The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b
We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a $<$20 M$_\mathrm{Jup}$ widely separated ($\sim$8\arcsec, a = 150 au), young, planetary-mass companion that shares photometric colors and spectroscopic features with the directly imaged exoplanets HR 8799 c, d, and e. As an L-to-T 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 \textit{JWST}'s NIRSpec IFU and MIRI MRS modes for coverage from 1 $\mu$m to 20 $\mu$m at resolutions of $\sim$1,000 - 3,700. Water, methane, carbon monoxide, carbon dioxide, sodium, and potassium are observed in several portions of the \textit{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.
Jarron M. Leisenring、Per Calissendorff、Eileen C. Gonzales、Gael Chauvin、Michael P. Fitzgerald、Beth A. Biller、Andrew Skemer、Sascha P. Quanz、Jason J. Wang、Thomas Henning、Anthony Boccaletti、Aarynn L. Carter、Xianyu Tan、William O. Balmer、Matthew De Furio、Andreas Quirrenbachm Isabel Rebollido、Zackery W. Briesemeister、Matthias Samland、Alex R. Howe、Karl R. Stapelfeldt、Johanna M. Vos、Gabriele Cugno、Paul Molliere、Brendan P. Bowler、Elodie Choquet、Bin B. Ren、Keming Zhang、Kyle Franson、Christine H. Chen、Faustine Catalloube、Kielan K. W. Hoch、Joshua E. Schlieder、Sarah E. Moran、Emily Rickman、Jens Kammerer、Jonathan J. Fortney、Schuyler G. Wolff、Sagnick Mukherjee、Dimitri Mawet、Maxwell A. Millar-Blanchaer、Mariangela Bonavita、Sasha Hinkley、Shrishmoy Ray、Kevin Wagner、Samuel M. Factor、Motohide Tamura、Jordan M. Stone、Elisabeth C. Matthews、Trent J. Dupuy、Caroline V. Morley、Zhoujian Zhang、Pierre-Olivier Lagage、Raquel A. Martinez、Brenda C. Matthews、Kimberly Ward-Duong、Michael R. Meyer、Kellen Lawson、Polychronis Patapis、Stanimir Metchev、Camilla Danielski、Masayuki Kuzuhara、B. Sargent、Christian Marois、Alexandra Z. Greenbaum、Cecilia Lazzoni、Mickael Bonnefoy、Taichi Uyama、Michael C. Liu、Julien H. Girard、Mark C. Wyatt、Paul Kalas、Yifan Zhou、Brittany E. Miles、Marie Ygouf、Valentin Christiaens、Jacqueline K. Faherty、Michael W. McElwain、Pierre Kervella、Malavika Vasist、Simon Petrus、Marshall D. Perrin、Bruce Macintosh、Eric Pantin、Dean C. Hines、Thayne Currie、Jea Adams Redai、Adam L. Kraus、Mark Booth、Niall Whiteford、Kadin Worthen、Laurent Pueyo、Matthew A. Kenworthy、James P. Lloyd、Markus Janson、Pengyu Liu、Johan Mazoyer、Mark S. Marley、Jorge Llop-Sayson、Olivier Absil、Marta L. Bryan、Sebastian Marino、Arthur Vigan、Ben W. P. Lew、Callie E. Hood
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Jarron M. Leisenring,Per Calissendorff,Eileen C. Gonzales,Gael Chauvin,Michael P. Fitzgerald,Beth A. Biller,Andrew Skemer,Sascha P. Quanz,Jason J. Wang,Thomas Henning,Anthony Boccaletti,Aarynn L. Carter,Xianyu Tan,William O. Balmer,Matthew De Furio,Andreas Quirrenbachm Isabel Rebollido,Zackery W. Briesemeister,Matthias Samland,Alex R. Howe,Karl R. Stapelfeldt,Johanna M. Vos,Gabriele Cugno,Paul Molliere,Brendan P. Bowler,Elodie Choquet,Bin B. Ren,Keming Zhang,Kyle Franson,Christine H. Chen,Faustine Catalloube,Kielan K. W. Hoch,Joshua E. Schlieder,Sarah E. Moran,Emily Rickman,Jens Kammerer,Jonathan J. Fortney,Schuyler G. Wolff,Sagnick Mukherjee,Dimitri Mawet,Maxwell A. Millar-Blanchaer,Mariangela Bonavita,Sasha Hinkley,Shrishmoy Ray,Kevin Wagner,Samuel M. Factor,Motohide Tamura,Jordan M. Stone,Elisabeth C. Matthews,Trent J. Dupuy,Caroline V. Morley,Zhoujian Zhang,Pierre-Olivier Lagage,Raquel A. Martinez,Brenda C. Matthews,Kimberly Ward-Duong,Michael R. Meyer,Kellen Lawson,Polychronis Patapis,Stanimir Metchev,Camilla Danielski,Masayuki Kuzuhara,B. Sargent,Christian Marois,Alexandra Z. Greenbaum,Cecilia Lazzoni,Mickael Bonnefoy,Taichi Uyama,Michael C. Liu,Julien H. Girard,Mark C. Wyatt,Paul Kalas,Yifan Zhou,Brittany E. Miles,Marie Ygouf,Valentin Christiaens,Jacqueline K. Faherty,Michael W. McElwain,Pierre Kervella,Malavika Vasist,Simon Petrus,Marshall D. Perrin,Bruce Macintosh,Eric Pantin,Dean C. Hines,Thayne Currie,Jea Adams Redai,Adam L. Kraus,Mark Booth,Niall Whiteford,Kadin Worthen,Laurent Pueyo,Matthew A. Kenworthy,James P. Lloyd,Markus Janson,Pengyu Liu,Johan Mazoyer,Mark S. Marley,Jorge Llop-Sayson,Olivier Absil,Marta L. Bryan,Sebastian Marino,Arthur Vigan,Ben W. P. Lew,Callie E. Hood.The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b[EB/OL].(2022-09-01)[2025-05-25].https://arxiv.org/abs/2209.00620.点此复制
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