Kernel density estimate of the RV distribution for the stars in Cha I (left panel) and Cha II (right panel). We used the mean precision of the RVs in each sample (see text in Sect. 3.1) as kernel bandwidth. The tick marks in the horizontal axis mark the RVs of individual stars. The star with the most discrepant RV in the Cha I sample, namely Gaia DR2 5201347408553455616 (V_r = 164.11 ± 1.61 km s⁻¹, Sacco et al. 2017), is not shown to improve the visibility of the plot.