Impacted candidate HMSC AS1. Panel a: large-scale 20 cm continuum overlaid with the Hi-GAL PPMAP contours starting from 10²² cm⁻² with a step of 10²² cm⁻². The red bar indicates the pixels used to create intensity profile. Panel b: closer view of the black box in panel a, overlaid with 7 m +12 m combined 1.3 mm emission contours (white) starting from 3 rms with a step of 1 rms. The 20 cm continuum is indicated by red contours starting from 3 rms with a step of 1 rms. The black dashed circle indicates the field of view (20% power point) of the 1.3 mm image. The white bar indicates the pixels used for ALMA intensity profile. The yellow star, cross, and triangle are similar to those in Figs. 3 and 4, but for the PPMAP . Yellow circles and white ellipse indicate the PPMAP and cm continuum beams, respectively. Panel c: normalized PPMAP and the 7 m + 12 m combined 1.3 mm intensity profiles cut along the direction indicated in panels a and b. The gray region highlights the ALMA imaging field. Panel d: normalized profiles of with different T_dust derived by PPMAP. The numbers after T_dust values in the legend are the S/N of the corresponding profiles. The S/N is set to be zero when < 0.01. Panel e: 20 cm emission profile. The H II region, interface, and plateau are indicated by different labels.