The origin of close massive binaries in the M17 star-forming region E. Bordier, A. J. Frost, H. Sana, M. Reggiani, A. Mérand, A. Rainot, M. C. Ramírez-Tannus and W. J. de Wit A&A, 663 (2022) A26 Published online: 08 July 2022 DOI: 10.1051/0004-6361/202141849