Field containing the bright-rimmed cloud BRC12. Top left: composite colour image: red is the Herschel-PACS emission at 100 μm and turquoise is the Spitzer-MIPS emission at 24 μm. Top right: the YSOs discussed in the text and present in Table 2 are identified. The underlying grey-scale image is the Herschel-PACS image at 100 μm. Bottom left: temperature map of the dust: the red contour is 26 K, the green is 24 K, the yellow is 22 K, and the dark blue is 20 K. Bottom right: column density map: the red contour is 4 × 10²¹ cm^-2, the green is 2 × 10²¹ cm^-2, the orange is 1 × 10²¹ cm^-2, and the yellow is 0.5 × 10²¹ cm^-2. The column density is high mostly in the direction of the point sources (it is the column density of their envelopes, smoothed by the beam). Some other condensations appear, which may be prestellar (see Sect. 6.6). North is up and east is left.