Results of the linear correlation analysis. For each star we show the significance of the linear correlation between the activity indicator labeled on the x-axis and the respective RV data set. Red colors indicate significant (p < 0.1%) linear correlations, while orange colors represent tentative (0.1% ≤ p < 5%) correlations. The identifiers of the two planet hosts, HIP 75458 and HIP 88048, are marked in red.