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Molecules with ALMA at Planet-forming Scales (MAPS). VIII. CO Gap in AS 209—Gas Depletion or Chemical Processing?

Authors: Felipe Alarcón, Arthur D. Bosman, Edwin A. Bergin, Ke Zhang, Richard Teague, Jaehan Bae, Yuri Aikawa, Sean M. Andrews, Alice S. Booth, Jenny K. Calahan, Gianni Cataldi, Ian Czekala, Jane Huang, John D. Ilee, Charles J. Law, Romane Le Gal, Yao Liu, Feng Long, Ryan A. Loomis, François Ménard, Karin I. Öberg, Kamber R. Schwarz, Merel L. R. van 't Hoff, Catherine Walsh, David J. Wilner

Felipe Alarcón et al 2021 The Astrophysical Journal Supplement Series 257 .

Provider: AAS Journals

Caption: Figure 5.

Emitting heights measured in Law et al. (2021b) compared to the layers in the disk where the optical depth ranges from 0.67 to 2 for each line. This layer serves as a probe of the emitting height as most of the contribution of the line should come from these heights. The comparison seems to coincide well with the surfaces of CO and ¹³CO. Models A and B are within the range given by the observations.

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