Pressure. Minkowski curves for the gas pressure or P-field (in units of Boltzmann constant, noted k), analogous to Figure 4. Stellar feedback is the first cause of geometrical and topological change of the P-field set by gravitational and hydrodynamical interactions, in particular at high redshift (z ≳ 2). At low redshift (z ≲ 1.5), it is AGN winds and AGN jets that have a dominant impact on the morphology of the P-field; see Sect. 3.3.