Aromatic emission from the ionised mane of the Horsehead nebula M. Compiègne, A. Abergel, L. Verstraete, W. T. Reach, E. Habart, J. D. Smith, F. Boulanger and C. Joblin A&A, 471 1 (2007) 205-212 Published online: 06 June 2007 DOI: 10.1051/0004-6361:20066172