SNe Ia from double detonations: Impact of core-shell mixing on the carbon ignition mechanism Sabrina Gronow, Christine Collins, Sebastian T. Ohlmann, Rüdiger Pakmor, Markus Kromer, Ivo R. Seitenzahl, Stuart A. Sim and Friedrich K. Röpke A&A, 635 (2020) A169 Published online: 31 March 2020 DOI: 10.1051/0004-6361/201936494