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The JDISC Survey: Linking the Physics and Chemistry of Inner and Outer Protoplanetary Disk Zones

  • Authors: Nicole Arulanantham, Colette Salyk, Klaus Pontoppidan, Andrea Banzatti, Ke Zhang, Karin Öberg, Feng Long, John Carr, Joan Najita, Ilaria Pascucci, María José Colmenares, Chengyan Xie, Jane Huang, Joel Green, Sean M. Andrews, Geoffrey A. Blake, Edwin A. Bergin, Paola Pinilla, Miguel Vioque, Emma Dahl, Eshan Raul, Sebastiaan Krijt

Nicole Arulanantham et al 2025 The Astronomical Journal 170 .

  • Provider: AAS Journals

Caption: Figure 18.

Subset of JDISCS Cycle 1 targets with retrieved C2H2 slab temperatures of ∼1000 K, required to reproduce broader “pedestal”-like emission than observed in the other disks from our sample (magenta; full models from Figure 4 are filled in gray). Optically thick C2H2 components with ﹩\mathrm{log}N=22﹩ cm−2 are overplotted for comparison (cyan; B. Tabone et al. 2023; A. M. Arabhavi et al. 2024), and OH emission lines that were not included in our fits are marked with purple, dashed lines. While the optically thick gas models can reproduce the excess emission near the bandheads, they overpredict the emission from the P and R branch transitions and are therefore not consistent with the overall shapes of the pedestals.

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