Herschel/SPIRE maps, at the same linear scale, of the H₂ column density (top row) and dust temperature (bottom row) in L183 (left column) and L1544 (right column). The beam of SPIRE is shown as a white (top row) and black (bottom row) circle in the bottom-left corner. The white star in the middle of L183 figures represents our pointing, while the one in L1544 identifies the dust peak of the source. White contours are 0.5, 1.5, 2.5 × 10²² cm⁻² for the H₂ column density (top row) maps and 12, 14, 16, 18 K for the dust temperature (bottom row) maps, respectively.