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A Moderate Albedo from Reflecting Aerosols on the Dayside of WASP-80 b Revealed by JWST/NIRISS Eclipse Spectroscopy

  • Authors: Kim Morel, Louis-Philippe Coulombe, Jason F. Rowe, David Lafrenière, Loïc Albert, Étienne Artigau, Nicolas B. Cowan, Lisa Dang, Michael Radica, Jake Taylor, Caroline Piaulet-Ghorayeb, Pierre-Alexis Roy, Björn Benneke, Antoine Darveau-Bernier, Stefan Pelletier, René Doyon, Doug Johnstone, Adam B. Langeveld, Romain Allart, Laura Flagg, Jake D. Turner

Kim Morel et al 2025 The Astronomical Journal 169 .

  • Provider: AAS Journals

Caption: Figure 7.

Reflected light models of WASP-80 b for a variety of cloud species produced with PICASO and VIRGA, considering a Bond albedo of 0.25. The full and dashed lines correspond to models with sedimentation efficiencies fsed of 0.1 and 3, respectively. The models are compared to our measured secondary eclipse spectrum (black and white points, binned by a factor of 2) for wavelengths below 1.6 μm, where the contribution from thermal emission is minimal, as shown by the pink dotted line. The short-wavelength spectrum is best explained by either chromium (Cr), intermediate-sedimentation sodium sulfide (Na2S), potassium chloride (KCl), or low-sedimentation zinc sulfide (ZnS) clouds.

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