Gaia DR2 reveals a star formation burst in the disc 2–3 Gyr ago R. Mor, A. C. Robin, F. Figueras, S. Roca-Fàbrega and X. Luri A&A, 624 (2019) L1 Published online: 01 April 2019 DOI: 10.1051/0004-6361/201935105