Discovery of HC3O+ in space: The chemistry of O-bearing species in TMC-1 J. Cernicharo, N. Marcelino, M. Agúndez, Y. Endo, C. Cabezas, C. Bermúdez, B. Tercero and P. de Vicente A&A, 642 (2020) L17 Published online: 23 October 2020 DOI: 10.1051/0004-6361/202039351