{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T01:29:36Z","timestamp":1791941376414,"version":"4.3.4"},"reference-count":95,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"6634","content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Science"],"published-print":{"date-parts":[[2023,2,24]]},"abstract":"<jats:p>The near-Earth carbonaceous asteroid (162173) Ryugu is expected to contain volatile chemical species that could provide information on the origin of Earth\u2019s volatiles. Samples of Ryugu were retrieved by the Hayabusa2 spacecraft. We measured noble gas and nitrogen isotopes in Ryugu samples and found that they are dominated by presolar 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 different abundances among the samples. Our measurements support a close relationship between Ryugu and CI chondrites. Noble gases produced by galactic cosmic rays, indicating a ~5 million year exposure, and from implanted solar wind record the recent irradiation history of Ryugu after it migrated to its current orbit.<\/jats:p>","DOI":"10.1126\/science.abo0431","type":"journal-article","created":{"date-parts":[[2022,10,20]],"date-time":"2022-10-20T18:00:27Z","timestamp":1666288827000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":76,"title":["Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution"],"prefix":"10.1126","volume":"379","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0177-7527","authenticated-orcid":true,"given":"Ryuji","family":"Okazaki","sequence":"first","affiliation":[{"name":"Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7936-1519","authenticated-orcid":true,"given":"Bernard","family":"Marty","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, CRPG, F-54000 Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0867-6908","authenticated-orcid":true,"given":"Henner","family":"Busemann","sequence":"additional","affiliation":[{"name":"Institute of Geochemistry and Petrology, Eidgen\u00f6ssische Technische Hochschule Z\u00fcrich, 8092 Z\u00fcrich, Switzerland."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8714-4845","authenticated-orcid":true,"given":"Ko","family":"Hashizume","sequence":"additional","affiliation":[{"name":"Faculty of Science, Ibaraki University, Mito 310-8512, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1990-8636","authenticated-orcid":true,"given":"Jamie D.","family":"Gilmour","sequence":"additional","affiliation":[{"name":"Department of Earth and Environmental Sciences, The University of Manchester, Manchester M13 9PL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9693-833X","authenticated-orcid":true,"given":"Alex","family":"Meshik","sequence":"additional","affiliation":[{"name":"Department of Physics, Washington University in St. Louis, St. Louis, MO 63130, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7971-510X","authenticated-orcid":true,"given":"Toru","family":"Yada","sequence":"additional","affiliation":[{"name":"Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fumio","family":"Kitajima","sequence":"additional","affiliation":[{"name":"Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5031-4687","authenticated-orcid":true,"given":"Michael W.","family":"Broadley","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, CRPG, F-54000 Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3783-6816","authenticated-orcid":true,"given":"David","family":"Byrne","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, CRPG, F-54000 Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7680-2478","authenticated-orcid":true,"given":"Evelyn","family":"F\u00fcri","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, CRPG, F-54000 Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2098-9587","authenticated-orcid":true,"given":"My E. 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