[OI] λ6300 line luminosity of the LVC as a function of L_acc of σ-Orionis sources in both data sets (MIKE and X-shooter). Top: a positive correlation is found with a r=0.79 (pink line). Correlations found in other low-mass SFRs are also shown for comparison (McGinnis et al. 2018; Fang et al. 2018, 2023; Nisini et al. 2018; Rigliaco et al. 2013). The distribution of stellar masses is indicated by the color gradient. Bottom: correlations for the highly irradiated disks within 0.8 pc from σ-Ori (blue), and for the less irradiated disks located further out (red).