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GEMS JWST: HATS-75 b A Giant Planet with a Subsolar Metallicity Atmosphere Orbiting an M Dwarf

  • Authors: Reza Ashtari, Jacob Lustig-Yaeger, Jessica Libby-Roberts, Simon Müller, Shubham Kanodia, Kevin B. Stevenson, Caleb I. Cañas, Giannina Guzmán Caloca, Nicole L. Wallack, Megan Delamer, Anjali A. A. Piette, Suvrath Mahadevan, Ian Czekala, Te Han, Ravit Helled

Reza Ashtari et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 1.

White light curves and best-fit transit models for Visits 1 (top), 2 (middle), and 3 (bottom) of the optimized Eureka!+fleck dataset. Residuals for the model-fits are provided below the light curve of the same transit to show time-correlated noise. The bump near the ingress of Visit 1, to the left of the transit center (∼1.92 + 6.053e4 MJD), represents the starspot illustrated in the top plot of Figure 2. Similarly, the raised feature near the egress of Visit 2, to the right of the transit center (∼0.54 + 6.0537e4 MJD), represents the starspot illustrated in the bottom subfigure of Figure 2. ﹩{\chi }_{\nu }^{2}﹩ and scatter multiplier values, κscatter (T. Bell et al. 2022; B. M. Morris 2022), are provided as metrics for the model-fit and necessary error inflation (to planet radius estimates) during light-curve fitting.

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