PSPs for the 6.0 + 2.4 M_⊙ merger product (black) and the 7.8 M_⊙ genuine HG star (blue) without rotation at the time of comparison (violet box in Fig. 1). The dashed grey lines connect pure g modes with the same radial order n_g. The dashed black and grey lines with cross symbols indicate p-g mixed modes. These p-g mixed modes have at least one node in the radial direction, that is, n_p > 0. Panel (a) and (b) show the PSPs for (ℓ, m) = (1,  0) and (2,  0) modes, respectively. The green and purple horizontal lines indicate the Π_ℓ values for the merger product and genuine single star, respectively.