Evolution of peak dust temperature found in this work. Left panel: The peak dust temperatures, T_d, as a function of the IR luminosity, L_IR, color-coded with redshift. It can be seen that while T_d increases with L_IR between z = 0.45 − 5.7, it does not seem to significantly vary at any given redshift. Right panel: Since T_d variations with L_IR at any given redshift remain small, we plot the average peak dust temperature as a function of redshift as black points, with the best-fit solid black line. For comparison, we show the relations of Schreiber et al. (2018), Viero et al. (2022) and Ismail et al. (2023) as dotted red, dash-dotted green, and dashed blue lines, respectively. For discussion see Sect. 5.2.