High-resolution spectroscopy of the young open cluster M 39 (NGC 7092) J. Alonso-Santiago, A. Frasca, G. Catanzaro, A. Bragaglia, L. Magrini, A. Vallenari, E. Carretta and S. Lucatello A&A, 683 (2024) A75 Published online: 08 March 2024 DOI: 10.1051/0004-6361/202348483