Two-dimensional distributions of (left) the density ρ and (right) temperature T in the R−z plane. In the left panel, streamlines of infalling material are overlaid for ﹩\cos {\theta }_{0}﹩ ranging from 0.1 to 0.9 in steps of 0.1, with values increasing from bottom to top, assuming a centrifugal radius of R_cr = 300 au. The hatched region indicates the infall zone of the fiducial models in this study.