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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 16.

The orbital period derivative in milliseconds per year expected for LTT 9779 b given different values of the modified stellar tidal quality factor ﹩{Q}_{* }^{{\prime} }﹩. The right-hand vertical axis shows the expected OC signal over the current observational baseline and the gray shaded region represents the average timing uncertainty of the data. Three values of ﹩{Q}_{* }^{{\prime} }﹩ are highlighted: (1) derived with Equation (11) from the best-fit orbital decay rate when the Spitzer transit timings were included, (2) predicted with Equation (13) from the tidal forcing period of the system, and (3) the value for WASP-12 from Wong et al. (2022).

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