J/ApJ/859/33ivo://CDS.VizieR/J/ApJ/859/33doi:10.26093/cds/vizier.18590033CDSGalli P.A.B.Loinard L.Ortiz-Leon G.N.Kounkel M.Dzib S.A.,Mioduszewski A.J.Rodriguez L.F.Hartmann L.Teixeira R.Torres R.M.,Rivera J.L.Boden A.F.Evans II N.J.Briceno C.Tobin J.J.Heyer M.2020-02-14T07:44:33Z2019-07-10T13:50:05ZCDS support team

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

cds-question@unistra.frstar-forming-regionsradio-sourcesproper-motionsvisible-astronomytrigonometric-parallaxstellar-distanceyoung-stellar-objectsmolecular-cloudsWe present new trigonometric parallaxes and proper motions of young stellar objects in the Taurus molecular cloud complex from observations collected with the Very Long Baseline Array as part of the Gould's Belt Distances Survey. We detected 26 young stellar objects and derived trigonometric parallaxes for 18 stars with an accuracy of 0.3% to a few percent. We modeled the orbits of six binaries and determined the dynamical masses of the individual components in four of these systems (V1023 Tau, T Tau S, V807 Tau, and V1000 Tau). Our results are consistent with the first trigonometric parallaxes delivered by the Gaia satellite and reveal the existence of significant depth effects. We find that the central portion of the dark cloud Lynds 1495 is located at d=129.5+/-0.3pc, while the B216 clump in the filamentary structure connected to it is at d=158.1+/-1.2pc. The closest and remotest stars in our sample are located at d=126.6+/-1.7pc and d=162.7+/-0.8pc, yielding a distance difference of about 36pc. We also provide a new distance estimate for HL Tau that was recently imaged. Finally, we compute the spatial velocity of the stars with published radial velocity and investigate the kinematic properties of the various clouds and gas structures in this region.2018ApJ...859...33Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/859/33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)VII/7 : Lynds' Catalogue of Dark Nebulae (LDN) (Lynds 1962)VII/244 : Atlas and Catalog of Dark Clouds (Dobashi+, 2005)J/ApJ/578/914 : Low-mass stars in Taurus (Hartmann, 2002)J/AN/328/889 : Mean Radial Velocities of open clusters (Kharchenko+, 2007)J/ApJS/186/259 : Taurus Spitzer survey: new candidate members (Rebull+, 2010)J/ApJ/724/835 : The Spitzer c2d survey of WTTSs. III. (Wahhaj+, 2010)J/ApJ/723/1542 : Optical high-resolution spectroscopy of WTTSs (Xing, 2010)J/ApJ/751/115 : Millimeter emission from Taurus bin. systems (Harris+, 2012)J/ApJ/745/119 : Close companions to young stars I. ChaI & Tau (Nguyen+, 2012)J/ApJ/801/91 : Gould's Belt Very Large Array survey IV. Taurus (Dzib+, 2015)J/MNRAS/472/675 : Wide binaries in Tycho-Gaia: search method (Andrews+, 2017)J/A+A/599/A14 : Taurus ultra-wide pairs (Joncour+, 2017)J/ApJ/834/142 : GOBELINS. II. OMC (Kounkel+, 2017)J/ApJ/838/150 : The Taurus-Auriga ecosystem. I. (Kraus+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/859/33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/859/33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/859/33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/859/33https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/859/33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/859/33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/859/33/table2 (VLBA detections and nondetections in Taurus)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/859/33/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/859/33/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/859/33/table2?GETtext/xml+votable180.050000true63.363458328.27344440.005555555555555556Cone search capability for table J/ApJ/859/33/table5 (Proper motions, parallaxes, and distances derived from VLBA observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/859/33/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/859/33/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/859/33/table5?GETtext/xml+votable180.050000true63.363427528.2735150.005555555555555556Cone search capability for table J/ApJ/859/33/table4 (VLBA measured positions for the sources in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/859/33/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/859/33/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/859/33/table4?GETtext/xml+votable180.050000true63.36346204687528.27341124891670.005555555555555556Cone search capability for table