Histograms showing the distribution of rotational velocity v_rot(r_eff) (left) and velocity dispersion σ₀ (right) for different galaxy samples including the RC100 (Nestor Shachar et al. 2023), and those from Übler et al. (2019), Wuyts et al. (2016), Wisnioski et al. (2019), and Price et al. (2016). The legend indicates the corresponding dataset and includes the number of galaxies in each sample (in parentheses). The “All” sample (blue) represents the full dataset; the other colors correspond to specific subsamples from various studies.