Annular substructures in the transition disks around LkCa 15 and J1610 S. Facchini, M. Benisty, J. Bae, R. Loomis, L. Perez, M. Ansdell, S. Mayama, P. Pinilla, R. Teague, A. Isella and A. Mann A&A, 639 (2020) A121 Published online: 20 July 2020 DOI: 10.1051/0004-6361/202038027