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Validation of TOI-1221 b: A Warm Sub-Neptune Exhibiting Transit Timing Variations around a Sun-like Star

  • Authors: Christopher Mann, David Lafreniére, Diana Dragomir, Samuel N. Quinn, Thiam-Guan Tan, Karen A. Collins, Steve B. Howell, Carl Ziegler, Andrew W. Mann, Keivan G. Stassun, Martti H. Kristiansen, Hugh Osborn, Tabetha Boyajian, Nora Eisner, Coel Hellier, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Jon M. Jenkins, Jesus Noel Villaseñor, Brian McLean, Pamela Rowden, Guillermo Torres, Douglas A. Caldwell, Kevin I. Collins, Richard P. Schwarz

Christopher Mann et al 2023 The Astronomical Journal 165 .

  • Provider: AAS Journals

Caption: Figure 7.

Top: midpoint timing distributions from Figure 6 plotted across time. The width of the blue region indicates the posterior probability distribution. The purple curves show sinusoid fits to 1000 random draws of these distributions. The timings display a sinusoidal variation suggestive of systematic TTVs. Bottom: distributions of the amplitude and periodicity from fitting 105 random draws. A zero-amplitude line (i.e., fixed-period ephemeris) is disfavored at 5.7σ.

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