Uncovering the structure and kinematics of the ionized core of M 2-9 with ALMA C. Sánchez Contreras, D. Tafoya, J. P. Fonfría, J. Alcolea, A. Castro-Carrizo and V. Bujarrabal A&A, 692 (2024) A151 Published online: 10 December 2024 DOI: 10.1051/0004-6361/202451669