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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 b

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Main Authors:	Petrus, Simon, Whiteford, Niall, Patapis, Polychronis, Biller, Beth A., Skemer, Andrew, Hinkley, Sasha, Suárez, Genaro, Lueber, Anna, Palma-Bifani, Paulina, Stone, Jordan M., Vos, Johanna M., Morley, Caroline V., Tremblin, Pascal, Charnay, Benjamin, Helling, Christiane, Miles, Brittany E., Carter, Aarynn L., Wang, Jason J., Janson, Markus, Gonzales, Eileen C., Sutlieff, Ben, Hoch, Kielan K. W., Bonnefoy, Mickaël, Chauvin, Gaël, Absil, Olivier, Balmer, William O., Boccaletti, Anthony, Bonavita, Mariangela, Booth, Mark, Bowler, Brendan P., Briesemeister, Zackery W., Bryan, Marta L., Calissendorff, Per, Cantalloube, Faustine, Chen, Christine H., Choquet, Elodie, Christiaens, Valentin, Cugno, Gabriele, Currie, Thayne, Danielski, Camilla, De Furio, Matthew, Dupuy, Trent J., Factor, Samuel M., Faherty, Jacqueline K., Fitzgerald, Michael P., Fortney, Jonathan J., Franson, Kyle, Girard, Julien H., Grady, Carol A., Henning, Thomas, Hines, Dean C., Hood, Callie E., Howe, Alex R., Kalas, Paul, Kammerer, Jens, Kennedy, Grant M., Kenworthy, Matthew A., Kervella, Pierre, Kim, Minjae, Kitzmann, Daniel, Kraus, Adam L., Kuzuhara, Masayuki, Lagage, Pierre-Olivier, Lagrange, Anne-Marie, Lawson, Kellen, Lazzoni, Cecilia, Leisenring, Jarron M., Lew, Ben W. P., Liu, Michael C., Liu, Pengyu, Llop-Sayson, Jorge, Lloyd, James P., Macintosh, Bruce, Mâlin, Mathilde, Manjavacas, Elena, Marino, Sebastián, Marley, Mark S., Marois, Christian, Martinez, Raquel A., Matthews, Elisabeth C., Matthews, Brenda C., Mawet, Dimitri, Mazoyer, Johan, McElwain, Michael W., Metchev, Stanimir, Meyer, Michael R., Millar-Blanchaer, Maxwell A., Mollière, Paul, Moran, Sarah E., Mukherjee, Sagnick, Pantin, Eric, Perrin, Marshall D., Pueyo, Laurent, Quanz, Sascha P., Quirrenbach, Andreas, Ray, Shrishmoy, Rebollido, Isabel, Redai, Jea Adams, Ren, Bin B., Rickman, Emily, Sallum, Steph, Samland, Matthias, Sargent, Benjamin, Schlieder, Joshua E., Stapelfeldt, Karl R., Tamura, Motohide, Tan, Xianyu, Theissen, Christopher A., Uyama, Taichi, Vasist, Malavika, Vigan, Arthur, Wagner, Kevin, Ward-Duong, Kimberly, Wolff, Schuyler G., Worthen, Kadin, Wyatt, Mark C., Ygouf, Marie, Zurlo, Alice, Zhang, Xi, Zhang, Keming, Zhan, Zhoujian, Zhou, Yifan
Format:	Preprint
Published:	2023
Subjects:	Earth and Planetary Astrophysics
Online Access:	Acceder al recurso
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_version_	1866914660413865984
author	Petrus, Simon Whiteford, Niall Patapis, Polychronis Biller, Beth A. Skemer, Andrew Hinkley, Sasha Suárez, Genaro Lueber, Anna Palma-Bifani, Paulina Stone, Jordan M. Vos, Johanna M. Morley, Caroline V. Tremblin, Pascal Charnay, Benjamin Helling, Christiane Miles, Brittany E. Carter, Aarynn L. Wang, Jason J. Janson, Markus Gonzales, Eileen C. Sutlieff, Ben Hoch, Kielan K. W. Bonnefoy, Mickaël Chauvin, Gaël Absil, Olivier Balmer, William O. Boccaletti, Anthony Bonavita, Mariangela Booth, Mark Bowler, Brendan P. Briesemeister, Zackery W. Bryan, Marta L. Calissendorff, Per Cantalloube, Faustine Chen, Christine H. Choquet, Elodie Christiaens, Valentin Cugno, Gabriele Currie, Thayne Danielski, Camilla De Furio, Matthew Dupuy, Trent J. Factor, Samuel M. Faherty, Jacqueline K. Fitzgerald, Michael P. Fortney, Jonathan J. Franson, Kyle Girard, Julien H. Grady, Carol A. Henning, Thomas Hines, Dean C. Hood, Callie E. Howe, Alex R. Kalas, Paul Kammerer, Jens Kennedy, Grant M. Kenworthy, Matthew A. Kervella, Pierre Kim, Minjae Kitzmann, Daniel Kraus, Adam L. Kuzuhara, Masayuki Lagage, Pierre-Olivier