학술논문
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High-contrast Imaging of the Exoplanet HIP 65426 b from 2 to 16 μm
Document Type
article
Author
Aarynn L. Carter; Sasha Hinkley; Jens Kammerer; Andrew Skemer; Beth A. Biller; Jarron M. Leisenring; Maxwell A. Millar-Blanchaer; Simon Petrus; Jordan M. Stone; Kimberly Ward-Duong; Jason J. Wang; Julien H. Girard; Dean C. Hines; Marshall D. Perrin; Laurent Pueyo; William O. Balmer; Mariangela Bonavita; Mickael Bonnefoy; Gael Chauvin; Elodie Choquet; Valentin Christiaens; Camilla Danielski; Grant M. Kennedy; Elisabeth C. Matthews; Brittany E. Miles; Polychronis Patapis; Shrishmoy Ray; Emily Rickman; Steph Sallum; Karl R. Stapelfeldt; Niall Whiteford; Yifan Zhou; Olivier Absil; Anthony Boccaletti; Mark Booth; Brendan P. Bowler; Christine H. Chen; Thayne Currie; Jonathan J. Fortney; Carol A. Grady; Alexandra Z. Greebaum; Thomas Henning; Kielan K. W. Hoch; Markus Janson; Paul Kalas; Matthew A. Kenworthy; Pierre Kervella; Adam L. Kraus; Pierre-Olivier Lagage; Michael C. Liu; Bruce Macintosh; Sebastian Marino; Mark S. Marley; Christian Marois; Brenda C. Matthews; Dimitri Mawet; Michael W. McElwain; Stanimir Metchev; Michael R. Meyer; Paul Molliere; Sarah E. Moran; Caroline V. Morley; Sagnick Mukherjee; Eric Pantin; Andreas Quirrenbach; Isabel Rebollido; Bin B. Ren; Glenn Schneider; Malavika Vasist; Kadin Worthen; Mark C. Wyatt; Zackery W. Briesemeister; Marta L. Bryan; Per Calissendorff; Faustine Cantalloube; Gabriele Cugno; Matthew De Furio; Trent J. Dupuy; Samuel M. Factor; Jacqueline K. Faherty; Michael P. Fitzgerald; Kyle Franson; Eileen C. Gonzales; Callie E. Hood; Alex R. Howe; Masayuki Kuzuhara; Anne-Marie Lagrange; Kellen Lawson; Cecilia Lazzoni; Ben W. P. Lew; Pengyu Liu; Jorge Llop-Sayson; James P. Lloyd; Raquel A. Martinez; Johan Mazoyer; Paulina Palma-Bifani; Sascha P. Quanz; Jea Adams Redai; Matthias Samland; Joshua E. Schlieder; Motohide Tamura; Xianyu Tan; Taichi Uyama; Arthur Vigan; Johanna M. Vos; Kevin Wagner; Schuyler G. Wolff; Marie Ygouf; Xi Zhang; Keming Zhang; Zhoujian Zhang
Source
The Astrophysical Journal Letters, Vol 951, Iss 1, p L20 (2023)
Subject
Language
English
ISSN
2041-8213
2041-8205
2041-8205
Abstract
We present JWST Early Release Science coronagraphic observations of the super-Jupiter exoplanet, HIP 65426b, with the Near-Infrared Camera (NIRCam) from 2 to 5 μ m, and with the Mid-Infrared Instrument (MIRI) from 11 to 16 μ m. At a separation of ∼0.″82 (87 ${}_{-31}^{+108}$ au), HIP 65426b is clearly detected in all seven of our observational filters, representing the first images of an exoplanet to be obtained by JWST, and the first-ever direct detection of an exoplanet beyond 5 μ m. These observations demonstrate that JWST is exceeding its nominal predicted performance by up to a factor of 10, depending on separation and subtraction method, with measured 5 σ contrast limits of ∼1 × 10 ^−5 and ∼2 × 10 ^−4 at 1″ for NIRCam at 4.4 μ m and MIRI at 11.3 μ m, respectively. These contrast limits provide sensitivity to sub-Jupiter companions with masses as low as 0.3 M _Jup beyond separations of ∼100 au. Together with existing ground-based near-infrared data, the JWST photometry are fit well by a BT-SETTL atmospheric model from 1 to 16 μ m, and they span ∼97% of HIP 65426b's luminous range. Independent of the choice of model atmosphere, we measure an empirical bolometric luminosity that is tightly constrained between $\mathrm{log}\left({L}_{\mathrm{bol}}/{L}_{\odot }\right)$ = −4.31 and −4.14, which in turn provides a robust mass constraint of 7.1 ± 1.2 M _Jup . In totality, these observations confirm that JWST presents a powerful and exciting opportunity to characterize the population of exoplanets amenable to high-contrast imaging in greater detail.