Details

Autor(en) / Beteiligte

• 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

Titel

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

Ist Teil von

• Astrophysical journal. Letters, 2023-07, Vol.951 (1), p.L20

Ort / Verlag

Austin: The American Astronomical Society

Erscheinungsjahr

2023

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.