Lagrange, Anne-Marie Lawson, Kellen Lazzoni, Cecilia Leisenring, Jarron M. Lew, Ben W. P. Liu, Michael C. Liu, Pengyu Llop-Sayson, Jorge Lloyd, James P. Macintosh, Bruce Mâlin, Mathilde Manjavacas, Elena Marino, Sebastián Marley, Mark S. Marois, Christian Martinez, Raquel A. Matthews, Elisabeth C. Matthews, Brenda C. Mawet, Dimitri Mazoyer, Johan McElwain, Michael W. Metchev, Stanimir Meyer, Michael R. Millar-Blanchaer, Maxwell A. Mollière, Paul Moran, Sarah E. Mukherjee, Sagnick Pantin, Eric Perrin, Marshall D. Pueyo, Laurent Quanz, Sascha P. Quirrenbach, Andreas Ray, Shrishmoy Rebollido, Isabel Redai, Jea Adams Ren, Bin B. Rickman, Emily Sallum, Steph Samland, Matthias Sargent, Benjamin Schlieder, Joshua E. Stapelfeldt, Karl R. Tamura, Motohide Tan, Xianyu Theissen, Christopher A. Uyama, Taichi Vasist, Malavika Vigan, Arthur Wagner, Kevin Ward-Duong, Kimberly Wolff, Schuyler G. Worthen, Kadin Wyatt, Mark C. Ygouf, Marie Zurlo, Alice Zhang, Xi Zhang, Keming Zhan, Zhoujian Zhou, Yifan
author_facet	Petrus, Simon Whiteford, Niall Patapis, Polychronis Biller, Beth A. Skemer, Andrew Hinkley, Sasha Suárez, Genaro Lueber, Anna Palma-Bifani, Paulina Stone, Jordan M. Vos, Johanna M. Morley, Caroline V. Tremblin, Pascal Charnay, Benjamin Helling, Christiane Miles, Brittany E. Carter, Aarynn L. Wang, Jason J. Janson, Markus Gonzales, Eileen C. Sutlieff, Ben Hoch, Kielan K. W. Bonnefoy, Mickaël Chauvin, Gaël Absil, Olivier Balmer, William O. Boccaletti, Anthony Bonavita, Mariangela Booth, Mark Bowler, Brendan P. Briesemeister, Zackery W. Bryan, Marta L. Calissendorff, Per Cantalloube, Faustine Chen, Christine H. Choquet, Elodie Christiaens, Valentin Cugno, Gabriele Currie, Thayne Danielski, Camilla De Furio, Matthew Dupuy, Trent J. Factor, Samuel M. Faherty, Jacqueline K. Fitzgerald, Michael P. Fortney, Jonathan J. Franson, Kyle Girard, Julien H. Grady, Carol A. Henning, Thomas Hines, Dean C. Hood, Callie E. Howe, Alex R. Kalas, Paul Kammerer, Jens Kennedy, Grant M. Kenworthy, Matthew A. Kervella, Pierre Kim, Minjae Kitzmann, Daniel Kraus, Adam L. Kuzuhara, Masayuki Lagage, Pierre-Olivier Lagrange, Anne-Marie Lawson, Kellen Lazzoni, Cecilia Leisenring, Jarron M. Lew, Ben W. P. Liu, Michael C. Liu, Pengyu Llop-Sayson, Jorge Lloyd, James P. Macintosh, Bruce Mâlin, Mathilde Manjavacas, Elena Marino, Sebastián Marley, Mark S. Marois, Christian Martinez, Raquel A. Matthews, Elisabeth C. Matthews, Brenda C. Mawet, Dimitri Mazoyer, Johan McElwain, Michael W. Metchev, Stanimir Meyer, Michael R. Millar-Blanchaer, Maxwell A. Mollière, Paul Moran, Sarah E. Mukherjee, Sagnick Pantin, Eric Perrin, Marshall D. Pueyo, Laurent Quanz, Sascha P. Quirrenbach, Andreas Ray, Shrishmoy Rebollido, Isabel Redai, Jea Adams Ren, Bin B. Rickman, Emily Sallum, Steph Samland, Matthias Sargent, Benjamin Schlieder, Joshua E. Stapelfeldt, Karl R. Tamura, Motohide Tan, Xianyu Theissen, Christopher A. Uyama, Taichi Vasist, Malavika Vigan, Arthur Wagner, Kevin Ward-Duong, Kimberly Wolff, Schuyler G. Worthen, Kadin Wyatt, Mark C. Ygouf, Marie Zurlo, Alice Zhang, Xi Zhang, Keming Zhan, Zhoujian Zhou, Yifan
contents	The unprecedented medium-resolution (R~1500-3500) near- and mid-infrared (1-18um) spectrum provided by JWST for the young (140+/-20Myr) low-mass (12-20MJup) L-T transition (L7) companion VHS1256b gives access to a catalogue of molecular absorptions. In this study, we present a comprehensive analysis of this dataset utilizing a forward modelling 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, gamma, 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 VHS1256b, 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 VHS1256b 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.
