SF2A-2021: Semaine de l'Astrophysique Francaise Siebert, A. ; Baillié, K. ; Lagadec, E. ; Lagarde, N. ; Malzac, J. ; Marquette, J. -B. ; N'Diaye, M. ; Richard, J. ; Venot, O. Abstract Publication: SF2A-2021: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Pub Date: December 2021 Bibcode: 2021sf2a.conf.....S