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

Autor: Verchovsky AB; The Open University, Milton Keynes, UK. sasha.verchovsky@open.ac.uk., Abernethy FAJ; The Open University, Milton Keynes, UK., Anand M; The Open University, Milton Keynes, UK., Franchi IA; The Open University, Milton Keynes, UK., Grady MM; The Open University, Milton Keynes, UK., Greenwood RC; The Open University, Milton Keynes, UK., Barber SJ; The Open University, Milton Keynes, UK., Suttle M; The Open University, Milton Keynes, UK., Ito M; Kochi Institute for Core Sample Research, X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi, Japan.; National Graduate Institute for Policy Studies (GRIPS), Nankoku, Kochi, Japan., Tomioka N; Kochi Institute for Core Sample Research, X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi, Japan., Uesugi M; Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo, Japan., Yamaguchi A; National Institute of Polar Research (NIPR), Tachikawa, Tokyo, Japan., Kimura M; Faculty of Science, Kanagawa University, Yokohama, Kanagawa, Japan., Imae N; UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki, Aichi, Japan., Shirai N; Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, Japan., Ohigashi T; UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki, Aichi, Japan.; Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, Japan., Liu MC; Lawrence Livermore National Laboratory, Livermore, CA, USA., Uesugi K; Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo, Japan., Nakato A; National Institute of Polar Research (NIPR), Tachikawa, Tokyo, Japan.; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Yogata K; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Yuzawa H; UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki, Aichi, Japan., Karouji Y; Core Facility Center, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, Japan., Nakazawa S; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Okada T; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Saiki T; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Tanaka S; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Terui F; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Yoshikawa M; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Miyazaki A; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Nishimura M; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Yada T; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Abe M; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Usui T; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan., Watanabe SI; Graduate School of Environmental Studies, Nagoya University, Nagoya, Aichi, Japan., Tsuda Y; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa, Japan.; The Graduate University for Advanced Studies (SOKENDAI), Hayama, Kanagawa, Japan.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Sep 14; Vol. 15 (1), pp. 8075. Date of Electronic Publication: 2024 Sep 14.
DOI: 10.1038/s41467-024-52165-0
Abstrakt: 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 36 Ar/ 132 Xe 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.
(© 2024. Crown.)
Databáze: MEDLINE
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