The halo of M 49 and its environment as traced by planetary nebulae populations J. Hartke, M. Arnaboldi, A. Longobardi, O. Gerhard, K. C. Freeman, S. Okamura and F. Nakata A&A, 603 (2017) A104 Published online: 18 July 2017 DOI: 10.1051/0004-6361/201730463