Strong Hα emission and signs of accretion in a circumbinary planetary mass companion from MUSE Simon C. Eriksson, Rubén Asensio Torres, Markus Janson, Yuhiko Aoyama, Gabriel-Dominique Marleau, Mickael Bonnefoy and Simon Petrus A&A, 638 (2020) L6 Published online: 12 June 2020 DOI: 10.1051/0004-6361/202038131