Variations of organic functional chemistry in carbonaceous matter from the asteroid 162173 Ryugu

Bradley De Gregorio (), George D. Cody, Rhonda M. Stroud, A. L. David Kilcoyne, Scott Sandford, Corentin Le Guillou, Larry R. Nittler, Jens Barosch, Hikaru Yabuta, Zita Martins, Yoko Kebukawa, Taiga Okumura, Minako Hashiguchi, Shohei Yamashita, Yasuo Takeichi, Yoshio Takahashi, Daisuke Wakabayashi, Cécile Engrand, Laure Bejach, Lydie Bonal, Eric Quirico, Laurent Remusat, Jean Duprat, Maximilien Verdier-Paoletti, Smail Mostefaoui, Mutsumi Komatsu, Jérémie Mathurin, Alexandre Dazzi, Ariane Deniset-Besseau, Emmanuel Dartois, Yusuke Tamenori, Hiroki Suga, Gilles Montagnac, Kanami Kamide, Miho Shigenaka, Megumi Matsumoto, Yuma Enokido, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Tomohiro Usui, Masanao Abe, Tatsuaki Okada, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe and Yuichi Tsuda
Additional contact information
Bradley De Gregorio: U.S. Naval Research Laboratory
George D. Cody: Carnegie Institution for Science
Rhonda M. Stroud: Arizona State University
A. L. David Kilcoyne: Lawrence Berkeley National Laboratory
Scott Sandford: Moffett Field
Corentin Le Guillou: Université de Lille
Larry R. Nittler: Arizona State University
Jens Barosch: University of Edinburgh
Hikaru Yabuta: Hiroshima University
Zita Martins: Universidade de Lisboa
Yoko Kebukawa: Tokyo Institute of Technology
Taiga Okumura: University of Tokyo
Minako Hashiguchi: Nagoya University
Shohei Yamashita: High Energy Acceleratory Research Organization
Yasuo Takeichi: High Energy Acceleratory Research Organization
Yoshio Takahashi: University of Tokyo
Daisuke Wakabayashi: High Energy Acceleratory Research Organization
Cécile Engrand: Centre National de la Recherche Scientifique
Laure Bejach: Centre National de la Recherche Scientifique
Lydie Bonal: Université Grenoble Alpes
Eric Quirico: Université Grenoble Alpes
Laurent Remusat: Sorbonne Université
Jean Duprat: Sorbonne Université
Maximilien Verdier-Paoletti: Sorbonne Université
Smail Mostefaoui: Sorbonne Université
Mutsumi Komatsu: Saitama Prefectural University
Jérémie Mathurin: Centre National de la Recherche Scientifique
Alexandre Dazzi: Centre National de la Recherche Scientifique
Ariane Deniset-Besseau: Centre National de la Recherche Scientifique
Emmanuel Dartois: Centre National de la Recherche Scientifique
Yusuke Tamenori: Tokyo Metropolitan University
Hiroki Suga: Japan Synchrotron Radiation Research Institute
Gilles Montagnac: University Lyon 1
Kanami Kamide: Hiroshima University
Miho Shigenaka: Hiroshima University
Megumi Matsumoto: Tohoku University
Yuma Enokido: Tohoku University
Makoto Yoshikawa: Japan Aerospace Exploration Agency
Takanao Saiki: Japan Aerospace Exploration Agency
Satoshi Tanaka: Japan Aerospace Exploration Agency
Fuyuto Terui: Kanagawa Institute of Technology
Satoru Nakazawa: Japan Aerospace Exploration Agency
Tomohiro Usui: Japan Aerospace Exploration Agency
Masanao Abe: Japan Aerospace Exploration Agency
Tatsuaki Okada: Japan Aerospace Exploration Agency
Toru Yada: Japan Aerospace Exploration Agency
Masahiro Nishimura: Japan Aerospace Exploration Agency
Aiko Nakato: Japan Aerospace Exploration Agency
Akiko Miyazaki: Japan Aerospace Exploration Agency
Kasumi Yogata: Japan Aerospace Exploration Agency
Hisayoshi Yurimoto: Hokkaido University
Tomoki Nakamura: Tohoku University
Takaaki Noguchi: Kyoto University
Ryuji Okazaki: Kyushu University
Hiroshi Naraoka: Kyushu University
Kanako Sakamoto: Japan Aerospace Exploration Agency
Shogo Tachibana: University of Tokyo
Sei-ichiro Watanabe: Nagoya University
Yuichi Tsuda: Japan Aerospace Exploration Agency

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Primordial carbon delivered to the early earth by asteroids and meteorites provided a diverse source of extraterrestrial organics from pre-existing simple organic compounds, complex solar-irradiated macromolecules, and macromolecules from extended hydrothermal processing. Surface regolith collected by the Hayabusa2 spacecraft from the carbon-rich asteroid 162173 Ryugu present a unique opportunity to untangle the sources and processing history of carbonaceous matter. Here we show carbonaceous grains in Ryugu can be classified into three main populations defined by spectral shape: Highly aromatic (HA), Alkyl-Aromatic (AA), and IOM-like (IL). These carbon populations may be related to primordial chemistry, since C and N isotopic compositions vary between the three groups. Diffuse carbon is occasionally dominated by molecular carbonate preferentially associated with coarse-grained phyllosilicate minerals. Compared to related carbonaceous meteorites, the greater diversity of organic functional chemistry in Ryugu indicate the pristine condition of these asteroid samples.

Date: 2024
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DOI: 10.1038/s41467-024-51731-w

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