The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. V. Do Self-consistent Atmospheric Models Represent JWST Spectra? A Showcase with VHS 1256–1257 b
dc.contributor.author | Petrus, S | |
dc.contributor.author | Whiteford, N | |
dc.contributor.author | Patapis, P | |
dc.contributor.author | Biller, BA | |
dc.contributor.author | Skemer, A | |
dc.contributor.author | Hinkley, S | |
dc.contributor.author | Suárez, G | |
dc.contributor.author | Palma-Bifani, P | |
dc.contributor.author | Morley, CV | |
dc.contributor.author | Tremblin, P | |
dc.contributor.author | Charnay, B | |
dc.contributor.author | Vos, JM | |
dc.contributor.author | Wang, JJ | |
dc.contributor.author | Stone, JM | |
dc.contributor.author | Bonnefoy, M | |
dc.contributor.author | Chauvin, G | |
dc.contributor.author | Miles, BE | |
dc.contributor.author | Carter, AL | |
dc.contributor.author | Lueber, A | |
dc.contributor.author | Helling, C | |
dc.contributor.author | Sutlieff, BJ | |
dc.contributor.author | Janson, M | |
dc.contributor.author | Gonzales, EC | |
dc.contributor.author | Hoch, KKW | |
dc.contributor.author | Absil, O | |
dc.contributor.author | Balmer, WO | |
dc.contributor.author | Boccaletti, A | |
dc.contributor.author | Bonavita, M | |
dc.contributor.author | Booth, M | |
dc.contributor.author | Bowler, BP | |
dc.contributor.author | Briesemeister, ZW | |
dc.contributor.author | Bryan, ML | |
dc.contributor.author | Calissendorff, P | |
dc.contributor.author | Cantalloube, F | |
dc.contributor.author | Chen, CH | |
dc.contributor.author | Choquet, E | |
dc.contributor.author | Christiaens, V | |
dc.contributor.author | Cugno, G | |
dc.contributor.author | Currie, T | |
dc.contributor.author | Danielski, C | |
dc.contributor.author | De Furio, M | |
dc.contributor.author | Dupuy, TJ | |
dc.contributor.author | Factor, SM | |
dc.contributor.author | Faherty, JK | |
dc.contributor.author | Fitzgerald, MP | |
dc.contributor.author | Fortney, JJ | |
dc.contributor.author | Franson, K | |
dc.contributor.author | Girard, JH | |
dc.contributor.author | Grady, CA | |
dc.contributor.author | Henning, T | |
dc.contributor.author | Hines, DC | |
dc.contributor.author | Hood, CE | |
dc.contributor.author | Howe, AR | |
dc.contributor.author | Kalas, P | |
dc.contributor.author | Kammerer, J | |
dc.contributor.author | Kennedy, GM | |
dc.contributor.author | Kenworthy, MA | |
dc.contributor.author | Kervella, P | |
dc.contributor.author | Kim, M | |
dc.contributor.author | Kitzmann, D | |
dc.contributor.author | Kraus, AL | |
dc.contributor.author | Kuzuhara, M | |
dc.contributor.author | Lagage, P-O | |
dc.contributor.author | Lagrange, A-M | |
dc.contributor.author | Lawson, K | |
dc.contributor.author | Lazzoni, C | |
dc.contributor.author | Leisenring, JM | |
dc.contributor.author | Lew, BWP | |
dc.contributor.author | Liu, MC | |
dc.contributor.author | Liu, P | |
dc.contributor.author | Llop-Sayson, J | |
dc.contributor.author | Lloyd, JP | |
dc.contributor.author | Macintosh, B | |
dc.contributor.author | Mâlin, M | |
dc.contributor.author | Manjavacas, E | |
dc.contributor.author | Marino, S | |
dc.contributor.author | Marley, MS | |
dc.contributor.author | Marois, C | |
dc.contributor.author | Martinez, RA | |
dc.contributor.author | Matthews, EC | |
dc.contributor.author | Matthews, BC | |
dc.contributor.author | Mawet, D | |
dc.contributor.author | Mazoyer, J | |
dc.contributor.author | McElwain, MW | |
dc.contributor.author | Metchev, S | |
dc.contributor.author | Meyer, MR | |
dc.contributor.author | Millar-Blanchaer, MA | |
dc.contributor.author | Mollière, P | |
dc.contributor.author | Moran, SE | |
dc.contributor.author | Mukherjee, S | |
dc.contributor.author | Pantin, E | |
dc.contributor.author | Perrin, MD | |
dc.contributor.author | Pueyo, L | |
dc.contributor.author | Quanz, SP | |
dc.contributor.author | Quirrenbach, A | |
dc.contributor.author | Ray, S | |
dc.contributor.author | Rebollido, I | |
dc.contributor.author | Redai, JA | |
dc.contributor.author | Bin B. Ren | |
dc.contributor.author | Rickman, E | |
dc.contributor.author | Sallum, S | |
dc.contributor.author | Samland, M | |
dc.contributor.author | Sargent, B | |
