Moving average [M/H] profile of GC late-type stars. Top panel: profile along Galactic longitude, centred on Sgr A^★. Red lines denote the average over the entire FOV. Blue dashed lines are for stars at b<1 pc, that is, without stars located in the northern region of the FOV (shown as orange dot-dashed line), and the black dot-dashed line excludes stars with H − K_S <1.7 mag. The average was computed with 200 stars; uncertainties are Poisson errors. The green line denotes the moving average of [M/H] of 100 stars from Feldmeier-Krause et al. (2017a, 2020). Vertical dashed lines denote the NSC R_e =5 pc, and the centre at 0 pc. Middle panel: same as the top panel but including NSD data from Fritz et al. (2021), shown as purple dashed and solid orange lines with diamond symbols, and Feldmeier-Krause (2022), shown together with the Feldmeier-Krause et al. (2017a, 2020) data as green square symbols. To aid visibility, we plot error bars only every ∼20 pc. Bottom panel: profile along the observed H − K_S for different regions in our FOV and averaged over 50–100 stars to account for the lower and different number of stars per field.