Periodograms of ESPRESSO time series (RV data and stellar activity indicators). The vertical lines mark the position of the companion (P = 8.781 days, red dashed line) and of the aliases (violet dotted lines). A fainter peak at P = 8.781 days is also observed in the contrast indicator (although not significant), but the periodogram of the RV does not show a significant change after applying a linear detrending with any of the indicators. The 0.1%, 1%, and 10% false alarm probability (FAP) levels for the RV periodogram are shown as dashed green horizontal lines.