Discovery of the cyclic C5H radical in TMC-1 C. Cabezas, M. Agúndez, R. Fuentetaja, Y. Endo, N. Marcelino, B. Tercero, J. R. Pardo, P. de Vicente and J. Cernicharo A&A, 663 (2022) L2 Published online: 01 July 2022 DOI: 10.1051/0004-6361/202244063