Radial gradients of spectral indices of the high-σ_* (orange pentagons) and low-σ_* (blue stars) subsamples. The top row shows the three absorption indices, and the bottom row contains the composite index, which serves as a proxy for total metallicity (﹩{[{\rm{MgFe}}]}^{{\prime} }﹩) and [α/Fe] (Mg_b/〈Fe〉). The x-axis represents the average galactocentric distance in kiloparsecs. The Jupyter notebook for reproducing this figure can be found here: ✎. This repository is also available on Zenodo (https://doi.org/10.5281/zenodo.17979404).