Progenitor mass and ejecta asymmetry of supernova 2023ixf from nebular spectroscopy Lucía Ferrari, Gastón Folatelli, Keila Ertini, Hanindyo Kuncarayakti and Jennifer E. Andrews A&A, 687 (2024) L20 Published online: 22 July 2024 DOI: 10.1051/0004-6361/202450440