
資源タイプ	journal article
出版タイプ	NA
資源識別子	HDL http://hdl.handle.net/2115/79474
関連	isIdenticalTo DOI https://doi.org/10.1038/s41598-020-64815-6
収録誌情報	PISSN 2045-2322 en Scientific reports 巻10 号1 開始ページ7755
コンテンツ更新日時	2023-07-26