ALMA dust thermal continuum emission map at 278 GHz towards 08477−4359c1. The first contour level and the step is 8.7 × 10⁻⁴ Jy beam⁻¹, corresponding to the 3σ rms noise level (1σ ~ 2.9 × 10⁻⁴ Jy beam⁻¹). The white polygons indicate the fragments identified on the basis of the criteria described in Sect. 4. In each panel, the circle indicates the ALMA field of view at 278 GHz (~24′′), and the cross the phase centre, corresponding to the coordinates in Table 1.