Properties of rotational modulations and radial (l = 0) modes near the frequency at maximum amplitude ν_max. Top panel: photometric magnetic activity level proxy S_ph (%) as a function of orbital period (days). The S_ph values are given in Tables B.1 and 4. Middle panel: relative difference in between expected and measured oscillation amplitudes (%) as a function of orbital period P_orb (days). The red line indicates 0, i.e., stars whose oscillations are not detected. The two dashed blue lines represent the region in which relative mode amplitude lies for systems with orbital periods longer than 180 days within two sigma. Bottom panel: mode width Γ_max (μHz) as a function of orbital period P_orb (d). In all panels the size of each symbol represents the amplitude of stellar variability S_ph and the gray scale indicates the pulsation mode amplitude (white-no modes; black-large amp.).