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Schmitt-Kopplin, P. ; Hertkorn, N. ; Harir, M. ; Moritz, F. ; Lucio, M. ; Bonal, L.* ; Quirico, E.* ; Takano, Y.* ; Dworkin, J.P.* ; Naraoka, H.* ; Tachibana, S.* ; Nakamura, T.* ; Noguchi, T.* ; Okazaki, R.* ; Yabuta, H.* ; Yurimoto, H.* ; Sakamoto, K.* ; Yada, T.* ; Nishimura, M.* ; Nakato, A.* ; Miyazaki, A.* ; Yogata, K.* ; Abe, M.* ; Usui, T.* ; Yoshikawa, M.* ; Saiki, T.* ; Tanaka, S.* ; Terui, F.* ; Nakazawa, S.* ; Okada, T.* ; Watanabe, S.i.* ; Tsuda, Y.*

Soluble organic matter molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body.

Nat. Commun. 14:6525 (2023)

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The sample from the near-Earth carbonaceous asteroid (162173) Ryugu is analyzed in the context of carbonaceous meteorites soluble organic matter. The analysis of soluble molecules of samples collected by the Hayabusa2 spacecraft shines light on an extremely high molecular diversity on the C-type asteroid. Sequential solvent extracts of increasing polarity of Ryugu samples are analyzed using mass spectrometry with complementary ionization methods and structural information confirmed by nuclear magnetic resonance spectroscopy. Here we show a continuum in the molecular size and polarity, and no organomagnesium molecules are detected, reflecting a low temperature and water-rich environment on the parent body approving earlier mineralogical and chemical data. High abundance of sulfidic and nitrogen rich compounds as well as high abundance of ammonium ions confirm the water processing. Polycyclic aromatic hydrocarbons are also detected in a structural continuum of carbon saturations and oxidations, implying multiple origins of the observed organic complexity, thus involving generic processes such as earlier carbonization and serpentinization with successive low temperature aqueous alteration.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Amino-acids; Spectroscopy; Chondrites; Diversity

ISSN (print) / ISBN 2041-1723

e-ISSN 2041-1723

Journal Nature Communications

Quellenangaben Volume: 14, Issue: 1, Article Number: 6525

Publisher Nature Publishing Group

Publishing Place London

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit BioGeoChemistry and Analytics (BGC)

Grants NASA - Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)
Japan Society for the Promotion of Science (JSPS) under KAKENHI
ASA (Australian Space Agency)
NASA
CNES (French Space Center)
The Hayabusa2 project has been led by JAXA (Japan Aerospace Exploration Agency) in collaboration with DLR (German Space Center) and CNES (French Space Center), and supported by NASA and ASA (Australian Space Agency). We thank all of the members of the Hay