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Showing 1–5 of 5 results
Advanced filters: Author: A. Aléon-Toppani Clear advanced filters

  • The MicrOmega imaging spectrometer performed a first characterization of the sample returned from asteroid Ryugu by Hayabusa2. Compositional homogeneity dominates down to millimetre scales, with signatures of hydrated phases and organics. At the submillimetre scale, NH-rich compounds and alteration products such as carbonates are detected.

    • C. Pilorget
    • T. Okada
    • J.-P. Bibring
    Research
    Nature Astronomy
    Volume: 6, P: 221-225

  • Hydrated ammonium–magnesium–phosphorus-rich grains have been discovered in Ryugu samples. Embedded within an organic-rich phyllosilicate matrix, they may have been a key source of phosphorus and nitrogen in early terrestrial water reservoirs.

    • C. Pilorget
    • D. Baklouti
    • Y. Tsuda
    Research
    Nature Astronomy
    Volume: 8, P: 1529-1535

  • A statistical study of the ~2.7 µm hydration band in the Ryugu samples shows that Ryugu’s immediate subsurface has not been exposed to space weathering and that even the pristine CI chondrites exhibit terrestrial contamination, making the Hayabusa2 samples a reference for primitive water abundance in carbonaceous asteroids.

    • T. Le Pivert-Jolivet
    • R. Brunetto
    • S. Watanabe
    Research
    Nature Astronomy
    Volume: 7, P: 1445-1453

  • MicrOmega characterized the population of carbonates detected in the bulk components and in individual grains of the Ryugu returned samples. Two main carbonate families are detected, which were likely formed via two distinct processes at different stages in the early Solar System.

    • D. Loizeau
    • C. Pilorget
    • S. Watanabe
    Research
    Nature Astronomy
    Volume: 7, P: 391-397

  • The hydrogen isotopic composition of the oldest Solar System rocks demonstrates that a gaseous reservoir of terrestrial isotopic composition existed as early as the onset of Solar System formation and coexisted with the solar gas.

    • J. Aléon
    • D. Lévy
    • F. Brisset
    Research
    Nature Astronomy
    Volume: 6, P: 458-463