The Hydra I cluster core - I. Stellar populations in the cD galaxy NGC 3311 C. E. Barbosa, M. Arnaboldi, L. Coccato, M. Hilker, C. Mendes de Oliveira and T. Richtler A&A, 589 (2016) A139 Published online: 26 April 2016 DOI: 10.1051/0004-6361/201628137