Model of the accelerations of the NewHorizon simulation. Upper (lower) panel: discrepancy between the reported radial (vertical) acceleration and its fit as a function of the acceleration itself. The colour-bars indicate the percentage of stellar particles enclosed in each region. Dashed (dotted) lines represent relative errors of ±5% (±10%). All the accelerations are expressed in units of a_⊙ ≈ 6895.6 km² s⁻² kpc⁻¹.