Predicted rotation profile of HD 192575 with ESTER (red solid line) and MESA (black lines). The profiles indicated by a solid line and dotted line are for a constant viscosity of 10⁷ cm² s⁻¹, while the dashed line is for 10⁹ cm² s⁻¹. The dots correspond to the location of the core boundary. The red and grey shaded areas indicate the measured core (top one) and surface (bottom one) rotation frequencies by Burssens et al. (2023), assuming r_shear equal to the outer boundary of the μ-gradient zone, and r_shear = R_⋆, respectively.