Chemically tracing the water snowline in protoplanetary disks with HCO+ M. Leemker, M. L. R. van ’t Hoff, L. Trapman, M. L. van Gelder, M. R. Hogerheijde, D. Ruíz-Rodríguez and E. F. van Dishoeck A&A, 646 (2021) A3 Published online: 02 February 2021 DOI: 10.1051/0004-6361/202039387