Herschel large-scale map (left) of H₂ column density (Juárez et al. 2019). The large-scale filament, roughly in the southeast–northwest direction, can be clearly seen. The large box shows the region mapped in NH₃, encompassing the area of highest column density of the filament. The embedded sources detected in the IR, millimeter, and centimeter continuum are identified in the enlarged view (right) of the small box in the central area (except RNO 1, which lies outside the small box). The black dots (•) in the right panel correspond to millimeter dust-continuum emission (Juárez et al. 2019), and the plus signs (+) to mid-IR sources (Quanz et al. 2007) and centimeter continuum sources (Anglada et al. 1994).