Metallicity gradient across a radial span of 0.0–1.5 R_e using the T_e (red) and P04 calibration based on O3N2 (black) as a function of stellar mass. The red data points correspond to the slopes depicted in Fig. 9, with error bars indicating the uncertainty in the slope. Each SFR − M_⋆ bin’s slopes are shown with gray points, while green points represent the median value of slopes within a specific mass range. The gray shaded area represents a third-degree polynomial fit to the slopes of all SFR-M bins.