J/ApJ/859/33/table1 (Observed fields in Taurus with the VLBA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/859/33/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/859/33/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/859/33/table1?GETtext/xml+votable180.050000true65.509166719.55750.0055555555555555566/342 1030 1031 1048 1050 1051 1052 1053 1068 1073 1075 1078 1080 1082 1114 1159 1168 1169 1170 1176 23549 242523.313034785154005e-24 5.5658981862942334e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/859/33?format=asciiOpticalRadiodefaultJ/ApJ/859/33/table2VLBA detections and nondetections in TaurusrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGBS-VLAGBS-VLA identifier (JHHMMSS.ss+DDMMSS.s) (1)meta.id;meta.maincharONameOther identifiermeta.idcharl_F5GHzminLimit flag on F5GHzminmeta.code.errorcharF5GHzmin[0.05/11.2]? Minimum flux at 5.0GHzmJyphot.flux.density;em.radio.3-6GHzfloatnullablee_F5GHzmin[0.04/0.09]? F5GHzmin uncertaintymJystat.errorfloatnullableF5GHzmax[0.1/12]? Maximum flux at 5.0GHzmJyphot.flux.density;em.radio.3-6GHzfloatnullablee_F5GHzmax[0.04/0.07]? F5GHzmax uncertaintymJystat.errorfloatnullablel_F8.4GhzminLimit flag on F8.4GHzminmeta.code.errorcharF8.4Ghzmin[0.09/20.4]? Minimum flux at 8.4GHzmJyphot.flux.density;em.radio.6-12GHzfloatnullablee_F8.4Ghzmin[0.05/0.4]? F8.4Ghzmin uncertaintymJystat.errorfloatnullableF8.4Ghzmax[0.1/69]? Maximum flux at 8.4GHzmJyphot.flux.density;em.radio.6-12GHzfloatnullablee_F8.4Ghzmax[0.06/0.7]? F8.4Ghzmax uncertaintymJystat.errorfloatnullablelogTB[6.1/9.1]? log of brightness temperaturephys.temperaturefloatnullableTypeType of source (2)src.classcharNd[0/14] Number of detectionsmeta.numberintNo[3/14] Number of observationsmeta.numberintSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from GBS-VLA names (right ascension part)degpos.eq.ra;meta.main_DEPositions from GBS-VLA names (declination part)degpos.eq.dec;meta.mainJ/ApJ/859/33/table5Proper motions, parallaxes, and distances derived from VLBA observationsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNobsNumber of NRAO archive observations for this source (link to Table 3)meta.numberintnullableNameSource identifiermeta.id;meta.maincharprimarypmRA[-52.8/11.3] Proper motion along RA, {mu}_{alpha}_cos{delta}mas/yrpos.pm;pos.eq.rafloate_pmRA[0.01/2.2] pmRA uncertaintymas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-28.8/-11.1] Proper motion along DEC, {mu}_{delta}_mas/yrpos.pm;pos.eq.decfloate_pmDE[0.01/2.2] pmDE uncertaintymas/yrstat.error;pos.pm;pos.eq.decfloatalphaRA? Acceleration {alpha}_{alpha}_cos{delta}mas.yr**-2phys.accelerationfloatnullablee_alphaRA? alphaRA uncertaintymas.yr**-2stat.errorfloatnullablealphaDE? Acceleration {alpha}_{delta}_mas.yr**-2phys.accelerationfloatnullablee_alphaDE? alphaDE uncertaintymas.yr**-2stat.errorfloatnullablePlx[6.1/11.9] Trigonometric parallaxmaspos.parallax.trigfloate_Plx[0.02/1.4] Plx uncertaintymasstat.error;pos.parallaxfloatDist[84/163] Distancepcpos.distance;pos.heliocentricfloate_Dist[0.5/18.2] Negative error on Distpcstat.errorfloatE_Dist[0.5/25.5] Positive error on Distpcstat.error;stat.maxfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/859/33/table4VLBA measured positions for the sources in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource identifiermeta.idcharCodeNRAO project codemeta.id;obscharJD[2452906.9/2458041] Julian Day of the observationdtime.epoch;obsdoubleRAJ2000[4] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[18/30] Degree of Declination (J2000)pos.eq.dec;meta.maine_RAJ2000[8e-8/2.1e-5] Uncertainty in RAssstat.error;pos.eq.radoublee_DEJ2000[2e-6/0.0005] Uncertainty in DEsarcsecstat.error;pos.eq.decdoubleJ/ApJ/859/33/table1Observed fields in Taurus with the VLBArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCodeNRAO project codemeta.id;obscharDateObservation date (UT)time.epoch;obsnullableBandObserved band (X=8.4GHz, 216 occurrences or C=5.0GHz, 91 occurrences)instr.bandpasscharRAJ2000[4/4] Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000[18/30] Degree of Declination (J2000) (1)pos.eq.dec;meta.mainCalibCalibrators (2)meta.idcharJ/ApJ/859/33/table3VLBA data in Taurus from the NRAO archiverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCodeNRAO project codemeta.id;obscharDateObservation date (UT)time.epoch;obsnullableNameSource identifiermeta.id;meta.maincharCalibCalibrators (1)meta.idchar