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A Second Visit to Eps Ind Ab with JWST: New Photometry Confirms Ammonia and Suggests Thick Clouds in the Exoplanet Atmosphere of the Closest Super-Jupiter

  • Authors: Elisabeth C. Matthews, James Mang, Aarynn L. Carter, Mathlide Mâlin, Caroline V. Morley, Bhavesh Rajpoot, Leindert A. Boogaard, Jennifer A. Burt, Ian J. M. Crossfield, Fabo Feng, Anne- Marie Lagrange, Mark W. Phillips

Elisabeth C. Matthews et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure 4.

The same as Figure 3 but for models with a range of metallicities. While a significantly subsolar metallicity would explain the shallow ammonia feature of Eps Ind Ab (left), the models with the lowest metallicity have the brightest NaCo L’ magnitude. Subsolar metallicity is not (by itself) sufficient to explain the in-hand photometric constraints for Eps Ind Ab. All plotted metals have solar C/O and Kzz = 107 cm−2 s−1, and the model with [Fe/H] = 0 (identical to Figure 3) is highlighted with a dashed line.

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