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
[en] 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<SUP>-5</SUP> and ~2 × 10<SUP>-4</SUP> 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 <SUB>Jup</SUB> 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 <SUB>Jup</SUB>. 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Carter, Aarynn L.; University of California, Santa Cruz, Department of Astronomy and Astrophysics
Hinkley, Sasha; University of Exeter, Department of Physics and Astronomy
Kammerer, Jens; Space Telescope Science Institute, Baltimore, Maryland
Skemer, Andrew; University of California, Santa Cruz, Department of Astronomy and Astrophysics
Biller, Beth A.; Scottish Universities Physics Alliance, University of Edinburgh, UK
Leisenring, Jarron M.; University of Arizona, Department of Astronomy and Steward Observatory
Millar-Blanchaer, Maxwell A.; University of California, Santa Barbara, Department of Physics and Astronomy
Petrus, Simon; Valparaiso University, Department of Physics and Astronomy, -
Stone, Jordan M.; Naval Research Laboratory, Remote Sensing Division, 4555 Overlook Ave SW, Washington, DC 20375, USA
Ward-Duong, Kimberly; Smith College, Massachusetts
Wang, Jason J.; Northwestern University, Department of Physics and Astronomy, California Institute of Technology, Division of Physics, Mathematics and Astronomy
Girard, Julien H.; Space Telescope Science Institute, Baltimore, Maryland
Hines, Dean C.; Space Telescope Science Institute, Baltimore, Maryland
Perrin, Marshall D.; Space Telescope Science Institute, Baltimore, Maryland
Pueyo, Laurent; Space Telescope Science Institute, Baltimore, Maryland
Balmer, William O.; Space Telescope Science Institute, Baltimore, Maryland, Johns Hopkins University, Department of Physics and Astronomy
Bonavita, Mariangela; Open University, Department of Physical Sciences
Bonnefoy, Mickael; Institute de Planetologie et d'Astrophysique de Grenoble
Chauvin, Gael; Laboratoire J.-L. Lagrange, Université Cote d'Azur, CNRS, Observatoire de la Cote d'Azur, F-06304 Nice, France
Christiaens, Valentin ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Danielski, Camilla; Institute of Astrophysics of Andalusia
Kennedy, Grant M.; University of Warwick, Department of Physics
Matthews, Elisabeth C.; Max-Planck-Institute for Astronomy, Heidelberg
Miles, Brittany E.; University of California, Santa Cruz, Department of Astronomy and Astrophysics
Patapis, Polychronis; ETH Zurich, Department of Physics
Ray, Shrishmoy; University of Exeter, Department of Physics and Astronomy
Rickman, Emily; Space Telescope Science Institute, ESA Office, Baltimore, Maryland
Sallum, Steph; University of California, Irvine, Department of Physics and Astronomy
Stapelfeldt, Karl R.; Jet Propulsion Laboratory
Whiteford, Niall; American Museum of Natural History, New York
Zhou, Yifan; University of Texas, Austin, Department of Astronomy
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Bowler, Brendan P.; University of Texas, Austin, Department of Astronomy
Chen, Christine H.; Space Telescope Science Institute, Baltimore, Maryland, Johns Hopkins University, Department of Physics and Astronomy
Currie, Thayne; University of Texas, San Antonio, Department of Physics and Astronomy, Subaru Telescope
Fortney, Jonathan J.; University of California, Santa Cruz, Department of Astronomy and Astrophysics
Grady, Carol A.; Eureka Scientific, 2452 Delmer. St., Suite 1, Oakland CA, 96402, USA
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Kraus, Adam L.; University of Texas, Austin, Department of Astronomy
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Liu, Michael C.; University of Hawaii, Manoa, Institute for Astronomy
Macintosh, Bruce; Kavli Institute for Particle Astrophysics and Cosmology, California
Marino, Sebastian; University of Cambridge, UK, University of Cambridge, Institute of Astronomy
Marley, Mark S.; Dept. of Planetary Sciences, Lunar &, Planetary Laboratory, Univ. of Arizona, Tucson, AZ 85721, USA
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Mawet, Dimitri; California Institute of Technology, Division of Physics, Mathematics and Astronomy, Jet Propulsion Laboratory
McElwain, Michael W.; NASA Goddard Space Flight Center, Maryland
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Meyer, Michael R.; University of Michigan, Department of Astronomy
Molliere, Paul; Max-Planck-Institute for Astronomy, Heidelberg
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Morley, Caroline V.; University of Texas, Austin, Department of Astronomy
Mukherjee, Sagnick; University of California, Santa Cruz, Department of Astronomy and Astrophysics
Pantin, Eric; Institut de Recherche sur les Lois Fondamentales de l'Universe
Quirrenbach, Andreas; University of Heidelberg, Astronomical Observatory
Rebollido, Isabel; Space Telescope Science Institute, Baltimore, Maryland
Ren, Bin B.; Institute de Planetologie et d'Astrophysique de Grenoble
Schneider, Glenn; University of Arizona, Department of Astronomy and Steward Observatory
Vasist, Malavika Vijayendra ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Worthen, Kadin; Johns Hopkins University, Department of Physics and Astronomy
Wyatt, Mark C.; University of Cambridge, Institute of Astronomy
Briesemeister, Zackery W.; NASA Goddard Space Flight Center, Maryland
Bryan, Marta L.; University of California, Berkeley, Department of Astronomy
Calissendorff, Per; University of Michigan, Department of Astronomy
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Cugno, Gabriele; University of Michigan, Department of Astronomy
De Furio, Matthew; University of Michigan, Department of Astronomy
Dupuy, Trent J.; Royal Observatory Edinburgh
Factor, Samuel M.; University of Texas, Austin, Department of Astronomy
Faherty, Jacqueline K.; American Museum of Natural History, New York
Fitzgerald, Michael P.; University of California, Los Angeles
Franson, Kyle; University of Texas, Austin, Department of Astronomy
Gonzales, Eileen C.; Cornell University, Department of Astronomy/Center for Radiophysics and Space Research
Hood, Callie E.; University of California, Santa Cruz, Department of Astronomy and Astrophysics
Howe, Alex R.; NASA Goddard Space Flight Center, Maryland
Kuzuhara, Masayuki; Astrobiology Center, Japan
Lagrange, Anne-Marie; Observatoire de Paris, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
Lawson, Kellen; NASA Goddard Space Flight Center, Maryland
Lazzoni, Cecilia; University of Exeter, Department of Physics and Astronomy
Lew, Ben W. P.; NASA Ames Research Center
Liu, Pengyu; Scottish Universities Physics Alliance, University of Edinburgh, UK
Llop-Sayson, Jorge; California Institute of Technology, Division of Physics, Mathematics and Astronomy
Lloyd, James P.; Cornell University, Department of Astronomy/Center for Radiophysics and Space Research
Martinez, Raquel A.; University of California, Irvine, Department of Physics and Astronomy
Mazoyer, Johan; Observatoire de Paris, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
Palma-Bifani, Paulina; Laboratoire J.-L. Lagrange, Université Cote d'Azur, CNRS, Observatoire de la Cote d'Azur, F-06304 Nice, France
Quanz, Sascha P.; ETH Zurich, Department of Physics
Redai, Jea Adams; Harvard Smithsonian Center for Astrophysics
Samland, Matthias; Max-Planck-Institute for Astronomy, Heidelberg
Schlieder, Joshua E.; NASA Goddard Space Flight Center, Maryland
Tamura, Motohide; University of Tokyo, Japan
Tan, Xianyu; University of Oxford, Department of Physics
Uyama, Taichi; Infrared Processing and Analysis Center
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
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