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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 9.

C2H column-density profiles compared with the inferred values from observations. Top: simulation set for Model A. Bottom: simulation set for Model B. The shaded areas in yellow and blue are the dust gaps and dust ring, respectively. Variable C/O models are shown in continuous lines, while the dashed lines are the models with a constant C/O ratio equal to 1. Our simulations show that depleting the number of small dust grains increases the C2H column density by a factor of a few. However the main player in the C2H column density is the C/O ratio.

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