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Mapping CO Gas in the GG Tauri A Triple System with 50 AU Spatial Resolution

hal.structure.identifierInstitute of Earth Sciences [Tapei] [IES Sinica]
dc.contributor.authorTANG, Ya-Wen,
hal.structure.identifierAMOR 2016
dc.contributor.authorDUTREY, Anne
hal.structure.identifierAMOR 2016
dc.contributor.authorGUILLOTEAU, S.
hal.structure.identifierAMOR 2016
dc.contributor.authorCHAPILLON, E.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorPIETU, Vincent,
hal.structure.identifierAMOR 2016
dc.contributor.authorDI FOLCO, E.
hal.structure.identifierDepartment of Physics and Astronomy [Hamilton NY]
dc.contributor.authorBARY, Jeff,
hal.structure.identifierGeorg-August-University = Georg-August-Universität Göttingen
dc.contributor.authorBECK, Tracy,
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorBEUST, Herve,
hal.structure.identifierCentro de Radioastronomia y Astrofisica [CRyA]
dc.contributor.authorBOEHLER, Yann,
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorGUETH, Frederic,
hal.structure.identifierECLIPSE 2016
dc.contributor.authorHURÉ, J.-M.
hal.structure.identifierECLIPSE 2016
dc.contributor.authorPIERENS, A.
hal.structure.identifierInstitut Mutualiste de Montsouris [IMM]
dc.contributor.authorSIMON, Michal,
dc.date.issued2016
dc.identifier.issn0004-637X
dc.description.abstractEnWe aim at unveiling the observational imprint of physical mechanisms that govern planetary formation in the young, multiple system GG Tau A. We present ALMA observations of $^{12}$CO and $^{13}$CO 3-2 and continuum at 0.9 mm at 0.35" resolution. The $^{12}$CO gas, found in the cavity of the dust ring where no $^{13}$CO gas is detected, confirms the existence of a CO accretion shock near the circumstellar disk of GG Tau Aa. The outer disk and the hot spot lying at the outer edge of the dust ring are observed both in $^{12}$CO and $^{13}$CO. The gas emission in the outer disk can be radially decomposed in a series of slightly overlapping gaussian rings, suggesting the presence of unresolved gaps. The dip closest to the disk center lies at a radius very close to the CO hot spot location ($\sim250-260$~au). Studies of the CO excitation conditions reveal that the outer disk remains in the shadow of the ring. The hot spot probably results from local heating processes. The two latter points strongly support the hypothesis making the hot spot an embedded proto-planet shepherding the outer disk and accreting surrounding material which may be traced by the the redshifted component observed in the spectra around the hot spot.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.title.enMapping CO Gas in the GG Tauri A Triple System with 50 AU Spatial Resolution
dc.typeArticle de revue
dc.identifier.doi10.3847/0004-637X/820/1/19
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1511.05687
bordeaux.journalThe Astrophysical Journal
bordeaux.pageid. 19
bordeaux.volume820
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01239069
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01239069v1
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