Laforet, Sylvain, Le Guillou, Corentin, de la Peña, Francisco, Walls, Michael, Tizei, Luiz H. G., Marinova, Maya, Beck, Pierre, Phan, Van T. H., Jacob, Damien, Mouloud, Bahae-eddine, and others. (2024) Linking Cause and Effect: Nanoscale Vibrational Spectroscopy of Space Weathering from Asteroid Ryugu. The Astrophysical Journal Letters, 963 (2). Article Number L45. ISSN 2041-8213. (doi:10.3847/2041-8213/ad2b65) (KAR id:105247)
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Language: English 
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| Official URL: https://doi.org/10.3847/2041-8213/ad2b65 |
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Abstract
Airless bodies are subjected to space-weathering effects that modify the first few microns of their surface. Therefore, understanding their impact on the optical properties of asteroids is key to the interpretation of their color variability and infrared reflectance observations. The recent Hayabusa2 sample return mission to asteroid Ryugu offers the first opportunity to study these effects, in the case of the most abundant spectral type among the main-asteroid belt, C-type objects. This study employs vibrational electron energy-loss spectroscopy in the transmission electron microscope to achieve the spatial resolution required to measure the distinct mid-infrared spectral signature of Ryugu's space-weathered surface. The comparison with the spectrum of the pristine underlying matrix reveals the loss of structural -OH and C-rich components in the space-weathered layers, providing direct experimental evidence that exposure to the space environment tends to mask the optical signatures of phyllosilicates and carbonaceous matter. Our findings should contribute to rectifying potential underestimations of water and carbon content of C-type asteroids when studied through remote sensing with new-generation telescopes.
| Item Type: | Article |
|---|---|
| DOI/Identification number: | 10.3847/2041-8213/ad2b65 |
| Uncontrolled keywords: | Vibrational spectroscopy, Space weather, Impact gardening, Remote sensing, Asteroid surfaces, Infrared spectroscopy, Planetary mineralogy, Small Solar System bodies |
| Subjects: |
Q Science Q Science > QC Physics |
| Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
| Funders: | Agence Nationale de la Recherche (https://ror.org/00rbzpz17) |
| SWORD Depositor: | JISC Publications Router |
| Depositing User: | JISC Publications Router |
| Date Deposited: | 15 Mar 2024 15:30 UTC |
| Last Modified: | 18 Mar 2024 12:01 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/105247 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Hallatt, Daniel.
| Creator's ORCID: |
 https://orcid.org/0000-0002-4426-9891
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