Hα emission – weighted projection of the line-of-sight velocity for the inner 80 kpc of our simulated box at t = 3.2 Gyr. A zoom-in on the innermost region showcases the effect of atmospheric seeing on the map. The background image is a projection of the temperature field. The figure can be compared to Fig. 2 from Li et al. (2020). ⊙ and ⊗ markers indicate the directions pointing toward (away) from the viewer, associated with negative (positive) line-of-sight velocity (respectively). More detail on the emissivity weighting are provided in Sect. 4.1. A movie showing the three dimensional structure of the cold phase is available online.