The spatial extent of polycyclic aromatic hydrocarbons emission in the Herbig star HD 179218A. S. Taha, L. Labadie, E. Pantin, A. Matter, C. Alvarez, P. Esquej, R. Grellmann, R. Rebolo, C. Telesco and S. WolfA&A, 612 (2018) A15DOI: https://doi.org/10.1051/0004-6361/201732008