Face-on gas density (top) and edge-on temperature (bottom) distributions across the midplane of the protostellar disk formed from the numerical simulations of the collapse of a core. We note that this is the disk we compared to the observations of IRAS 16293-2422 B. The white contour in the bottom panel represents the extension of the soot line at 300 K. This model is presented in greater detail in Zamponi et al. (2021).