Heat maps of the real part of the normalized frequency ω/Ω_p, negative normalized damping rate −γ/Ω_p, and real polarization P for Alfvénic waves as functions of the propagation angle and wavenumber for the four oxygen ion concentrations considered in this study, each displayed in a different row. The orange-colored curves display contour curves of characteristic values of the damping rate, while the white curves correspond to the contour plot of Re(P) = 0. The beta parameter is set at β_e = 0.01 (left) and β_e = 0.10 (right), assuming isothermy between species.