Chemistry in Externally FUV-irradiated Disks in the Outskirts of the Orion Nebula Cluster

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dc.contributor.authorDiaz-Berrios, Javiera K.
dc.contributor.authorGuzman, Viviana V.
dc.contributor.authorWalsh, Catherine
dc.contributor.authorOberg, Karin I.
dc.contributor.authorCleeves, L. Ilsedore
dc.contributor.authorde la Villarmois, Elizabeth Artur
dc.contributor.authorCarpenter, John
dc.date.accessioned2025-01-20T16:13:09Z
dc.date.available2025-01-20T16:13:09Z
dc.date.issued2024
dc.description.abstractMost stars are born in stellar clusters, and their protoplanetary disks, which are the birthplaces of planets, can, therefore, be affected by the radiation of nearby massive stars. However, little is known about the chemistry of externally irradiated disks, including whether or not their properties are similar to the so-far better-studied isolated disks. Motivated by this question, we present ALMA Band 6 observations of two irradiated Class II protoplanetary disks in the outskirts of the Orion Nebula Cluster to explore the chemical composition of disks exposed to (external) far-ultraviolet (FUV) radiation fields: the 216-0939 disk and the binary system 253-1536A/B, which are exposed to radiation fields of 102-103 times the average interstellar radiation field. We detect lines from CO isotopologues, HCN, H2CO, and C2H toward both protoplanetary disks. Based on the observed disk-integrated line fluxes and flux ratios, we do not find significant differences between isolated and irradiated disks. The observed differences seem to be more closely related to the different stellar masses than to the external radiation field. This suggests that these disks are far enough away from the massive Trapezium stars, that their chemistry is no longer affected by external FUV radiation. Additional observations toward lower-mass disks and disks closer to the massive Trapezium stars are required to elucidate the level of external radiation required to make an impact on the chemistry of planet formation in different kinds of disks.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad4603
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad4603
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90376
dc.identifier.wosidWOS:001268499300001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleChemistry in Externally FUV-irradiated Disks in the Outskirts of the Orion Nebula Cluster
dc.typeartículo
dc.volumen969
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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