Astrometric mass measurement of compact companions in binary systems with Gaia Yilun Wang, Shilong Liao, Nicola Giacobbo, Aleksandra Olejak, Jian Gao and Jifeng Liu A&A, 665 (2022) A111 Published online: 19 September 2022 DOI: 10.1051/0004-6361/202243684