Gaps, rings, and non-axisymmetric structures in protoplanetary disks: Emission from large grains J. P. Ruge, M. Flock, S. Wolf, N. Dzyurkevich, S. Fromang, Th. Henning, H. Klahr and H. Meheut A&A, 590 (2016) A17 Published online: 28 April 2016 DOI: 10.1051/0004-6361/201526616