Binary stars radial distribution. Binary fraction with q ≥ q_lim normalized to the total binary fraction, as a function radial distance from the cluster center in core radius units. The azure lines mark the median trends, while the shaded areas correspond to the 1σ dispersion. Panels a–c include clusters in the three different dynamical age intervals defined in the main text (see Sect. 3.2), while panel d refers to all clusters. Color coding and age bins are the same as in Fig. 6.