Kinematic properties of some of the TNG50 galaxies. The panels show the flux map, the SB profile Σ_SFR, the velocity field, the rotation curve and the SFR-weighted profiles, respectively. The 1D profiles are determined along the pseudo-long slits represented by the gray straight lines (black solid lines), along with the 95% confidence intervals. The vertical dotted lines represent 2 × R_e. The 1D red solid lines represent the true profile determined directly from the TNG50 data. In the last column, the horizontal blue lines show the total modeled angular momentum j_3D, while the horizontal red lines show the total using the Eq. (3) formula. This approximation can lead to an over-estimation of the total angular momentum by 10–30% depending on the steepness of the v(r) profile.