This site will be out of service for maintenance on Monday, May 6 from 7:30 to 8:00.

Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution

DOI
10.1126/science.abo0431
Okazaki R. et al; Tatsumi E.
Bibliographical reference

Science

Advertised on:
10
2022
Journal
Science
Number of authors
2
IAC number of authors
1
Refereed citations
0
Description
The near-Earth carbonaceous asteroid (162173) Ryugu is expected to contain volatile chemical species that could provide information on the origin of Earth’s volatiles. Samples of Ryugu were retrieved by the Hayabusa2 spacecraft. We measure noble gas and nitrogen isotopes in Ryugu samples, finding they are dominated by pre-solar and primordial components, incorporated during Solar System formation. Noble gas concentrations are higher than those in Ivuna-type carbonaceous (CI) chondrite meteorites. Several host phases of isotopically distinct nitrogen have heterogeneous abundances between the samples. Our measurements support a close relationship between Ryugu and CI chondrites. Noble gases produced by galactic cosmic rays, indicating ~5 Myr exposure, and from implanted solar wind, record the recent irradiation history of Ryugu after it migrated to its current orbit.
Related projects
Project Image
Minor Bodies of the Solar System

This project studies the physical and compositional properties of the so-called minor bodies of the Solar System, that includes asteroids, icy objects, and comets. Of special interest are the trans-neptunian objects (TNOs), including those considered the most distant objects detected so far (Extreme-TNOs or ETNOs); the comets and the comet-asteroid

Julia de
León Cruz
In progress
Type
Refereed
Exoplanetary Systems & Solar System (SEYSS)

It may interest you

  • Refereed
    Nonlinear Wave Damping by Kelvin–Helmholtz Instability-induced Turbulence

    Magnetohydrodynamic kink waves naturally form as a consequence of perturbations to a structured medium, for example, transverse oscillations of coronal loops. Linear theory has provided many insights into the evolution of linear oscillations, and results from these models are often applied to infer information about the solar corona from observed

    Hillier, Andrew et al.

    Advertised on:

    5
    2024
    Bibcode
    2024ApJ...966...68H
    Citations
    0
  • Refereed
    Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST

    JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5000 confirmed planets, more than 4000 Transiting Exoplanet Survey Satellite (TESS) planet candidates are still unconfirmed and many of the best planets for atmospheric characterization may remain to be identified. We present a sample

    Hord, Benjamin J. et al.

    Advertised on:

    5
    2024
    Bibcode
    2024AJ....167..233H
    Citations
    0
  • Refereed
    High-resolution Spectroscopic Reconnaissance of a Temperate Sub-Neptune

    The study of temperate sub-Neptunes is the new frontier in exoplanetary science. A major development in the past year has been the first detection of carbon-bearing molecules in the atmosphere of a temperate sub-Neptune, K2-18 b, a possible Hycean world, with the James Webb Space Telescope (JWST). The JWST is poised to characterize the atmospheres

    Cabot, Samuel H. C. et al.

    Advertised on:

    5
    2024
    Bibcode
    2024ApJ...966L..10C
    Citations
    0