Line-of-sight velocity distribution for the entire stellar sample, shown on the left. Central panel shows comparison between the uncertainty on the line-of-sight velocity provided by Gaia (blue filled circles) and the one measured with high-resolution spectroscopy (red filled circles) as a function of observed G magnitude. The blue arrows point out the outliers in the distribution, specifically representing target stars with errors in the Gaia velocity measurement larger than 10 km s⁻¹. Right panel shows the difference between the two measurements of the line-of-sight velocity. The red dashed lines mark the ±3σ threshold.