Detection of CH+ emission from the disc around HD 100546 W.-F. Thi, F. Ménard, G. Meeus, C. Martin-Zaïdi, P. Woitke, E. Tatulli, M. Benisty, I. Kamp, I. Pascucci, C. Pinte et al. (6 more) A&A, 530 (2011) L2 Published online: 28 April 2011 DOI: 10.1051/0004-6361/201116678