Hubble diagram of the SN Ia sample used by Davis et al. (2007). Overplotted are the theoretical curves, corresponding to the distance moduli: μ(z) for wΩ_M = 0.16 (green solid line); (also for wΩ_M = 0.16) with being given by Eq. (72) (orange solid line); and with being given by Eq. (73) (dashed line). We observe that, after the thermodynamical content of a collisional-DM fluid is taken into account, the theoretical curve representing the distance modulus, μ(z) (Eq. (55)), fits the entire dataset quite accurately (green line).