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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 4.

CO column-density profiles for both sets of simulations. Top: smooth gas surface density applying the CO depletion profile in Figure 2. Bottom: Simulation set with CO as a gas mass tracer. The vertical shaded areas are the location of dust substructures, while the radial shaded regions represent the CO column densities derived in Zhang et al. (2021) using ¹³CO and C¹⁸O emission. In both cases, Models A and B, we observe that whether including CO chemical processing or the gas depletion, they both match the recovered CO column densities. The shaded regions are the locations of the dust gaps and dust rings, in yellow and blue, respectively.

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