Observational study of hydrocarbons in the bright photodissociation region of Messier 8 M. Tiwari, K. M. Menten, F. Wyrowski, J. P. Pérez-Beaupuits, M.-Y. Lee and W.-J. Kim A&A, 626 (2019) A28 Published online: 06 June 2019 DOI: 10.1051/0004-6361/201834567