Figure 6 from Probing CO and N2 Snow Surfaces in Protoplanetary Disks with N2H+ Emission

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Probing CO and N₂ Snow Surfaces in Protoplanetary Disks with N₂H⁺ Emission

Authors: Chunhua Qi, Karin I. Öberg, Catherine C. Espaillat, Connor E. Robinson, Sean M. Andrews, David J. Wilner, Geoffrey A. Blake, Edwin A. Bergin, and L. Ilsedore Cleeves

2019 The Astrophysical Journal 882 160.

Provider: AAS Journals

Caption: Figure 6.

Schematic of the column density “jump and drop” model used to derived CO and N₂ snowline locations for disks with a thick VIRaM layer. R1 and R2 correspond to the CO and N₂ midplane snowline locations, respectively, J1 is the N₂H⁺ enhancement following CO freeze-out in the midplane, and D2 is the N₂H⁺ drop exterior to the N₂ snowline, where N₂H⁺ only exists in a thin, elevated disk layer.

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