Velocity dispersion in the LOS at galactocentric distances of ∼35 (top) and 12.2 (bottom) kpc along the major axis for MW/M31 like galaxies in the TNG50 (blue) and Auriga (orange) simulations. Black vertical lines are our velocity dispersion measurements for NGC 4945 at those distances, corrected for its systemic velocity. Green and pink dotted vertical lines show the halo velocity dispersion of the MW (Bland-Hawthorn & Gerhard 2016) and M31 (Zhang et al. 2024). Our measurements of NGC 4945 are in agreement with both sets of cosmological simulations.