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Article Dans Une Revue The Astronomical Journal Année : 2023

JWST/NIRCam Coronagraphy of the Young Planet-hosting Debris Disk AU Microscopii

Kellen Lawson
Joshua Schlieder
Jarron Leisenring
Ell Bogat
Charles Beichman
Geoffrey Bryden
András Gáspár
Tyler Groff
Michael Mcelwain
Michael Meyer
Thomas Barclay
Per Calissendorff
Matthew de Furio
Marie Ygouf
Thomas Greene
John Krist
  • Fonction : Auteur
Peter Plavchan
Marcia Rieke
Thomas Roellig
John Stansberry
John Wisniewski
Erick Young

Résumé

Abstract High-contrast imaging of debris disk systems permits us to assess the composition and size distribution of circumstellar dust, to probe recent dynamical histories, and to directly detect and characterize embedded exoplanets. Observations of these systems in the infrared beyond 2–3 μ m promise access to both extremely favorable planet contrasts and numerous scattered-light spectral features—but have typically been inhibited by the brightness of the sky at these wavelengths. We present coronagraphy of the AU Microscopii (AU Mic) system using JWST’s Near Infrared Camera (NIRCam) in two filters spanning 3–5 μ m. These data provide the first images of the system’s famous debris disk at these wavelengths and permit additional constraints on its properties and morphology. Conducting a deep search for companions in these data, we do not identify any compelling candidates. However, with sensitivity sufficient to recover planets as small as ∼0.1 Jupiter masses beyond ∼2″ (∼20 au) with 5 σ confidence, these data place significant constraints on any massive companions that might still remain at large separations and provide additional context for the compact, multiplanet system orbiting very close-in. The observations presented here highlight NIRCam’s unique capabilities for probing similar disks in this largely unexplored wavelength range, and they provide the deepest direct imaging constraints on wide-orbit giant planets in this very well-studied benchmark system.
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hal-04268671 , version 1 (03-11-2023)

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Kellen Lawson, Joshua Schlieder, Jarron Leisenring, Ell Bogat, Charles Beichman, et al.. JWST/NIRCam Coronagraphy of the Young Planet-hosting Debris Disk AU Microscopii. The Astronomical Journal, 2023, 166 (4), pp.150. ⟨10.3847/1538-3881/aced08⟩. ⟨hal-04268671⟩
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