At least one in a dozen stars shows evidence of planetary ingestion

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dc.check.date20/09/2024en
dc.check.infoAccess to this article is restricted until 6 months after publication by request of the publisheren
dc.contributor.authorLiu, Fanen
dc.contributor.authorTing, Yuan-Senen
dc.contributor.authorYong, Daviden
dc.contributor.authorBitsch, Bertramen
dc.contributor.authorKarakas, Amandaen
dc.contributor.authorMurphy, Michael T.en
dc.contributor.authorJoyce, Meridithen
dc.contributor.authorDotter, Aaronen
dc.contributor.authorDai, Feien
dc.date.accessioned2024-04-09T12:30:55Z
dc.date.available2024-04-09T12:30:55Z
dc.date.issued2024-03-20en
dc.description.abstractStellar chemical compositions can be altered by ingestion of planetary material1,2 and/or planet formation, which removes refractory material from the protostellar disk3,4. These ‘planet signatures’ appear as correlations between elemental abundance differences and the dust condensation temperature3,5,6. Detecting these planet signatures, however, is challenging owing to unknown occurrence rates, small amplitudes and heterogeneous star samples with large differences in stellar ages7,8. Therefore, stars born together (that is, co-natal) with identical compositions can facilitate the detection of planet signatures. Although previous spectroscopic studies have been limited to a small number of binary stars9,10,11,12,13, the Gaia satellite14 provides opportunities for detecting stellar chemical signatures of planets among co-moving pairs of stars confirmed to be co-natal15,16. Here we report high-precision chemical abundances for a homogeneous sample of ninety-one co-natal pairs of stars with a well defined selection function and identify at least seven instances of planetary ingestion, corresponding to an occurrence rate of eight per cent. An independent Bayesian indicator is deployed, which can effectively disentangle the planet signatures from other factors, such as random abundance variation and atomic diffusion17. Our study provides evidence of planet signatures and facilitates a deeper understanding of the star–planet–chemistry connection by providing observational constraints on the mechanisms of planet engulfment, formation and evolution.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLiu, F., Ting, Y.-S., Yong, D., Bitsch, B., Karakas, A., Murphy, M. T., Joyce, M., Dotter, A. and Dai, F. (2024) 'At least one in a dozen stars shows evidence of planetary ingestion', Nature, 627, pp. 501-504. https://doi.org/10.1038/s41586-024-07091-yen
dc.identifier.doihttps://doi.org/10.1038/s41586-024-07091-yen
dc.identifier.eissn1476-4687en
dc.identifier.endpage504en
dc.identifier.issn0028-0836en
dc.identifier.journaltitleNatureen
dc.identifier.startpage501en
dc.identifier.urihttps://hdl.handle.net/10468/15778
dc.identifier.volume627en
dc.language.isoenen
dc.publisherSpringer Nature Ltd.en
dc.rights© 2024, the Authors, under exclusive licence to Springer Nature Limited. This is a post-peer-review, pre-copyedit version of an article published as: Liu, F., Ting, Y.-S., Yong, D., Bitsch, B., Karakas, A., Murphy, M. T., Joyce, M., Dotter, A. and Dai, F. (2024) 'At least one in a dozen stars shows evidence of planetary ingestion', Nature, 627, pp. 501-504. The final authenticated version is available online at: https://doi.org/10.1038/s41586-024-07091-yen
dc.subjectStar–planet–chemistry connectionen
dc.subjectPlanetary ingestionen
dc.subjectPlanet engulfment, formation and evolutionen
dc.subjectStaren
dc.titleAt least one in a dozen stars shows evidence of planetary ingestionen
dc.typeArticle (peer-reviewed)en
oaire.citation.issue8004en
oaire.citation.volume627en
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