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Magnesium Silicate Clouds in the Atmosphere of HD 209458b from a Rule-based Tree-structured Data Reduction

  • Authors: Katy L. Chubb, David Grant, Hannah R. Wakeford, Sarah E. Moran, Natasha E. Batalha, Arika Egan, Charlotte Fairman, Diana Powell, Kevin B. Stevenson, Lili Alderson, Peter Gao, Tiffany Kataria, Nikole K. Lewis, Ryan J. MacDonald, Mark Marley, Elijah Mullens, David K. Sing, Jeff A. Valenti

Katy L. Chubb et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 6.

Free retrieval of the LRS+NIRCam+HST spectra using amorphous Mg2SiO4 (“cloudy,” orange), Mg2SiO4+MgSiO3 (“combo,” purple), and a clear atmosphere (blue). The residuals for each model are given in the panel beneath, followed by the offset of the observations used in the retrievals compared to the unscaled observations (where NIRCam is kept anchored). The posterior panels use the labels described in Table 2, with the median values listed in the following order: Mg2SiO4 (orange), Mg2SiO4+MgSiO3 (purple), and clear (blue), where applicable.

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