Show simple item record

dc.contributor.authorVos, Johanna M.
dc.contributor.authorBurningham, Ben
dc.contributor.authorFaherty, Jacqueline K.
dc.contributor.authorAlejandro, Sherelyn
dc.contributor.authorGonzales, Eileen
dc.contributor.authorCalamari, Emily
dc.contributor.authorGagliuffi, Daniella Bardalez
dc.contributor.authorVisscher, Channon
dc.contributor.authorTan, Xianyu
dc.contributor.authorMorley, Caroline V.
dc.contributor.authorMarley, Mark
dc.contributor.authorGemma, Marina E.
dc.contributor.authorWhiteford, Niall
dc.contributor.authorGaarn, Josefine
dc.contributor.authorPark, Grace
dc.date.accessioned2023-02-23T17:00:03Z
dc.date.available2023-02-23T17:00:03Z
dc.date.issued2023-02-01
dc.identifier.citationVos , J M , Burningham , B , Faherty , J K , Alejandro , S , Gonzales , E , Calamari , E , Gagliuffi , D B , Visscher , C , Tan , X , Morley , C V , Marley , M , Gemma , M E , Whiteford , N , Gaarn , J & Park , G 2023 , ' Patchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogs ' , The Astrophysical Journal , vol. 944 , no. 2 , 138 , pp. 1-20 . https://doi.org/10.3847/1538-4357/acab58
dc.identifier.issn0004-637X
dc.identifier.otherArXiv: http://arxiv.org/abs/2212.07399v1
dc.identifier.otherJisc: 915793
dc.identifier.otherpublisher-id: apjacab58
dc.identifier.othermanuscript: acab58
dc.identifier.otherother: aas42944
dc.identifier.otherORCID: /0000-0003-4600-5627/work/129621911
dc.identifier.urihttp://hdl.handle.net/2299/26086
dc.description© 2023. The Author(s). Published by the American Astronomical Society. This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/
dc.description.abstractWe present an atmospheric retrieval analysis of a pair of highly variable, ∼200 Myr old, early T type planetary-mass exoplanet analogs SIMP J01365662+0933473 and 2MASS J21392676+0220226 using the Brewster retrieval framework. Our analysis, which makes use of archival 1–15 μm spectra, finds almost identical atmospheres for both objects. For both targets, we find that the data is best described by a patchy, high-altitude forsterite (Mg2SiO4) cloud above a deeper, optically thick iron (Fe) cloud. Our model constrains the cloud properties well, including the cloud locations and cloud particle sizes. We find that the patchy forsterite slab cloud inferred from our retrieval may be responsible for the spectral behavior of the observed variability. Our retrieved cloud structure is consistent with the atmospheric structure previously inferred from spectroscopic variability measurements, but clarifies this picture significantly. We find consistent C/O ratios for both objects, which supports their formation within the same molecular cloud in the Carina-Near moving group. Finally, we note some differences in the constrained abundances of H2O and CO, which may be caused by data quality and/or astrophysical processes such as auroral activity and their differing rotation rates. The results presented in this work provide a promising preview of the detail with which we will characterize extrasolar atmospheres with JWST, which will yield higher-quality spectra across a wider wavelength range.en
dc.format.extent20
dc.format.extent11872447
dc.format.extent2270672
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subject340
dc.subjectStars and Stellar Physics
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titlePatchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogsen
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionCentre for Astrophysics Research (CAR)
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85148864142&partnerID=8YFLogxK
rioxxterms.versionofrecord10.3847/1538-4357/acab58
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record