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JWST Spectral Retrieval of Cold Directly Imaged Planet WD 0806 b and the First Measurement of Altitude-dependent Kzz in Exoplanet Atmospheres

  • Authors: Ben W.P. Lew, Thomas Roellig, Natasha E. Batalha, Nicholas F. Wogan, Thomas Greene, Mark S. Marley, Jonathan J. Fortney, Jarron Leisenring, Doug Johnstone, Matthew De Furio, Klaus Hodapp, Charles Beichman, Marcia Rieke

Ben W.P. Lew et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 11.

Left panel: a comparison of the absolute C/O ratio of WD 0806 b (red star) to the nearby (<40 pc) solar neighborhood population from the Hypatia catalog (N. R. Hinkel et al. 2014) shows that the elevated C/O ratio is consistent with nearby stellar chemical abundances within 2σ. Right panel: the same as the left panel, but for the C/S ratio. The C/S ratio of WD 0806 b is within 1σ to the nearby stellar chemical abundances.

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