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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 10.

Normalized line emission of select species. Top: Radial profiles of hydrocarbons and CO. We observe a multiple peak structure within the gas gap. Bottom: Radial profiles of nitriles in AS 209. They peak close to 25 au, one of the inner continuum-emission rings. The black shaded area represents the CO ice line in the midplane.

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