Age, metallicity, and IMF slope trends across the Hydra I cluster center as retrieved with ALF. West is on the left, and east is on the right. The bottom panel shows the derived mismatch parameter α _r . Dashed–dotted horizontal tan lines in the IMF and α _r panels outline the corresponding values for a Salpeter IMF, while dashed lines indicate those for a Kroupa IMF. Open diamonds refer to regions where the results are less robust, due to lower S/N, velocity dispersion broadening, and/or lack of important features.