Reassigning CI chondrite parent bodies based on reflectance spectroscopy of samples from carbonaceous asteroid Ryugu and meteorites
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- Kana Amano
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Moe Matsuoka
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8567, Japan.
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- Tomoki Nakamura
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Eiichi Kagawa
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Yuri Fujioka
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Sandra M. Potin
- Faculty of Aerospace Engineering, Delft University of Technology, 2629 HS Delft, Netherlands.
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- Takahiro Hiroi
- Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
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- Eri Tatsumi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Ralph E. Milliken
- Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
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- Eric Quirico
- Institut de Planétologie et d’Astrophysique de Grenoble (IPAG), CNRS, Université Grenoble Alpes, Grenoble 38000, France.
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- Pierre Beck
- Institut de Planétologie et d’Astrophysique de Grenoble (IPAG), CNRS, Université Grenoble Alpes, Grenoble 38000, France.
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- Rosario Brunetto
- Institut d’Astrophysique Spatiale, Université Paris-Saclay, CNRS, Orsay 91405, France.
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- Masayuki Uesugi
- Scattering and Imaging Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
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- Yoshio Takahashi
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- Takahiro Kawai
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- Shohei Yamashita
- Department of Materials Structure Science, The Graduate University for Advanced Studies (SOKENDAI), Tsukuba 305-0801, Japan.
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- Yuma Enokido
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Taiga Wada
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Yoshihiro Furukawa
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Michael E. Zolensky
- NASA Johnson Space Center, Houston, TX 77058, USA.
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- Driss Takir
- Jacobs, NASA Johnson Space Center, Houston, TX 77058, USA.
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- Deborah L. Domingue
- Planetary Science Institute, Tucson, AZ 85179, USA.
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- Camilo Jaramillo-Correa
- The Pennsylvania State University, University Park, PA 16802, USA.
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- Faith Vilas
- Planetary Science Institute, Tucson, AZ 85179, USA.
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- Amanda R. Hendrix
- Planetary Science Institute, Tucson, AZ 85179, USA.
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- Mizuha Kikuiri
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Tomoyo Morita
- Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
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- Hisayoshi Yurimoto
- Department of Earth and Planetary Sciences, Hokkaido University, Sapporo 060-0810, Japan.
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- Takaaki Noguchi
- Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.
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- Ryuji Okazaki
- Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.
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- Hikaru Yabuta
- Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
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- Hiroshi Naraoka
- Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.
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- Kanako Sakamoto
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Shogo Tachibana
- Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
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- Toru Yada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Masahiro Nishimura
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Aiko Nakato
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Akiko Miyazaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Kasumi Yogata
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Masanao Abe
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Tatsuaki Okada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Tomohiro Usui
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Makoto Yoshikawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Takanao Saiki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Satoshi Tanaka
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Fuyuto Terui
- Department of Mechanical Engineering, Kanagawa Institute of Technology, Atsugi 243-0292, Japan.
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- Satoru Nakazawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
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- Sei-ichiro Watanabe
- Department of Earth and Environmental Sciences, Nagoya University, Nagoya 464-8601, Japan.
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- Yuichi Tsuda
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
説明
<jats:p>The carbonaceous asteroid Ryugu has been explored by the Hayabusa2 spacecraft to elucidate the actual nature of hydrous asteroids. Laboratory analyses revealed that the samples from Ryugu are comparable to unheated CI carbonaceous chondrites; however, reflectance spectra of Ryugu samples and CIs do not coincide. Here, we demonstrate that Ryugu sample spectra are reproduced by heating Orgueil CI chondrite at 300°C under reducing conditions, which caused dehydration of terrestrial weathering products and reduction of iron in phyllosilicates. Terrestrial weathering of CIs accounts for the spectral differences between Ryugu sample and CIs, which is more severe than space weathering that likely explains those between asteroid Ryugu and the collected samples. Previous assignments of CI chondrite parent bodies, i.e., chemically most primitive objects in the solar system, are based on the spectra of CI chondrites. This study indicates that actual spectra of CI parent bodies are much darker and flatter at ultraviolet to visible wavelengths than the spectra of CI chondrites.</jats:p>
収録刊行物
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- Science Advances
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Science Advances 9 (49), 2023-12-08
American Association for the Advancement of Science (AAAS)