Difference between the symbolic fits for the baryonic effect on the power spectrum (S_pred) to the true values (S) from the test set. Each column is for a different baryonic model, and each row is for a different redshift, z. The solid lines indicate the mean difference and the shaded region contains 68% of samples. In the dashed orange lines we show the symbolic fits to the error on our models, as given in Table 4. This error is due to a combination of stochasticity in the simulation and imperfect symbolic approximations. The dashed red line in the baryonification model shows the approximate 1% intrinsic error of the BACCO emulator.

Table 4.

Chosen model for the error on baryonic correction to the power spectrum as a function of wavenumber k and redshift z.