Fig. 2: Normal modes model.
From: Juno spacecraft gravity measurements provide evidence for normal modes of Jupiter

Radial velocity profile (a) and corresponding amplitude of normalized spherical harmonic coefficients (b). The model is depicted for \({{{{\mathcalligra{v}}}}}_{{{{{{{\rm{max}}}}}}}}\) = 50 cm/s, zero \({{{{\mathcalligra{v}}}}}_{{{{{{{\rm{min}}}}}}}}\), \({f}_{{{{{{{{\rm{peak}}}}}}}}}\) = 1210 μHz, and σf = 300 μHz. The letters f and the numbers indicate, respectively, f-modes and the radial order of p-modes, up to n = 7.