DOAJ Open Access 2024

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

Simon Petrus Niall Whiteford Polychronis Patapis Beth A. Biller Andrew Skemer +117 lainnya

Abstrak

The unprecedented medium-resolution ( R _λ ∼ 1500–3500) near- and mid-infrared (1–18 μ m) spectrum provided by JWST for the young (140 ± 20 Myr) low-mass (12–20 M _Jup ) 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: T _eff , log( g ), [M/H], C/O, γ , f _sed , 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 T _eff 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.

Topik & Kata Kunci

Astrophysics

Penulis (122)

Simon Petrus

Niall Whiteford

Polychronis Patapis

Beth A. Biller

Andrew Skemer

Sasha Hinkley

Genaro Suárez

Paulina Palma-Bifani

Caroline V. Morley

Pascal Tremblin

Benjamin Charnay

Johanna M. Vos

Jason J. Wang

Jordan M. Stone

Mickaël Bonnefoy

Gaël Chauvin

Brittany E. Miles

Aarynn L. Carter

Anna Lueber

Christiane Helling

Ben J. Sutlieff

Markus Janson

Eileen C. Gonzales

Kielan K. W. Hoch

Olivier Absil

William O. Balmer

Anthony Boccaletti

Mariangela Bonavita

Mark Booth

Brendan P. Bowler

Zackery W. Briesemeister

Marta L. Bryan

Per Calissendorff

Faustine Cantalloube

Christine H. Chen

Elodie Choquet

Valentin Christiaens

Gabriele Cugno

Thayne Currie

Camilla Danielski

Matthew De Furio

Trent J. Dupuy

Samuel M. Factor

Jacqueline K. Faherty

Michael P. Fitzgerald

Jonathan J. Fortney

Kyle Franson

Julien H. Girard

Carol A. Grady

Thomas Henning

Dean C. Hines

Callie E. Hood

Alex R. Howe

Paul Kalas

Jens Kammerer

Grant M. Kennedy

Matthew A. Kenworthy

Pierre Kervella

Minjae Kim

Daniel Kitzmann

Adam L. Kraus

Masayuki Kuzuhara

Pierre-Olivier Lagage

Anne-Marie Lagrange

Kellen Lawson

Cecilia Lazzoni

Jarron M. Leisenring

Ben W. P. Lew

Michael C. Liu

Pengyu Liu

Jorge Llop-Sayson

James P. Lloyd

Bruce Macintosh

Mathilde Mâlin

Elena Manjavacas

Sebastián Marino

Mark S. Marley

Christian Marois

Raquel A. Martinez

Elisabeth C. Matthews

Brenda C. Matthews

Dimitri Mawet

Johan Mazoyer

Michael W. McElwain

Stanimir Metchev

Michael R. Meyer

Maxwell A. Millar-Blanchaer

Paul Mollière

Sarah E. Moran

Sagnick Mukherjee

Eric Pantin

Marshall D. Perrin

Laurent Pueyo

Sascha P. Quanz

Andreas Quirrenbach

Shrishmoy Ray

Isabel Rebollido

Jea Adams Redai

Bin B. Ren

Emily Rickman

Steph Sallum

Matthias Samland

Benjamin Sargent

Joshua E. Schlieder

Karl R. Stapelfeldt

Motohide Tamura

Xianyu Tan

Christopher A. Theissen

Taichi Uyama

Malavika Vasist

Arthur Vigan

Kevin Wagner

Kimberly Ward-Duong

Schuyler G. Wolff

Kadin Worthen

Mark C. Wyatt

Marie Ygouf

Alice Zurlo

Xi Zhang

Keming Zhang

Zhoujian Zhang

Yifan Zhou

Format Sitasi

APA MLA BibTeX

Petrus, S., Whiteford, N., Patapis, P., Biller, B.A., Skemer, A., Hinkley, S. et al. (2024). 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. https://doi.org/10.3847/2041-8213/ad3e7c

@article{petrus2024, author = {Simon Petrus and Niall Whiteford and Polychronis Patapis and Beth A. Biller and Andrew Skemer and Sasha Hinkley and Genaro Suárez and Paulina Palma-Bifani and Caroline V. Morley and Pascal Tremblin and Benjamin Charnay and Johanna M. Vos and Jason J. Wang and Jordan M. Stone and Mickaël Bonnefoy and Gaël Chauvin and Brittany E. Miles and Aarynn L. Carter and Anna Lueber and Christiane Helling and Ben J. Sutlieff and Markus Janson and Eileen C. Gonzales and Kielan K. W. Hoch and Olivier Absil and William O. Balmer and Anthony Boccaletti and Mariangela Bonavita and Mark Booth and Brendan P. Bowler and Zackery W. Briesemeister and Marta L. Bryan and Per Calissendorff and Faustine Cantalloube and Christine H. Chen and Elodie Choquet and Valentin Christiaens and Gabriele Cugno and Thayne Currie and Camilla Danielski and Matthew De Furio and Trent J. Dupuy and Samuel M. Factor and Jacqueline K. Faherty and Michael P. Fitzgerald and Jonathan J. Fortney and Kyle Franson and Julien H. Girard and Carol A. Grady and Thomas Henning and Dean C. Hines and Callie E. Hood and Alex R. Howe and Paul Kalas and Jens Kammerer and Grant M. Kennedy and Matthew A. Kenworthy and Pierre Kervella and Minjae Kim and Daniel Kitzmann and Adam L. Kraus and Masayuki Kuzuhara and Pierre-Olivier Lagage and Anne-Marie Lagrange and Kellen Lawson and Cecilia Lazzoni and Jarron M. Leisenring and Ben W. P. Lew and Michael C. Liu and Pengyu Liu and Jorge Llop-Sayson and James P. Lloyd and Bruce Macintosh and Mathilde Mâlin and Elena Manjavacas and Sebastián Marino and Mark S. Marley and Christian Marois and Raquel A. Martinez and Elisabeth C. Matthews and Brenda C. Matthews and Dimitri Mawet and Johan Mazoyer and Michael W. McElwain and Stanimir Metchev and Michael R. Meyer and Maxwell A. Millar-Blanchaer and Paul Mollière and Sarah E. Moran and Sagnick Mukherjee and Eric Pantin and Marshall D. Perrin and Laurent Pueyo and Sascha P. Quanz and Andreas Quirrenbach and Shrishmoy Ray and Isabel Rebollido and Jea Adams Redai and Bin B. Ren and Emily Rickman and Steph Sallum and Matthias Samland and Benjamin Sargent and Joshua E. Schlieder and Karl R. Stapelfeldt and Motohide Tamura and Xianyu Tan and Christopher A. Theissen and Taichi Uyama and Malavika Vasist and Arthur Vigan and Kevin Wagner and Kimberly Ward-Duong and Schuyler G. Wolff and Kadin Worthen and Mark C. Wyatt and Marie Ygouf and Alice Zurlo and Xi Zhang and Keming Zhang and Zhoujian Zhang and Yifan Zhou}, 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}, year = {2024}, journal = {DOAJ}, doi = {10.3847/2041-8213/ad3e7c}, url = {https://doi.org/10.3847/2041-8213/ad3e7c}, }

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.3847/2041-8213/ad3e7c
Akses: Open Access ✓