Open Access

Fig. 7


Total cross-correlation signal from carbon monoxide in transmission spectrum of HD 189733 b, as function of stellar removal applied to data. Left panel: uncorrected spectra show a candidate signal at expected planet maximum orbital velocity (KP ~ 151 km s−1, white dashed lines), but also significant stellar contamination at all values of KP from uncorrected CO stellar lines. Middle panel: application of a parametric 1D stellar model partially mitigates the problem and allows recovery of the CO signal at 5σ (Brogi et al. 2016). There is, however, still a residual stellar signal that hinders detection. Right panel: application of phase-resolved 3D stellar models accounting for the geometry of transit (this work and Flowers et al. 2019) allows us to unambiguosly detect the planet CO signal at > 7σ of confidence level.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.