Internal rotation profiles from our forward-modelling approach using various models: panel a) constant rotation; b) two-zone model with fixed zone boundary; c) three-zone model with fixed boundary; d) two zone model with variable zone boundary; e) Gaussian profile centered at the surface; f) error function profile. Red and blue lines indicate rotation profiles resulting from mode kernels of the best-fit models M1 and M2, respectively. The uncertainties (black dashed lines) are only plotted for M1-based profiles for better visibility but are similar for the M2-based profiles. The insets show the observed (grey symbols) and best-fit (red symbols) rotational splittings as a function of the mode frequency with the axes in d-1.
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