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Circumbinary Ring, Circumstellar disks and accretion in the binary system UY Aurigae

dc.contributor.authorTANG, Ya-Wen
hal.structure.identifierAMOR 2014
dc.contributor.authorDUTREY, Anne
hal.structure.identifierAMOR 2014
dc.contributor.authorGUILLOTEAU, S.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorPIETU, Vincent
hal.structure.identifierAMOR 2014
dc.contributor.authorDI FOLCO, E.
dc.contributor.authorBECK, Tracy
dc.contributor.authorHO, Paul T. P.
dc.contributor.authorBOEHLER, Yann
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorGUETH, Frederic
dc.contributor.authorBARY, Jeff
dc.contributor.authorSIMON, Michal
dc.date.created2014-07-17
dc.date.issued2014
dc.identifier.issn0004-637X
dc.description.abstractEnRecent exo-planetary surveys reveal that planets can orbit and survive around binary stars. This suggests that some fraction of young binary systems which possess massive circumbinary disks (CB) may be in the midst of planet formation. However, there are very few CB disks detected. We revisit one of the known CB disks, the UY Aurigae system, and probe 13CO 2-1, C18O 2-1, SO 5(6)-4(5) and 12CO 3-2 line emission and the thermal dust continuum. Our new results confirm the existence of the CB disk. In addition, the circumstellar (CS) disks are clearly resolved in dust continuum at 1.4 mm. The spectral indices between the wavelengths of 0.85 mm and 6 cm are found to be surprisingly low, being 1.6 for both CS disks. The deprojected separation of the binary is 1.26" based on our 1.4 mm continuum data. This is 0.07" (10 AU) larger than in earlier studies. Combining the fact of the variation of UY Aur B in $R$ band, we propose that the CS disk of an undetected companion UY Aur Bb obscures UY Aur Ba. A very complex kinematical pattern inside the CB disk is observed due to a mixing of Keplerian rotation of the CB disk, the infall and outflow gas. The streaming gas accreting from the CB ring toward the CS disks and possible outflows are also identified and resolved. The SO emission is found to be at the bases of the streaming shocks. Our results suggest that the UY Aur system is undergoing an active accretion phase from the CB disk to the CS disks. The UY Aur B might also be a binary system, making the UY Aur a triple system.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.title.enCircumbinary Ring, Circumstellar disks and accretion in the binary system UY Aurigae
dc.typeArticle de revue
dc.identifier.doi10.1088/0004-637X/793/1/10
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.identifier.arxiv1407.4561
bordeaux.journalThe Astrophysical Journal
bordeaux.pageid. 10
bordeaux.volume793
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01061627
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01061627v1
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