[Ba/Fe] abundances as a function of [Fe/H] as predicted by our adopted stochastic chemical evolution model with a reduced fraction of systems originating NSM (top panel) and rotational velocity distribution for massive stars favouring higher velocities (bottom panel). The colormap displays the number of predicted long-lived stars by the model on a logarithmic scale. As a comparison, we plot in grayscale the result by the stochastic chemical evolution model using our fiducial setup. Black symbols are as in Fig. 12.