JWST-MIRI Spectroscopy of Warm Molecular Emission and Variability in the AS 209 Disk

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dc.contributor.authorMunoz-Romero, Carlos E.
dc.contributor.authorOberg, Karin I.
dc.contributor.authorBanzatti, Andrea
dc.contributor.authorPontoppidan, Klaus M.
dc.contributor.authorAndrews, Sean M.
dc.contributor.authorWilner, David J.
dc.contributor.authorBergin, Edwin A.
dc.contributor.authorCzekala, Ian
dc.contributor.authorLaw, Charles J.
dc.contributor.authorSalyk, Colette
dc.contributor.authorTeague, Richard
dc.contributor.authorQi, Chunhua
dc.contributor.authorBergner, Jennifer B.
dc.contributor.authorHuang, Jane
dc.contributor.authorWalsh, Catherine
dc.contributor.authorGuzman, Viviana V.
dc.contributor.authorCleeves, L. Ilsedore
dc.contributor.authorAikawa, Yuri
dc.contributor.authorBae, Jaehan
dc.contributor.authorBooth, Alice S.
dc.contributor.authorCataldi, Gianni
dc.contributor.authorIlee, John D.
dc.contributor.authorLe Gal, Romane
dc.contributor.authorLong, Feng
dc.contributor.authorLoomis, Ryan A.
dc.contributor.authorMenard, Francois
dc.contributor.authorLiu, Yao
dc.date.accessioned2025-01-20T17:07:54Z
dc.date.available2025-01-20T17:07:54Z
dc.date.issued2024
dc.description.abstractWe present MIRI Medium-resolution Spectrograph observations of the large, multi-gapped protoplanetary disk around the T Tauri star AS 209. The observations reveal hundreds of water vapor lines from 4.9-25.5 mu m toward the inner similar to 1 au in the disk, including the first detection of rovibrational water emission in this disk. The spectrum is dominated by hot (similar to 800 K) water vapor and OH gas, with only marginal detections of CO2, HCN, and a possible colder water vapor component. Using slab models with a detailed treatment of opacities and line overlap, we retrieve the column density, emitting area, and excitation temperature of water vapor and OH, and provide upper limits for the observable mass of other molecules. Compared to MIRI spectra of other T Tauri disks, the inner disk of AS 209 does not appear to be atypically depleted in CO2 nor HCN. Based on Spitzer Infrared Spectrograph observations, we further find evidence for molecular emission variability over a 10 yr baseline. Water, OH, and CO2 line luminosities have decreased by factors of 2-4 in the new MIRI epoch, yet there are minimal continuum emission variations. The origin of this variability is yet to be understood.
dc.description.funderSimons Foundation (SF)https://doi.org/10.13039/100000893
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad20e9
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad20e9
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90907
dc.identifier.wosidWOS:001184140900001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleJWST-MIRI Spectroscopy of Warm Molecular Emission and Variability in the AS 209 Disk
dc.typeartículo
dc.volumen964
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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