From top to bottom: Lomb-Scargle periodograms for the RV, v sin i, and v_macro time series for the same three helium lines. In each panel, the dashed blue lines indicate the significant periods extracted for each spectroscopic time series using the pre-whitening method described in Sect. 3, the black circles indicate the pulsation periods extracted from the TESS light curve, and the red triangles correspond to the pulsation periods from ground-based and MOST photometry reported by Walker et al. (2005).