Ryugu’s observed volatile loss did not arise from impact heating alone

DOI DOI HANDLE PDF Web Site 被引用文献5件 参考文献37件 オープンアクセス

書誌事項

公開日
2021-07-22
資源種別
journal article
権利情報
  • https://creativecommons.org/licenses/by/4.0
  • https://creativecommons.org/licenses/by/4.0
DOI
  • 10.1038/s43247-021-00218-3
  • 10.48550/arxiv.2205.09372
公開者
Springer Science and Business Media LLC

説明

<jats:title>Abstract</jats:title><jats:p>Carbonaceous asteroids, including Ryugu and Bennu, which have been explored by the Hayabusa2 and OSIRIS-REx missions, were probably important carriers of volatiles to the inner Solar System. However, Ryugu has experienced significant volatile loss, possibly from hypervelocity impact heating. Here we present impact experiments at speeds comparable to those expected in the main asteroid belt (3.7 km s<jats:sup>−1</jats:sup> and 5.8 km s<jats:sup>−1</jats:sup>) and with analogue target materials. We find that loss of volatiles from the target material due to impacts is not sufficient to account for the observed volatile depletion of Ryugu. We propose that mutual collisions in the main asteroid belt are unlikely to be solely responsible for the loss of volatiles from Ryugu or its parent body. Instead, we suggest that additional processes, for example associated with the diversity in mechanisms and timing of their formation, are necessary to account for the variable volatile contents of carbonaceous asteroids.</jats:p>

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