Fig. 4

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Simulated transmission light curve of HD 209458 b for passbands centred on any Na I D line with Δλ = 0.4 Å and Δλ= 0.7 Å, showing the RM+CLV effects along with atmospheric absorption. The light-curves are computed in the planet rest frame. The different colours correspond to the same atmospheric models represented in Fig. 2. The ESPRESSO data are the same as reported in Fig. 6 by Casasayas-Barris et al. (2021).
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