Spatial distribution of 7 HC₃N* lines of hot cores in IRAS 16348-4654 (top row) and IRAS 18056-1952 (bottom row). The background image of each panel from left to right is the moment-0 map of the (a) v₇ = 1, E_u = 349.77530 K, (b) v₇ = 2, E_u = 670.68918 & 673.96249 & 673.96308 K, (c) v₆ = 1, E_u = 746.53960 K, E_u = 1065.29153 & 1066.4191 K, (d) v₅ = 1 E_u = 983.03920 K, (e) v₇ = 3, E_u = 990.39731 K, (f) v₆ = v₇ = 1, and (g) v₄ = 1, E_u = 1274.35207 K emission. The white contours represent the intensity of the continuum emission, with contour levels ranging from 10% to 90% of the peak values in steps of 20%. The corresponding beam sizes are shown in the bottom left corner, and the linear scales are shown in the bottom right corner of the first image of each panel.