he 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
he 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 andspectroscopic 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 thecolor-magnitude diagram where substellar atmospheres transition from cloudy toclear. We observed VHS 1256~b with \textit{JWST}'s NIRSpec IFU and MIRI MRSmodes 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 potassiumare observed in several portions of the \textit{JWST} spectrum based oncomparisons from template brown dwarf spectra, molecular opacities, andatmospheric models. The spectral shape of VHS 1256 b is influenced bydisequilibrium chemistry and clouds. We directly detect silicate clouds, thefirst such detection reported for a planetary-mass companion.
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 andspectroscopic 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 thecolor-magnitude diagram where substellar atmospheres transition from cloudy toclear. We observed VHS 1256~b with \textit{JWST}'s NIRSpec IFU and MIRI MRSmodes 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 potassiumare observed in several portions of the \textit{JWST} spectrum based oncomparisons from template brown dwarf spectra, molecular opacities, andatmospheric models. The spectral shape of VHS 1256 b is influenced bydisequilibrium chemistry and clouds. We directly detect silicate clouds, thefirst such detection reported for a planetary-mass companion.
Cecilia Lazzoni、Kevin Wagner、Jens Kammerer、Yifan Zhou、Joshua E. Schlieder、Xianyu Tan、Matthias Samland、James P. Lloyd、Raquel A. Martinez、Gabriele Cugno、Brendan P. Bowler、Simon Petrus、Pierre Kervella、Ben W. P. Lew、Christine H. Chen、Polychronis Patapis、Sascha P. Quanz、Jacqueline K. Faherty、Jea Adams Redai、Paul Kalas、Laurent Pueyo、Pierre-Olivier Lagage、Jorge Llop-Sayson、Brenda C. Matthews、Bruce Macintosh、Maxwell A. Millar-Blanchaer、Kimberly Ward-Duong、Christian Marois、Eric Pantin、Zackery W. Briesemeister、Mickael Bonnefoy、Samuel M. Factor、Kadin Worthen、Sagnick Mukherjee、Valentin Christiaens、Sebastian Marino、Alex R. Howe、Sasha Hinkley、Elodie Choquet、Johanna M. Vos、Dean C. Hines、Kyle Franson、Schuyler G. Wolff、Callie E. Hood、Keming Zhang、Marta L. Bryan、Markus Janson、Matthew A. Kenworthy、Thayne Currie、Mark Booth、Brittany E. Miles、Trent J. Dupuy、Andreas Quirrenbachm Isabel Rebollido、Johan Mazoyer、Per Calissendorff、Taichi Uyama、Arthur Vigan、William O. Balmer、Thomas Henning、Julien H. Girard、Kielan K. W. Hoch、Matthew De Furio、Malavika Vasist、Mark C. Wyatt、Michael W. McElwain、Eileen C. Gonzales、Michael R. Meyer、Andrew Skemer、Faustine Catalloube、Stanimir Metchev、Dimitri Mawet、Anthony Boccaletti、Pengyu Liu、Emily Rickman、Jason J. Wang、Zhoujian Zhang、Kellen Lawson、Beth A. Biller、Paul Molliere、Michael P. Fitzgerald、Olivier Absil、Aarynn L. Carter、Motohide Tamura、Jarron M. Leisenring、Karl R. Stapelfeldt、Jonathan J. Fortney、Bin B. Ren、Sarah E. Moran、Adam L. Kraus、Masayuki Kuzuhara、Michael C. Liu、Shrishmoy Ray、Marie Ygouf、Gael Chauvin、Jordan M. Stone、Niall Whiteford、Marshall D. Perrin、Elisabeth C. Matthews、Camilla Danielski、Caroline V. Morley、Mark S. Marley、Mariangela Bonavita、Alexandra Z. Greenbaum
天文学
Cecilia Lazzoni,Kevin Wagner,Jens Kammerer,Yifan Zhou,Joshua E. Schlieder,Xianyu Tan,Matthias Samland,James P. Lloyd,Raquel A. Martinez,Gabriele Cugno,Brendan P. Bowler,Simon Petrus,Pierre Kervella,Ben W. P. Lew,Christine H. Chen,Polychronis Patapis,Sascha P. Quanz,Jacqueline K. Faherty,Jea Adams Redai,Paul Kalas,Laurent Pueyo,Pierre-Olivier Lagage,Jorge Llop-Sayson,Brenda C. Matthews,Bruce Macintosh,Maxwell A. Millar-Blanchaer,Kimberly Ward-Duong,Christian Marois,Eric Pantin,Zackery W. Briesemeister,Mickael Bonnefoy,Samuel M. Factor,Kadin Worthen,Sagnick Mukherjee,Valentin Christiaens,Sebastian Marino,Alex R. Howe,Sasha Hinkley,Elodie Choquet,Johanna M. Vos,Dean C. Hines,Kyle Franson,Schuyler G. Wolff,Callie E. Hood,Keming Zhang,Marta L. Bryan,Markus Janson,Matthew A. Kenworthy,Thayne Currie,Mark Booth,Brittany E. Miles,Trent J. Dupuy,Andreas Quirrenbachm Isabel Rebollido,Johan Mazoyer,Per Calissendorff,Taichi Uyama,Arthur Vigan,William O. Balmer,Thomas Henning,Julien H. Girard,Kielan K. W. Hoch,Matthew De Furio,Malavika Vasist,Mark C. Wyatt,Michael W. McElwain,Eileen C. Gonzales,Michael R. Meyer,Andrew Skemer,Faustine Catalloube,Stanimir Metchev,Dimitri Mawet,Anthony Boccaletti,Pengyu Liu,Emily Rickman,Jason J. Wang,Zhoujian Zhang,Kellen Lawson,Beth A. Biller,Paul Molliere,Michael P. Fitzgerald,Olivier Absil,Aarynn L. Carter,Motohide Tamura,Jarron M. Leisenring,Karl R. Stapelfeldt,Jonathan J. Fortney,Bin B. Ren,Sarah E. Moran,Adam L. Kraus,Masayuki Kuzuhara,Michael C. Liu,Shrishmoy Ray,Marie Ygouf,Gael Chauvin,Jordan M. Stone,Niall Whiteford,Marshall D. Perrin,Elisabeth C. Matthews,Camilla Danielski,Caroline V. Morley,Mark S. Marley,Mariangela Bonavita,Alexandra Z. Greenbaum.he 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].(2023-02-19)[2025-06-19].https://chinaxiv.org/abs/202303.03668.点此复制
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