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Heat Reveals What Clouds Conceal: Global Carbon and Longitudinally Asymmetric Chemistry on LTT 9779 b

  • Authors: Reza Ashtari, Sean Collins, Jared Splinter, Kevin B. Stevenson, Vivien Parmentier, Jonathan Brande, Suman Saha, Sarah Stamer, Ian J. M. Crossfield, James S. Jenkins, K. Angelique Kahle, Joshua D. Lothringer, Nishil Mehta, Nicolas B. Cowan, Diana Dragomir, Laura Kreidberg, Mercedes López-Morales, Thomas M. Evans-Soma, Emma Esparza-Borges, Megan Weiner Mansfield, Hayley Beltz, Tansu Daylan, Olivia Venot, Jason Pero, Xi Zhang

Reza Ashtari et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure B4.

Comparison of the free retrieved and chemical equilibrium volume mixing ratios (VMR’s) for LTT 9779 b’s dayside across the pressure range probed in emission (∼0 to −3.5 in ﹩{\mathrm{log}}_{10}(P\,[{\rm{bar}}])﹩; see Figure 3). Ribboned regions show the free retrieval 1σ ranges for H2O, CO2, CO, CH4, and SO2; solid curves show the corresponding chemical equilibrium profiles. CO2 exhibits close agreement between approaches over the full pressure interval. For CO and H2O, the equilibrium solutions track the upper edge of the free posteriors, supporting the interpretation that median free values are effectively upper limits set by the data. CH4 and SO2 remain low in both frameworks.

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