Published 2023
| Version v1
Journal article
The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256–1257 b
Creators
- Miles, Brittany
- Biller, Beth
- Patapis, Polychronis
- Worthen, Kadin
- Rickman, Emily
- Hoch, Kielan
- Skemer, Andrew
- Perrin, Marshall
- Whiteford, Niall
- Chen, Christine
- Sargent, B
- Mukherjee, Sagnick
- Morley, Caroline
- Moran, Sarah
- Bonnefoy, Mickael
- Petrus, Simon
- Carter, Aarynn
- Choquet, Elodie
- Hinkley, Sasha
- Ward-Duong, Kimberly
- Leisenring, Jarron
- Millar-Blanchaer, Maxwell
- Pueyo, Laurent
- Ray, Shrishmoy
- Sallum, Steph
- Stapelfeldt, Karl
- Stone, Jordan
- Wang, Jason
- Absil, Olivier
- Balmer, William
- Boccaletti, Anthony
- Bonavita, Mariangela
- Booth, Mark
- Bowler, Brendan
- Chauvin, Gael
- Christiaens, Valentin
- Currie, Thayne
- Danielski, Camilla
- Fortney, Jonathan
- Girard, Julien
- Grady, Carol
- Greenbaum, Alexandra
- Henning, Thomas
- Hines, Dean
- Janson, Markus
- Kalas, Paul
- Kammerer, Jens
- Kennedy, Grant
- Kenworthy, Matthew
- Kervella, Pierre
- Lagage, Pierre-Olivier
- Lew, Ben
- Liu, Michael
- Macintosh, Bruce
- Marino, Sebastian
- Marley, Mark
- Marois, Christian
- Matthews, Elisabeth
- Matthews, Brenda
- Mawet, Dimitri
- Mcelwain, Michael
- Metchev, Stanimir
- Meyer, Michael
- Molliere, Paul
- Pantin, Eric
- Quirrenbach, Andreas
- Rebollido, Isabel
- Ren, Bin
- Schneider, Glenn
- Vasist, Malavika
- Wyatt, Mark
- Zhou, Yifan
- Briesemeister, Zackery
- Bryan, Marta
- Calissendorff, Per
- Cantalloube, Faustine
- Cugno, Gabriele
- de Furio, Matthew
- Dupuy, Trent
- Factor, Samuel
- Faherty, Jacqueline
- Fitzgerald, Michael
- Franson, Kyle
- Gonzales, Eileen
- Hood, Callie
- Howe, Alex
- Kraus, Adam
- Kuzuhara, Masayuki
- Lagrange, Anne-Marie
- Lawson, Kellen
- Lazzoni, Cecilia
- Liu, Pengyu
- Llop-Sayson, Jorge
- Lloyd, James
- Martinez, Raquel
- Mazoyer, Johan
- Quanz, Sascha
- Redai, Jea
- Samland, Matthias
- Schlieder, Joshua
- Tamura, Motohide
- Tan, Xianyu
- Uyama, Taichi
- Vigan, Arthur
- Vos, Johanna
- Wagner, Kevin
- Wolff, Schuyler
- Ygouf, Marie
- Zhang, Xi
- Zhang, Keming
- Zhang, Zhoujian
Contributors
Others:
- University of California [Santa Cruz] (UC Santa Cruz) ; University of California (UC)
- University of Edinburgh
- Departement Erdwissenschaften [ETH Zürich] (D-ERDW) ; Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)
- Johns Hopkins University (JHU)
- Space Telescope Science Institute (STSci)
- University of California [San Diego] (UC San Diego) ; University of California (UC)
- Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) ; Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France
- Laboratoire d'Astrophysique de Marseille (LAM) ; Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
- Université de Liège
- Observatoire de la Côte d'Azur (OCA) ; Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
- Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Description
We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a <20 M Jup widely separated (∼8″, a = 150 au), young, planetary-mass companion that shares photometric colors and spectroscopic features with the directly imaged exoplanets HR 8799c, d, and e. As an L-toT transition object, VHS 1256 b exists along the region of the color-magnitude diagram where substellar atmospheres transition from cloudy to clear. We observed VHS 1256 b with JWSTʼs NIRSpec IFU and MIRI MRS modes for coverage from 1 to 20 μm at resolutions of ∼1000-3700. Water, methane, carbon monoxide, carbon dioxide, sodium, and potassium are observed in several portions of the JWST spectrum based on comparisons from template brown dwarf spectra, molecular opacities, and atmospheric models. The spectral shape of VHS 1256 b is influenced by disequilibrium chemistry and clouds. We directly detect silicate clouds, the first such detection reported for a planetary-mass companion. Unified Astronomy Thesaurus concepts: Brown dwarfs (185); Exoplanet atmospheres (487); Extrasolar gaseous giant planets (509)
Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.science/hal-04086305
- URN
- urn:oai:HAL:hal-04086305v1
Origin repository
- Origin repository
- UNICA