J/A+A/666/A61ivo://CDS.VizieR/J/A+A/666/A61doi:10.26093/cds/vizier.36660061CDSKenworthy M.A.Gonzalez Picos D.Elizondo E.Martin R.G.van Dam D.M.,Rodriguez J.E.Kennedy G.M.Ginski C.Mugrauer M.Vogt N.Adam C.,Oelkers R.J.2022-11-25T13:14:20Z2022-10-10T08:54:59ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsccd-photometrymultiple-starsYoung multiple stellar systems can host both circumstellar and circumbinary disks composed of gas and dust, and the orientations of circumbinary disks can be sculpted by the orientation and eccentricity of the central binaries. Studying multiple binary systems and their associated disks enables understanding of the size and distribution of the planetary systems that subsequently form around them. A deep (~70%) and extended (~150 days) eclipse was seen towards the young multiple stellar system V773 Tau in 2010. We interpret it as being due to the passage of a circumbinary disc around the B components moving in front of the A components. Our aim is to characterise the orientation and structure of the disc, to refine the orbits of the sub-components, and to predict when the next eclipse will occur. We combine the photometry from several ground based surveys, construct a model for the light curve of the eclipse, and use high angular resolution imaging to refine the orbits of the three components of the system, A, B and C. Frequency analysis of the light curves, including from the TESS satellite, enables characterisation of the rotational periods of the Aa and Ab stars. A toy model of the circumbinary disk shows that it extends out to approximately 5 au around the B binary and has an inclination of 73 with respect to the orbital plane of AB, where the lower bound of the radius of the disk is constrained by the geometry of the AB orbit and the upper bound is set by the stability of the disk. We identify several frequencies in the photometric data that we attribute to rotational modulation of the Aa and Ab stellar companions. We produce the first determination of the orbit of the more distant C component around the AB system and limit its inclination to 93{deg}. The high inclination and large diameter of the disk, together with the match from theory suggest that B is an almost equal mass, moderately eccentric binary. We identify the rotational periods of the Aa and Ab stars, identify a third frequency in the light curve that we attribute to the orbital period of the stars in the B binary. We predict that the next eclipse will be around 2037, during which both detailed photometric and spectroscopic monitoring will characterise the disk in greater detail.2022A&A...666A..61Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/666/A61CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/666/A61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/666/A61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/666/A61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/666/A61https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/666/A61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/666/A61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/666/A61/list (Information on fits image)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/666/A61/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/666/A61/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/666/A61/list?GETtext/xml+votable180.050000true63.55387528.20344440.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/666/A616/1159https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/666/A61?format=asciidefaultJ/A+A/666/A61/v773tauPhotometry of V773 TaurecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSurveyThe name of the photometry surveymeta.id;photcharTimeEpoch (MJD-50000)dtime.epochdoubleFluxNormalised fluxphot.flux;arith.ratiodoublee_FluxError on normalised fluxstat.error;phot.fluxdoubleEclipse[0/1] Whether the photometry is during the eclipse (1 for true)meta.codeintJ/A+A/666/A61/listInformation on fits imagerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)pos.eq.ra;meta.mainDEJ2000Declination of center sign (J2000)pos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar