Using HCO${}^{+}$ isotopologues as tracers of gas depletion in protoplanetary disk gaps

Grigorii V. Smirnov-Pinchukov, Dmitry A. Semenov, Vitaly V. Akimkin +1

The widespread rings and gaps seen in the dust continuum in protoplanetary disks are sometimes accompanied by similar substructures seen in molecular line emission. One example is…