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Characterizing a World Within the Hot-Neptune Desert: Transit Observations of LTT 9779 b with the Hubble Space Telescope/WFC3

  • Authors: Billy Edwards, Quentin Changeat, Angelos Tsiaras, Andrew Allan, Patrick Behr, Simone R. Hagey, Michael D. Himes, Sushuang Ma, Keivan G. Stassun, Luis Thomas, Alexandra Thompson, Aaron Boley, Luke Booth, Jeroen Bouwman, Kevin France, Nataliea Lowson, Annabella Meech, Caprice L. Phillips, Aline A. Vidotto, Kai Hou Yip, Michelle Bieger, Amélie Gressier, Estelle Janin, Ing-Guey Jiang, Pietro Leonardi, Subhajit Sarkar, Nour Skaf, Jake Taylor, Ming Yang, Derek Ward-Thompson

Billy Edwards et al 2023 The Astronomical Journal 166 .

  • Provider: AAS Journals

Caption: Figure 7.

Retrieved molecular abundances from free chemistry (orange) and chemical equilibrium (purple) retrievals. Our free chemistry retrievals suggest the presence of H2O, CO2, and FeH. They also place upper limits on the abundances of TiO and VO but could not constrain CO or e-. The preferred abundance of CO2 is very different between the models, as is the H2O abundance in the lower atmosphere. The retrieved temperature profiles also slightly differ, but are generally within 1σ.

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