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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 11.

Plots from our ephemeris fitting for LTT 9779 b. Top: observed minus calculated (OC) plots for all transit and eclipse midtimes. The reference epoch is set to be halfway between the first and last transit used in this work. Traces from all three models, linear (gray), decay (red), and precession (turquoise), are also shown. Middle: OC plots once the Spitzer transits have been discarded. In doing so, all evidence for nonlinear ephemerides is also removed. Bottom: fit to the literature radial velocity data. For brevity, we only show the best-fit model to this data when considering a constant period and when the Spitzer transit midtimes have been discarded, which we adopt as our favored model. However, these data are used in all our fits.

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