A new primordial noble gas component in the solar system discovered in Ryugu asteroid-Reference-Cited by-同舟云学术

A new primordial noble gas component in the solar system discovered in Ryugu asteroid

Published:2023-12-06 Issue: Volume: Page:
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Author:

Verchovsky Alexander¹,Abernethy Feargus¹,Anand Mahesh¹^ORCID,Franchi Ian¹^ORCID,Grady Monica¹^ORCID,Greenwood Richard¹^ORCID,Barber Simeon¹,Suttle Martin¹^ORCID,Ito Motoo²^ORCID,Tomioka Naotaka²^ORCID,Uesugi Masayuki³^ORCID,Yamaguchi Akira⁴^ORCID,Kimura Makoto⁴^ORCID,Imae Naoya⁴,Shirai Naoki⁵^ORCID,Ohigashi Takuji⁶^ORCID,Liu Ming-Chang⁷,Uesugi Kentaro⁸^ORCID,Nakato Aiko⁴^ORCID,Yogata Kasumi⁹^ORCID,Yuzawa Hayato¹⁰^ORCID,Karouji Yuzuru¹¹,Nakazawa Satoru¹²^ORCID,Okada Tatsuaki¹³,Saiki Takanao¹²,Tanaka Satoshi⁹,Terui Fuyuto¹⁴,Yoshikawa Makoto¹²,Miyazaki Akiko⁹^ORCID,Nishimura Masahiro⁹,Yada Toru¹³,Abe Masanao,Usui Tomohiro⁹^ORCID,Watanabe Sei-ichiro¹⁵^ORCID,Tsuda Yuichi¹²

Affiliation:

1. The Open University

2. Japan Agency for Marine-Earth Science and Technology

3. Japan Synchrotron Radiation Research Institute(JASRI)

4. National Institute of Polar Research

5. Kanagawa University

6. High Energy Accelerator Research Organization

7. Lowrence Livermore National Laboratory

8. Japan Synchrotron Radiation Research Institute

9. JAXA

10. UVSOR/IMS

11. Osaka University

12. Japan Aerospace Exploration Agency

13. Japan Aerospace Exp;oration Agency

14. Kanagawa Institute of Technology

15. Nagoya University

Abstract

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 (P1=Q) 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. We analysed three fine-grained samples from Ryugu, one of which contained a Xe concentration an order of magnitude higher (4x10-7 cc STP/g) than previously found in samples from Ryugu. Isotopically, this Xe resembles Q, but with a much stronger (by a factor of four) isotopic fractionation relative to solar wind and an 36Ar/132Xe ratio at least an order of magnitude lower than in P1. This new planetary primordial noble gas component (here termed P7) provides clues to constrain how the solar composition was fractionated to form the planetary components.

Publisher

Research Square Platform LLC

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