Molecules with ALMA at Planet-forming Scales (MAPS). VI. Distribution of the Small Organics HCN, C<sub>2</sub>H, and H<sub>2</sub>CO

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dc.contributor.authorGuzman, Viviana V.
dc.contributor.authorBergner, Jennifer B.
dc.contributor.authorLaw, Charles J.
dc.contributor.authorOberg, Karin I.
dc.contributor.authorWalsh, Catherine
dc.contributor.authorCataldi, Gianni
dc.contributor.authorAikawa, Yuri
dc.contributor.authorBergin, Edwin A.
dc.contributor.authorCzekala, Ian
dc.contributor.authorHuang, Jane
dc.contributor.authorAndrews, Sean M.
dc.contributor.authorLoomis, Ryan A.
dc.contributor.authorZhang, Ke
dc.contributor.authorLe Gal, Romane
dc.contributor.authorAlarcon, Felipe
dc.contributor.authorIlee, John D.
dc.contributor.authorTeague, Richard
dc.contributor.authorCleeves, L. Ilsedore
dc.contributor.authorWilner, David J.
dc.contributor.authorLong, Feng
dc.contributor.authorSchwarz, Kamber R.
dc.contributor.authorBosman, Arthur D.
dc.contributor.authorPerez, Laura M.
dc.contributor.authorMenard, Francois
dc.contributor.authorLiu, Yao
dc.date.accessioned2025-01-20T22:05:27Z
dc.date.available2025-01-20T22:05:27Z
dc.date.issued2021
dc.description.abstractSmall organic molecules, such as C2H, HCN, and H2CO, are tracers of the C, N, and O budget in protoplanetary disks. We present high-angular-resolution (10-50 au) observations of C2H, HCN, and H2CO lines in five protoplanetary disks from the Molecules with ALMA at Planet-forming Scales (MAPS) ALMA Large Program. We derive column density and excitation temperature profiles for HCN and C2H, and find that the HCN emission arises in a temperate (20-30 K) layer in the disk, while C2H is present in relatively warmer (20-60 K) layers. In the case of HD 163296, we find a decrease in column density for HCN and C2H inside one of the dust gaps near similar to 83 au, where a planet has been proposed to be located. We derive H2CO column density profiles assuming temperatures between 20 and 50 K, and find slightly higher column densities in the colder disks around T Tauri stars than around Herbig Ae stars. The H2CO column densities rise near the location of the CO snowline and/or millimeter dust edge, suggesting an efficient release of H2CO ices in the outer disk. Finally, we find that the inner 50 au of these disks are rich in organic species, with abundances relative to water that are similar to cometary values. Comets could therefore deliver water and key organics to future planets in these disks, similar to what might have happened here on Earth. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4365/ac1440
dc.identifier.eissn1538-4365
dc.identifier.issn0067-0049
dc.identifier.urihttps://doi.org/10.3847/1538-4365/ac1440
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94146
dc.identifier.wosidWOS:000714208200001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal supplement series
dc.rightsacceso restringido
dc.titleMolecules with ALMA at Planet-forming Scales (MAPS). VI. Distribution of the Small Organics HCN, C<sub>2</sub>H, and H<sub>2</sub>CO
dc.typeartículo
dc.volumen257
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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