Discovery of a new molecular ion, HC7NH+, in TMC-1 C. Cabezas, M. Agúndez, N. Marcelino, B. Tercero, R. Fuentetaja, P. de Vicente and J. Cernicharo A&A, 659 (2022) L8 Published online: 23 March 2022 DOI: 10.1051/0004-6361/202142972