Centers and Institutes
Published October 20, 2022 | Version v1
Journal article Open

Ryugu's nucleosynthetic heritage from the outskirts of the Solar System

Creators

  • 1. University of Chicago
  • 2. Tokyo Denki University
  • 3. Sorbonne Université
  • 4. Carnegie Institution for Science
  • 5. Washington University in St. Louis
  • 6. Chinese Academy of Sciences
  • 7. Hokkaido University
  • 8. University of Copenhagen
  • 9. Universität Bayreuth
  • 10. Université Paris Cité
  • 11. Seoul National University
  • 12. University of Göttingen
  • 13. Ibaraki University
  • 14. Japan Aerospace Exploration Agency
  • 15. Tokyo Institute of Technology
  • 16. University of Tokyo

Description

Little is known about the origin of the spectral diversity of asteroids and what it says about conditions in the protoplanetary disk. Here, we show that samples returned from Cb-type asteroid Ryugu have Fe isotopic anomalies indistinguishable from Ivuna-type (CI) chondrites, which are distinct from all other carbonaceous chondrites. Iron isotopes, therefore, demonstrate that Ryugu and CI chondrites formed in a reservoir that was different from the source regions of other carbonaceous asteroids. Growth and migration of the giant planets destabilized nearby planetesimals and ejected some inward to be implanted into the Main Belt. In this framework, most carbonaceous chondrites may have originated from regions around the birthplaces of Jupiter and Saturn, while the distinct isotopic composition of CI chondrites and Ryugu may reflect their formation further away in the disk, owing their presence in the inner Solar System to excitation by Uranus and Neptune.

Notes

Due to the large number of authors, only the first 20 and the University of Chicago authors are included on the above author list. Please download the article for the complete list of authors.

Data availability

All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Data of Hayabusa2 sample and other data from the mission are available at the DARTS archive at www.darts.isas.jaxa.jp/curation/hayabusa2 and www.darts.isas.jaxa.jp/planet/project/hayabusa2/.

Files

sciadv.add8141.pdf

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Additional details

Identifiers

DOI
10.1126/sciadv.add8141
Other
oai:uchicago.tind.io:11016

Funding

National Science Foundation
EAR-2001098
U.S. Department of Energy
National Aeronautics and Space Administration
NNX17AE86G
National Aeronautics and Space Administration
80NSSC17K0744
National Aeronautics and Space Administration
000306-002
National Aeronautics and Space Administration
80NSSC21K0380
National Aeronautics and Space Administration
0995GXB174

UChicago Information

Division(s)
Physical Sciences Division
Department(s)
Enrico Fermi Institute, Geophysical Sciences