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First detection of H2S in a protoplanetary disk

hal.structure.identifierAMOR 2018
dc.contributor.authorPHUONG, N. T.
hal.structure.identifierAMOR 2018
dc.contributor.authorCHAPILLON, E.
dc.contributor.authorMAJUMDAR, L.
hal.structure.identifierAMOR 2018
dc.contributor.authorDUTREY, Anne
hal.structure.identifierAMOR 2018
dc.contributor.authorGUILLOTEAU, S.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorPIÉTU, V.
hal.structure.identifierAMOR 2018
dc.contributor.authorWAKELAM, Valentine
dc.contributor.authorBECK, T.
dc.contributor.authorDIEP, P.
dc.contributor.authorTANG, Y.-W.
dc.contributor.authorBARY, J.
dc.date.issued2018-08
dc.identifier.issn0004-6361
dc.description.abstractEnContext. Studying molecular species in protoplanetary disks is very useful to characterize the properties of these objects, which are the site of planet formation.Aims. We attempt to constrain the chemistry of S-bearing molecules in the cold parts of circumstellar disk of GG Tau A.Methods. We searched for H2S, CS, SO, and SO2 in the dense disk around GG Tau A with the NOrthem Extended Millimeter Array (NOEMA) interferometer. We analyzed our data using the radiative transfer code DiskFit and the three-phase chemical model Nautilus.Results. We detected H2S emission from the dense and cold ring orbiting around GG Tau A. This is the first detection of H2S in a protoplanetary disk. We also detected HCO+, H13CO+, and DCO+ in the disk. Upper limits for other molecules, CCS, SO2, SO, HC3N, and c-C3H2 are also obtained. The observed DCO+/HCO+ ratio is similar to those in other disks. The observed column densities, derived using our radiative transfer code DiskFit, are then compared with those from our chemical code Nautilus. The column densities are in reasonable agreement for DCO+, CS, CCS, and SO2. For H2S and SO, our predicted vertical integrated column densities are more than a factor of 10 higher than the measured values.Conclusions. Our results reinforce the hypothesis that only a strong sulfur depletion may explain the low observed H2S column density in the disk. The H2S detection in GG Tau A is most likely linked to the much larger mass of this disk compared to that in other T Tauri systems.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enprotoplanetary disks
dc.subject.enmolecular data
dc.subject.enastrochemistry
dc.subject.enstars: individual: GG Tau
dc.title.enFirst detection of H2S in a protoplanetary disk
dc.title.enThe dense GG Tauri A ring
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201833766
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv1808.00652
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageL5
bordeaux.volume616
bordeaux.peerReviewedoui
hal.identifierhal-01868399
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01868399v1
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