Left panel: spectrum of 16 Cyg A in the region of the (l, n)=(2, 20) multiplet. Black shows the observations and red is the theoretical model corresponding to the MAP estimates of the parameters θ (cf. Eq. (4)). The vertical red ticks mark the position of the non-degenerate frequencies with −l ≤ m ≤ l. Right panel: splitting diagram for the multiplet. The contributions of the terms in Eq. (3) are represented individually. The final red horizontal ticks correspond to those in the left panel.