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Carter, Aarynn L.; Hinkley, Sasha; Kammerer, Jens; Biller, Beth A.; Leisenring, Jarron M.; Millar-Blanchaer, Maxwell A.; Petrus, Simon; Stone, Jordan M.; Ward-Duong, Kimberly; Wang, Jason J.; Girard, Julien H.; Hines, Dean C.; Perrin, Marshall D.; Pueyo, Laurent; Balmer, William O.; Bonavita, Mariangela; Chauvin, Gael; Choquet, Elodie; Christiaens, Valentin; Danielski, Camilla; Kennedy, Grant M.; Matthews, Elisabeth C.; Patapis, Polychronis; Ray, Shrishmoy; Rickman, Emily; Sallum, Steph; Stapelfeldt, Karl R.; Whiteford, Niall; Zhou, Yifan; Absil, Olivier; Boccaletti, Anthony; Booth, Mark; Bowler, Brendan P.; Chen, Christine H.; Currie, Thayne; Fortney, Jonathan J.; Greebaum, Alexandra Z.; Henning, Thomas; Hoch, Kielan K. W.; Janson, Markus; Kalas, Paul; Kenworthy, Matthew A.; Kervella, Pierre; Kraus, Adam L.; Lagage, Pierre-Olivier; Liu, Michael C.; Macintosh, Bruce; Marino, Sebastian; Marley, Mark S.; Matthews, Brenda C.; Mawet, Dimitri; McElwain, Michael W.; Metchev, Stanimir; Meyer, Michael R.; Moran, Sarah E.; Morley, Caroline V.; Mukherjee, Sagnick; Pantin, Eric; Rebollido, Isabel; Ren, Bin B.; Schneider, Glenn; Vasist, Malavika; Worthen, Kadin; Wyatt, Mark C.; Briesemeister, Zackery W.; Bryan, Marta L.; Calissendorff, Per; Cantalloube, Faustine; Cugno, Gabriele; Dupuy, Trent J.; Factor, Samuel M.; Faherty, Jacqueline K.; Fitzgerald, Michael P.; Franson, Kyle; Gonzales, Eileen C.; Hood, Callie E.; Howe, Alex R.; Lagrange, Anne-Marie; Lawson, Kellen; Lazzoni, Cecilia; Lew, Ben W. P.; Liu, Pengyu; Lloyd, James P.; Martinez, Raquel A.; Palma-Bifani, Paulina; Quanz, Sascha P.; Redai, Jea Adams; Samland, Matthias; Schlieder, Joshua E.; Tamura, Motohide; Tan, Xianyu; Uyama, Taichi; Vigan, Arthur; Vos, Johanna M.; Wagner, Kevin; Wolff, Schuyler G.; Ygouf, Marie; Zhang, Xi; Zhang, Keming; Zhang, Zhoujian
Astrophysical journal. Letters, 07/2023, Letnik: 951, Številka: 1Journal Article, Web Resource
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 log L bol / L ⊙ = −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.
