Seismic Investigation of the Solar Structure Using Gong Frequencies

ω0 is the frequency of p-mode in the reference model, ω is the observed frequency for the same mode and w = ω/(l + 1/2). The function H1(w) which is related to the sound speed difference between the model and the Sun, provides another measure of the sound speed difference. Similarly, H2(ω) which reflects the differences in the surface layers is better suited to test different formulations of solar convection theory. The sound speed difference between the Sun and model can be found using the relation