Emission of c-C₃H₂ and HC₃N. Channel maps consist of velocity ranges of 1 km s⁻¹ and moment 0 maps are integrated over a velocity range of 8 km s⁻¹. The contours start at 3σ and follow a step of 3σ and 2σ for c-C₃ H₂ and HC₃N, respectively. The yellow stars show the position of the sources and the solid segment represents the extent of the circumbinary disc. The synthesised beam is represented by a black filled ellipse in the right panels.