Magnesium radicals MgC5N and MgC6H in IRC +10216 J. R. Pardo, C. Cabezas, J. P. Fonfría, M. Agúndez, B. Tercero, P. de Vicente, M. Guélin and J. Cernicharo A&A, 652 (2021) L13 Published online: 31 August 2021 DOI: 10.1051/0004-6361/202141671