format	Preprint
id	arxiv_https___arxiv_org_abs_2312_03852
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	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 b Petrus, Simon Whiteford, Niall Patapis, Polychronis Biller, Beth A. Skemer, Andrew Hinkley, Sasha Suárez, Genaro Lueber, Anna Palma-Bifani, Paulina Stone, Jordan M. Vos, Johanna M. Morley, Caroline V. Tremblin, Pascal Charnay, Benjamin Helling, Christiane Miles, Brittany E. Carter, Aarynn L. Wang, Jason J. Janson, Markus Gonzales, Eileen C. Sutlieff, Ben Hoch, Kielan K. W. Bonnefoy, Mickaël Chauvin, Gaël Absil, Olivier Balmer, William O. Boccaletti, Anthony Bonavita, Mariangela Booth, Mark Bowler, Brendan P. Briesemeister, Zackery W. Bryan, Marta L. Calissendorff, Per Cantalloube, Faustine Chen, Christine H. Choquet, Elodie Christiaens, Valentin Cugno, Gabriele Currie, Thayne Danielski, Camilla De Furio, Matthew Dupuy, Trent J. Factor, Samuel M. Faherty, Jacqueline K. Fitzgerald, Michael P. Fortney, Jonathan J. Franson, Kyle Girard, Julien H. Grady, Carol A. Henning, Thomas Hines, Dean C. Hood, Callie E. Howe, Alex R. Kalas, Paul Kammerer, Jens Kennedy, Grant M. Kenworthy, Matthew A. Kervella, Pierre Kim, Minjae Kitzmann, Daniel Kraus, Adam L. Kuzuhara, Masayuki Lagage, Pierre-Olivier Lagrange, Anne-Marie Lawson, Kellen Lazzoni, Cecilia Leisenring, Jarron M. Lew, Ben W. P. Liu, Michael C. Liu, Pengyu Llop-Sayson, Jorge Lloyd, James P. Macintosh, Bruce Mâlin, Mathilde Manjavacas, Elena Marino, Sebastián Marley, Mark S. Marois, Christian Martinez, Raquel A. Matthews, Elisabeth C. Matthews, Brenda C. Mawet, Dimitri Mazoyer, Johan McElwain, Michael W. Metchev, Stanimir Meyer, Michael R. Millar-Blanchaer, Maxwell A. Mollière, Paul Moran, Sarah E. Mukherjee, Sagnick Pantin, Eric Perrin, Marshall D. Pueyo, Laurent Quanz, Sascha P. Quirrenbach, Andreas Ray, Shrishmoy Rebollido, Isabel Redai, Jea Adams Ren, Bin B. Rickman, Emily Sallum, Steph Samland, Matthias Sargent, Benjamin Schlieder, Joshua E. Stapelfeldt, Karl R. Tamura, Motohide Tan, Xianyu Theissen, Christopher A. Uyama, Taichi Vasist, Malavika Vigan, Arthur Wagner, Kevin Ward-Duong, Kimberly Wolff, Schuyler G. Worthen, Kadin Wyatt, Mark C. Ygouf, Marie Zurlo, Alice Zhang, Xi Zhang, Keming Zhan, Zhoujian Zhou, Yifan Earth and Planetary Astrophysics The unprecedented medium-resolution (R~1500-3500) near- and mid-infrared (1-18um) spectrum provided by JWST for the young (140+/-20Myr) low-mass (12-20MJup) L-T transition (L7) companion VHS1256b gives access to a catalogue of molecular absorptions. In this study, we present a comprehensive analysis of this dataset utilizing a forward modelling 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, gamma, 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 VHS1256b, 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 VHS1256b 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.
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 b
topic	Earth and Planetary Astrophysics
url	https://arxiv.org/abs/2312.03852