CO Line Emission Surfaces and Vertical Structure in Midinclination Protoplanetary Disks

Abstract High spatial resolution CO observations of midinclination (?30°–75°) protoplanetary disks offer an opportunity to study the vertical distribution emission and temperature. The asymmetry line relative disk major axis allows for a direct mapping height above midplane, optically thick, spatially resolved in LTE, intensity is measure local gas Our analysis Atacama Large Millimeter/submillimeter Array archival data yields surfaces, dynamically constrained stellar host masses, atmosphere temperatures around following: HD 142666, MY Lup, V4046 Sgr, 100546, GW WaOph 6, DoAr 25, Sz 91, CI Tau, DM Tau. These sources span wide range masses (0.50–2.10 M ? ), ages (?0.3–23 Myr), radial extents (?200–1000 au). This sample nearly triples number with mapped surfaces confirms diversity emitting heights ( z / r ? 0.1 ?0.5) hinted at previous studies. We compute temperature distributions each disk. A few show dips or enhancements, some which correspond dust substructures proposed locations embedded planets. Several also substructures, all align rings gaps millimeter dust. Combining our literature sources, we find that weakly decline mass temperature, which, despite large scatter, consistent simple scaling relations. observe correlation between size, due flared structure disks. Overall, trace ?2–5× pressure scale (H g ) could potentially be calibrated as empirical tracers H .