Spectroscopic time series and GLS periodograms. Left: HARPS-N spectroscopic time series used in this work. The time series for RV, BIS. , Hα, FWHM, and W_CCF are shown in the panels in order from top to bottom. Right: GLS periodogram of the RVs and the spectroscopic activity indicators under analysis. The primary peak of each periodogram is indicated by a vertical orange line. The dotted green lines represent the stellar rotation period described in Sect. 2.2. The signals along the red dotted vertical lines correspond to the transit-like signals with periods 4.77 and 10.59 d.