Show simple item record

dc.contributor.authorBean, Jacob L
dc.contributor.authorXue, Qiao
dc.contributor.authorAugust, Prune C
dc.contributor.authorLunine, Jonathan
dc.contributor.authorZhang, Michael
dc.contributor.authorThorngren, Daniel
dc.contributor.authorTsai, Shang-Min
dc.contributor.authorStassun, Keivan G
dc.contributor.authorSchlawin, Everett
dc.contributor.authorAhrer, Eva-Maria
dc.contributor.authorIh, Jegug
dc.contributor.authorMansfield, Megan
dc.date.accessioned2024-05-14T21:33:43Z
dc.date.available2024-05-14T21:33:43Z
dc.date.issued2023-03-27
dc.identifier.citationBean, J.L., Xue, Q., August, P.C. et al. High atmospheric metal enrichment for a Saturn-mass planet. Nature 618, 43–46 (2023). https://doi.org/10.1038/s41586-023-05984-yen_US
dc.identifier.pmid36972686
dc.identifier.doi10.1038/s41586-023-05984-y
dc.identifier.urihttp://hdl.handle.net/10150/672363
dc.description.abstractAtmospheric metal enrichment (that is, elements heavier than helium, also called 'metallicity') is a key diagnostic of the formation of giant planets1-3. The giant planets of the Solar System show an inverse relationship between mass and both their bulk metallicities and atmospheric metallicities. Extrasolar giant planets also display an inverse relationship between mass and bulk metallicity4. However, there is significant scatter in the relationship and it is not known how atmospheric metallicity correlates with either planet mass or bulk metallicity. Here we show that the Saturn-mass exoplanet HD 149026b (refs. 5-9) has an atmospheric metallicity 59-276 times solar (at 1σ), which is greater than Saturn's atmospheric metallicity of roughly 7.5 times solar10 at more than 4σ confidence. This result is based on modelling CO2 and H2O absorption features in the thermal emission spectrum of the planet measured by the James Webb Space Telescope. HD 149026b is the most metal-rich giant planet known, with an estimated bulk heavy element abundance of 66 ± 2% by mass11,12. We find that the atmospheric metallicities of both HD 149026b and the Solar System giant planets are more correlated with bulk metallicity than planet mass.en_US
dc.language.isoenen_US
dc.publisherNature Researchen_US
dc.rights© 2023. The Author(s), under exclusive licence to Springer Nature Limited.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.titleHigh atmospheric metal enrichment for a Saturn-mass planeten_US
dc.typeArticleen_US
dc.identifier.eissn1476-4687
dc.contributor.departmentSteward Observatory, University of Arizonaen_US
dc.identifier.journalNatureen_US
dc.description.note6 month embargo; first published 27 March 2023en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.journaltitleNature
dc.source.volume618
dc.source.issue7963
dc.source.beginpage43
dc.source.endpage46
refterms.dateFOA2023-09-27T00:00:00Z
dc.source.countryEngland


Files in this item

Thumbnail
Name:
bean2023hd149026b_high_metal_e ...
Size:
4.498Mb
Format:
PDF
Description:
Final Accepted Manuscript

This item appears in the following Collection(s)

Show simple item record