GLS periodograms of the spectral activity indicators from HIRES (blue) and CARMENES (orange) data. For each panel, the horizontal lines show the theoretical 10% (short-dashed line), 1% (long-dashed line), and 0.1% (dot-dashed line) FAP levels. The vertical dashed lines mark the orbital frequencies of the transiting planets (f_b = 0.361 d⁻¹, f_c = 0.175 d⁻¹) and of the stellar rotation signal at 0.0266 d⁻¹. Panels a–h: chromatic index (CRX), differential line width (dLW), Hα, Na doublet, and Ca infrared triplet lines computed with serval from CARMENES data. Panel i: R′_HK index computed by Perdelwitz et al. (2021) from HIRES data.