FIFI-LS contour maps of the [O I] lines at 63.2 and 145.5 μm, the [CII] line at 157.7 μm, and the CO 14-13 line at 186 μm (white contours) on top of the continuum emission at 4.5 μm from Spitzer/IRAC. The contours show line emission at 25%, 50%, 75%, and 95% of the corresponding line emission peak. The “+” and “×” signs show the positions of the dense cores A and B, respectively. The orange squares show the positions of two YSO candidates with envelopes, and the yellow circles show the positions of the remaining YSOs (Sect. 4.5).