dc.contributor.author | Schlieder, JE | |
dc.contributor.author | Stapelfeldt, KR | |
dc.contributor.author | Tamura, M | |
dc.contributor.author | Tan, X | |
dc.contributor.author | Theissen, CA | |
dc.contributor.author | Uyama, T | |
dc.contributor.author | Vasist, M | |
dc.contributor.author | Vigan, A | |
dc.contributor.author | Wagner, K | |
dc.contributor.author | Ward-Duong, K | |
dc.contributor.author | Wolff, SG | |
dc.contributor.author | Worthen, K | |
dc.contributor.author | Wyatt, MC | |
dc.contributor.author | Ygouf, M | |
dc.contributor.author | Zurlo, A | |
dc.contributor.author | Zhang, X | |
dc.contributor.author | Zhang, K | |
dc.contributor.author | Zhang, Z | |
dc.contributor.author | Zhou, Y | |
dc.date.accessioned | 2024-05-09T08:49:00Z | |
dc.date.issued | 2024-04-25 | |
dc.date.updated | 2024-05-07T14:32:17Z | |
dc.description.abstract | The unprecedented medium-resolution (Rλ ∼ 1500–3500) near- and mid-infrared (1–18 μm) spectrum provided by JWST for the young (140 ± 20 Myr) low-mass (12–20 MJup) L–T transition (L7) companion VHS 1256 b gives access to a catalog of molecular absorptions. In this study, we present a comprehensive analysis of this data set utilizing a forward-modeling approach applying our Bayesian framework, ForMoSA. We explore five distinct atmospheric models to assess their performance in estimating key atmospheric parameters: Teff, log(g), [M/H], C/O, γ, fsed, and R. Our findings reveal that each parameter's estimate is significantly influenced by factors such as the wavelength range considered and the model chosen for the fit. This is attributed to systematic errors in the models and their challenges in accurately replicating the complex atmospheric structure of VHS 1256 b, notably the complexity of its clouds and dust distribution. To propagate the impact of these systematic uncertainties on our atmospheric property estimates, we introduce innovative fitting methodologies based on independent fits performed on different spectral windows. We finally derived a Teff consistent with the spectral type of the target, considering its young age, which is confirmed by our estimate of log(g). Despite the exceptional data quality, attaining robust estimates for chemical abundances [M/H] and C/O, often employed as indicators of formation history, remains challenging. Nevertheless, the pioneering case of JWST's data for VHS 1256 b has paved the way for future acquisitions of substellar spectra that will be systematically analyzed to directly compare the properties of these objects and correct the systematics in the models. | en_GB |
dc.identifier.citation | Vol. 966(1), article L11 | en_GB |
dc.identifier.doi | https://doi.org/10.3847/2041-8213/ad3e7c | |
dc.identifier.uri | http://hdl.handle.net/10871/135918 | |
dc.identifier | ORCID: 0000-0001-8074-2562 (Hinkley, Sasha) | |
dc.language.iso | en | en_GB |
dc.publisher | American Astronomical Society / IOP Publishing | en_GB |
dc.rights | © 2024. The Author(s). Published by the American Astronomical Society. Open access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI | en_GB |
dc.title | The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. V. Do Self-consistent Atmospheric Models Represent JWST Spectra? A Showcase with VHS 1256–1257 b | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2024-05-09T08:49:00Z | |
dc.identifier.issn | 2041-8205 | |
dc.description | This is the final version. Available on open access from IOP Publishing via the DOI in this record | en_GB |
dc.identifier.eissn | 2041-8213 | |
dc.identifier.journal | The Astrophysical Journal Letters | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2024-01-23 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2024-04-25 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2024-05-09T08:46:23Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2024-05-09T08:49:14Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2024-04-25 |
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Except where otherwise noted, this item's licence is described as © 2024. The Author(s). Published by the American Astronomical Society. Open access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI