Brightness distributions of λ 3 mm rotational transitions of the polyyne-like radicals C₂H, C₄H, and C₆H, and the cyanopolyyne-like species CN, HC₃N, HC₅N, and C₃N, averaged over a velocity range of width 3 km s^-1 centered at V_LSR = V_sys. Details on the maps can be found in Sect. 2. The maps are centered on the star, indicated by a cross, and the synthesized beam (~1′′ in all maps but that of C₆H, where it is ~3′′) is shown in the bottom left corner of each panel. A white circle of radius 15′′ centered on the star is drawn to facilitate comparison among maps.