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GG Tauri : the fifth element

hal.structure.identifierAMOR 2014
dc.contributor.authorDI FOLCO, E.
hal.structure.identifierAMOR 2014
dc.contributor.authorDUTREY, Anne
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorBOUQUIN, J. -B. Le
hal.structure.identifierTechnologies pour la sécurité et les performances des agroéquipements [UR TSAN]
dc.contributor.authorLACOUR, S.
hal.structure.identifierEuropean Southern Observatory [ESO]
dc.contributor.authorBERGER, J. -P.
dc.contributor.authorKÖHLER, R.
hal.structure.identifierAMOR 2014
dc.contributor.authorGUILLOTEAU, S.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorPIÉTU, V.
dc.contributor.authorBARY, J.
dc.contributor.authorBECK, T.
dc.contributor.authorBEUST, H.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorPANTIN, E.
dc.date.created2014-04-08
dc.date.issued2014
dc.identifier.issn0004-6361
dc.description.abstractEnWe aim at unveiling the observational imprint of physical mechanisms that govern planetary formation in young, multiple systems. In particular, we investigate the impact of tidal truncation on the inner circumstellar disks. We observed the emblematic system GG Tau at high-angular resolution: a hierarchical quadruple system composed of low-mass T Tauri binary stars surrounded by a well-studied, massive circumbinary disk in Keplerian rotation. We used the near-IR 4-telescope combiner PIONIER on the VLTI and sparse-aperture-masking techniques on VLT/NaCo to probe this proto-planetary system at sub-AU scales. We report the discovery of a significant closure-phase signal in H and Ks bands that can be reproduced with an additional low-mass companion orbiting GG Tau Ab, at a (projected) separation rho = 31.7 +/- 0.2mas (4.4 au) and PA = 219.6 +/- 0.3deg. This finding offers a simple explanation for several key questions in this system, including the missing-stellar-mass problem and the asymmetry of continuum emission from the inner dust disks observed at millimeter wavelengths. Composed of now five co-eval stars with 0.02 <= Mstar <= 0.7 Msun, the quintuple system GG Tau has become an ideal test case to constrain stellar evolution models at young ages (few 10^6yr).
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enGG Tauri : the fifth element
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201423675
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv1404.2205
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.L2
bordeaux.volume565
bordeaux.peerReviewedoui
hal.identifierhal-00976559
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00976559v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&amp;rft.date=2014&amp;rft.volume=565&amp;rft.spage=id.L2&amp;rft.epage=id.L2&amp;rft.eissn=0004-6361&amp;rft.issn=0004-6361&amp;rft.au=DI%20FOLCO,%20E.&amp;DUTREY,%20Anne&amp;BOUQUIN,%20J.%20-B.%20Le&amp;LACOUR,%20S.&amp;BERGER,%20J.%20-P.&amp;rft.genre=article


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