Comparison of the 1D relation ρ(P) in a 1.977127 M_⊙ star without rotation (grey curve) and the pairs (ρ, P) from a 2 M_⊙ star obtained by ESTER using a differential rotation profile, the equatorial speed of which is Ω_eq = 0.8Ω_K (blue dots). The brackets indicate that the relation ρ(P) shown here for the 1D model also corresponds to the relation in the model deformed by RUBIS using the uniform rotation speed Ω = 0.8Ω_K (the mass of the model then reaches 2 M_⊙).