Anomalous peculiar motions of high-mass young stars in the Scutum spiral arm K. Immer, J. Li, L. H. Quiroga-Nuñez, M. J. Reid, B. Zhang, L. Moscadelli and K. L. J. Rygl A&A, 632 (2019) A123 Published online: 16 December 2019 DOI: 10.1051/0004-6361/201834208