Location of the AGBb in the plane log T_eff; log ν_max, in the mass bin, M ∈ [0.6, 0.9] M_⊙, and metallicity bins, [Fe/H] ∈ [ − 1.0, −0.5], [ − 0.5, −0.25], [ − 0.25, 0.0] dex. The metallicity bin [Fe/H] ∈ [0.0, 0.25] dex is missing because we do not have enough stars to perform a statistically sound study. Observations are marked by blue dots, while the dark blue and light blue ellipses correspond to the 1σ and 2σ regions, respectively. The reference model presented is shown by a light blue square. Other models are shown with different symbols listed in the labels; they have been obtained by individually changing the parameters of the reference model. The changes are indicated in the label of each panel. The black dot with errorbars indicates the mean uncertainty we have for all models. The uncertainty on the AGBb location in log ν_max and log T_eff for each model is taken as the standard deviation of the Gaussian function that reproduces the overdensity caused by the AGBb in the 1D histograms. The numerical values are listed in Table A.1. Ranges of the axes vary in the different panels.