Real part (first column), imaginary part (second column) of the frequency, and inverse real part of the polarization (third column) as a function of the wavenumber for Aflvénic waves propagating at 30°, 40°, 50°, 60°, 70°, 80°, and 88v with respect to the background magnetic field, for oxygen ion concentrations of η_O⁺ = 0.00 (first row), η_O⁺ = 0.05 (second row), η_O⁺ = 0.10 (third row), and η_O⁺ = 0.20 (fourth row). For all curves, the plasma beta parameter is β_e = 0.1.