SMC red giants CaII triplet metallicities

We find a median metallicity of [Fe/H]=-1.05_/-0.01dex with a negative metallicity gradient of -0.064+/-0.007dex/deg between 1.2{deg} and 6.0{deg} consistent with an outside-in evolution scenario. For the first time, we detect hints of a positive metallicity gradient within 1.2{deg}, likely reflecting radial migration or centralized chemical enrichment.

Azimuthal metallicity asymmetries are detected, with flatter gradients in the eastern and southern quadrants and steeper ones in the north and west. They are consistent with tidal interaction effects from the Large Magellanic Cloud. Finally, in spite of a clear distance and velocity bifurcations in the east, they seem to share a common chemical origin, in agreement with other studies.