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A primordial noble gas component discovered in the Ryugu asteroid and its implications

Author

Listed:
  • Alexander B. Verchovsky

    (The Open University)

  • Feargus A. J. Abernethy

    (The Open University)

  • Mahesh Anand

    (The Open University)

  • Ian A. Franchi

    (The Open University)

  • Monica M. Grady

    (The Open University)

  • Richard C. Greenwood

    (The Open University)

  • Simeon J. Barber

    (The Open University)

  • Martin Suttle

    (The Open University)

  • Motoo Ito

    (Kochi Institute for Core Sample Research, X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku
    Nankoku)

  • Naotaka Tomioka

    (Kochi Institute for Core Sample Research, X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku)

  • Masayuki Uesugi

    (Japan Synchrotron Radiation Research Institute (JASRI/SPring-8))

  • Akira Yamaguchi

    (National Institute of Polar Research (NIPR))

  • Makoto Kimura

    (Kanagawa University)

  • Naoya Imae

    (Institute for Molecular Science)

  • Naoki Shirai

    (High Energy Accelerator Research Organization)

  • Takuji Ohigashi

    (Institute for Molecular Science
    High Energy Accelerator Research Organization)

  • Ming-Chang Liu

    (Lawrence Livermore National Laboratory)

  • Kentaro Uesugi

    (Japan Synchrotron Radiation Research Institute (JASRI/SPring-8))

  • Aiko Nakato

    (National Institute of Polar Research (NIPR)
    Japan Aerospace Exploration Agency (JAXA))

  • Kasumi Yogata

    (Japan Aerospace Exploration Agency (JAXA))

  • Hayato Yuzawa

    (Institute for Molecular Science)

  • Yuzuru Karouji

    (Osaka University, 8-1 Mihogaoka)

  • Satoru Nakazawa

    (Japan Aerospace Exploration Agency (JAXA))

  • Tatsuaki Okada

    (Japan Aerospace Exploration Agency (JAXA))

  • Takanao Saiki

    (Japan Aerospace Exploration Agency (JAXA))

  • Satoshi Tanaka

    (Japan Aerospace Exploration Agency (JAXA))

  • Fuyuto Terui

    (Japan Aerospace Exploration Agency (JAXA))

  • Makoto Yoshikawa

    (Japan Aerospace Exploration Agency (JAXA))

  • Akiko Miyazaki

    (Japan Aerospace Exploration Agency (JAXA))

  • Masahiro Nishimura

    (Japan Aerospace Exploration Agency (JAXA))

  • Toru Yada

    (Japan Aerospace Exploration Agency (JAXA))

  • Masanao Abe

    (Japan Aerospace Exploration Agency (JAXA))

  • Tomohiro Usui

    (Japan Aerospace Exploration Agency (JAXA))

  • Sen-ichiro Watanabe

    (Nagoya University)

  • Yuichi Tsuda

    (Japan Aerospace Exploration Agency (JAXA)
    The Graduate University for Advanced Studies (SOKENDAI))

Abstract

Ryugu is the C-type asteroid from which material was brought to Earth by the Hayabusa2 mission. A number of individual grains and fine-grained samples analysed so far for noble gases have indicated that solar wind and planetary (known as P1) noble gases are present in Ryugu samples with concentrations higher than those observed in CIs, suggesting the former to be more primitive compared to the latter. Here we present results of analyses of three fine-grained samples from Ryugu, in one of which Xe concentration is an order of magnitude higher than determined so far in other samples from Ryugu. Isotopically, this Xe resembles P1, but with a much stronger isotopic fractionation relative to solar wind and significantly lower 36Ar/132Xe ratio than in P1. This previously unknown primordial noble gas component (here termed P7) provides clues to constrain how the solar composition was fractionated to form the planetary components.

Suggested Citation

  • Alexander B. Verchovsky & Feargus A. J. Abernethy & Mahesh Anand & Ian A. Franchi & Monica M. Grady & Richard C. Greenwood & Simeon J. Barber & Martin Suttle & Motoo Ito & Naotaka Tomioka & Masayuki U, 2024. "A primordial noble gas component discovered in the Ryugu asteroid and its implications," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52165-0
    DOI: 10.1038/s41467-024-52165-0
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