Rapid-then-slow migration reproduces mass distribution of TRAPPIST-1 system Masahiro Ogihara, Eiichiro Kokubo, Ryuunosuke Nakano and Takeru K. Suzuki A&A, 658 (2022) A184 Published online: 21 February 2022 DOI: 10.1051/0004-6361/202142354