| Title: | Precometary organic matter: A hidden reservoir of water inside the snow line |
| Authors: | Nakano, Hideyuki Browse this author |
| Hirakawa, Naoki Browse this author |
| Matsubara, Yasuhiro Browse this author |
| Yamashita, Shigeru Browse this author |
| Okuchi, Takuo Browse this author |
| Asahina, Kenta Browse this author |
| Tanaka, Ryo Browse this author |
| Suzuki, Noriyuki Browse this author |
| Naraoka, Hiroshi Browse this author |
| Takano, Yoshinori Browse this author |
| Tachibana, Shogo Browse this author |
| Hama, Tetsuya Browse this author |
| Oba, Yasuhiro Browse this author |
| Kimura, Yuki Browse this author →KAKEN DB |
| Watanabe, Naoki Browse this author →KAKEN DB |
| Kouchi, Akira Browse this author →KAKEN DB |
| Issue Date: | 8-May-2020 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Scientific reports |
| Volume: | 10 |
| Issue: | 1 |
| Start Page: | 7755 |
| Publisher DOI: | 10.1038/s41598-020-64815-6 |
| Abstract: | 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. |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/79474 |
| 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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