J/A+A/628/A68ivo://CDS.VizieR/J/A+A/628/A68doi:10.26093/cds/vizier.36280068CDSGarufi A.Podio L.Bacciotti F.Antoniucci S.Boccaletti A.,Codella C.Dougados C.Menard F.Mesa D.Meyer M.Nisini B.,Schmid H.M.Stolker T.Baudino J.L.Biller B.Bonavita M.Bonnefoy M.,Cantalloube F.Chauvin G.Cheetham A.Desidera S.D'Orazi V.Feldt M.,Galicher R.Grandjean A.Gratton R.Hagelberg J.Lagrange A.M.,Langlois M.Lannier J.Lazzoni C.Maire A.L.Perrot C.Rickman E.,Schmidt T.A.ViganZurlo A.Delboulbe A.Le Mignant D.Fantinel D.,Moeller-Nilsson O.Weber L.Sauvage J.-F.2019-10-23T11:29:31Z2019-10-18T07:25:27ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsmillimeter-astronomyphotometrysubmillimeter-astronomyJets are rarely associated with pre-main-sequence intermediate-mass stars. This contrasts with the frequent detection of jets in lower-mass or younger stars. Optical and near-IR observations of jet-driving sources are often hindered by the presence of a natal envelope. Jets around partly embedded sources are a useful diagnostic to constrain the geometry of the concealed protoplanetary disk. In fact, the jet-driving mechanisms are affected by both spatial anisotropies and episodic variations at the (sub-)au scale from the star. We obtained a rich set of high-contrast VLT/SPHERE observations from 0.6um to 2.2um of the young intermediate-mass star RY Tau. Given the proximity to the Sun of this source, our images have the highest spatial resolution ever obtained for an atomic jet (down to 4au). Optical observations in polarized light show no sign of the protoplanetary disk detected by ALMA. Instead, we observed a diffuse signal resembling a remnant envelope with an outflow cavity. The jet is detected in the H{alpha}, [SII] at 1.03um, HeI at 1.08um, and [FeII] lines in the 1.25um and 1.64um. The jet appears to be wiggling and its radial width increasing with the distance is complementary to the shape of the outflow cavity suggesting a strong jet/envelope interaction. Through the estimated tangential velocity (~100km/s), we revealed a possible connection between the launching time of the jet sub-structures and the stellar activity of RY Tau. RY Tau is at an intermediate stage toward the dispersal of the natal envelope. This source shows episodic increases of mass accretion /ejection similarly to other known intermediate-mass stars. The amount of observed jet wiggle is consistent with the presence of a precessing disk warp or misaligned inner disk that would be induced by an unseen planetary/sub-stellar companion at sub-/few-au scales. The high disk mass of RY Tau and of two other jet-driving intermediate-mass stars, HD163296 and MWC480, suggests that massive, full disks are more efficient at launching prominent jets.2019A&A...628A..68Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/628/A68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/341/553 : RY Tau in 1996 (Petrov+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/628/A68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/628/A68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/628/A68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/628/A68https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/628/A68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/628/A68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/628/A68/list (Informations on fits image)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/628/A68/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/628/A68/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/628/A68/list?GETtext/xml+votable180.050000true65.4892128.443190.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/628/A686/1169https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/628/A68?format=asciiMillimeterdefaultJ/A+A/628/A68/listInformations on fits imagerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar