Global view of eigenmodes visibility of Altair’s concordance model. Upper part: proxy of visibility (see Eq. (4)) as a function of frequency for all modes computed with the TOP code using Altair’s concordance model of Bouchaud et al. (2020). The symbols show the individual values for each mode. Pluses (dots) designate modes that are symmetric (anti-symmetric) with respect to the equator. Colours indicate the azimuthal symmetry (see the legend), and p1+, p1−, p2+, p2− indicate prograde modes (i.e. negative m’s). The solid blue line is the envelope of the symbols using bins of 0.1 c/d. It highlights modes with high visibilities. Lower part: scaled amplitude (arbitrary unit) of observed frequencies (red bars). The thin vertical solid lines show possible identification of some 0⁺ modes. Thin vertical dot-dashed lines show the same for three 0⁻ modes. Part of the frequencies have been annotated to ease location.