Dense gas and star formation in the outer Milky Way J. Braine, Y. Sun, Y. Shimajiri, F. F. S. van der Tak, M. Fang, Ph. André, H. Chen and Y. Gao A&A, 676 (2023) A27 Published online: 01 August 2023 DOI: 10.1051/0004-6361/202039923