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 | Instituto de Astrofísica de Andalucía

DOI:

10.3847/2041-8213/acd93e

Publication date:

31/07/2023

Main author:

Carter, Aarynn L.

IAA authors:

Danielski, Camilla

Authors:

Carter, Aarynn L.;Hinkley, Sasha;Kammerer, Jens;Skemer, Andrew;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;Bonnefoy, Mickael;Chauvin, Gael;Choquet, Elodie;Christiaens, Valentin;Danielski, Camilla;Kennedy, Grant M.;Matthews, Elisabeth C.;Miles, Brittany E.;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.;Grady, Carol A.;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.;Marois, Christian;Matthews, Brenda C.;Mawet, Dimitri;McElwain, Michael W.;Metchev, Stanimir;Meyer, Michael R.;Molliere, Paul;Moran, Sarah E.;Morley, Caroline V.;Mukherjee, Sagnick;Pantin, Eric;Quirrenbach, Andreas;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;De Furio, Matthew;Dupuy, Trent J.;Factor, Samuel M.;Faherty, Jacqueline K.;Fitzgerald, Michael P.;Franson, Kyle;Gonzales, Eileen C.;Hood, Callie E.;Howe, Alex R.;Kuzuhara, Masayuki;Lagrange, Anne-Marie;Lawson, Kellen;Lazzoni, Cecilia;Lew, Ben W. P.;Liu, Pengyu;Llop-Sayson, Jorge;Lloyd, James P.;Martinez, Raquel A.;Mazoyer, Johan;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

Journal:

Astrophysical Journal Letters

Publication type:

Article

Volume:

951

Pages:

L20

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 μm, and with the Mid-Infrared Instrument (MIRI) from 11 to 16 μm. 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 μm. 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 5σ contrast limits of ~1 × 10-5 and ~2 × 10-4 at 1″ for NIRCam at 4.4 μm and MIRI at 11.3 μm, respectively. These contrast limits provide sensitivity to sub-Jupiter companions with masses as low as 0.3M 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 μm, 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.

Database:

ADS

URL:

https://ui.adsabs.harvard.edu/#abs/2023ApJ...951L..20C/abstract

ADS Bibcode:

2023ApJ...951L..20C

Keywords:

Exoplanets;Exoplanet astronomy;Extrasolar gaseous planets;498;486;2172;Astrophysics - Earth and Planetary Astrophysics