論文

国際誌
2024年9月14日

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

Nature communications
  • 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 Uesugi
  • Akira Yamaguchi
  • Makoto Kimura
  • Naoya Imae
  • Naoki Shirai
  • Takuji Ohigashi
  • Ming-Chang Liu
  • Kentaro Uesugi
  • Aiko Nakato
  • Kasumi Yogata
  • Hayato Yuzawa
  • Yuzuru Karouji
  • Satoru Nakazawa
  • Tatsuaki Okada
  • Takanao Saiki
  • Satoshi Tanaka
  • Fuyuto Terui
  • Makoto Yoshikawa
  • Akiko Miyazaki
  • Masahiro Nishimura
  • Toru Yada
  • Masanao Abe
  • Tomohiro Usui
  • Sen-Ichiro Watanabe
  • Yuichi Tsuda
  • 全て表示

15
1
開始ページ
8075
終了ページ
8075
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41467-024-52165-0

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.

リンク情報
DOI
https://doi.org/10.1038/s41467-024-52165-0
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/39277576
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11401872
ID情報
  • DOI : 10.1038/s41467-024-52165-0
  • PubMed ID : 39277576
  • PubMed Central 記事ID : PMC11401872

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