J/MNRAS/520/6245ivo://CDS.VizieR/J/MNRAS/520/6245doi:10.26093/cds/vizier.75206245CDSGalli P.A.B.Miret-Roig N.Bouy H.Olivares J.Barrado D.2024-08-22T20:17:00Z2023-03-04T10:09:16ZCDS support team

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

cds-question@unistra.fropen-star-clustersradial-velocityproper-motionsvisible-astronomytrigonometric-parallaxThe Tucana-Horologium association is one of the closest young stellar groups to the Sun and despite the close proximity its age is still debated in the literature. We take advantage of the state-of-the-art astrometry delivered by the third data release of the Gaia space mission combined with precise radial velocity measurements obtained from high-resolution spectroscopy to investigate the dynamical age of the association. We perform an extensive traceback analysis using a combination of different samples of cluster members, metrics to evaluate the minimum size of the association in the past and models for the galactic potential to integrate the stellar orbits back in time. The dynamical age of 38.5^+1.6^_-8.0_Myr that we derive in this paper is consistent with the various age estimates obtained from isochrone fitting in the literature (30-50Myr) and reconciles, for the first time, the dynamical age of the Tucana-Horologium association with the age obtained from lithium depletion (~40Myr). Our results are independent from stellar models and represent one more step towards constructing a self-consistent age scale for the young stellar groups of the Solar neighbourhood based on the 3D space motion of the stars.2023MNRAS.520.6245Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/6245CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/520/6245https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/520/6245http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/520/6245https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/520/6245https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/520/6245http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/520/6245GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/520/6245/tablea2 (Properties of Tuc-Hor stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/6245/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/6245/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/6245/tablea2?GETtext/xml+votable180.050000true1.46951961-41.75340810.005555555555555556Cone search capability for table J/MNRAS/520/6245/tablea1 (Radial velocities derived in this paper)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/6245/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/6245/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/6245/tablea1?GETtext/xml+votable180.050000true1.46951961-41.75340810.0055555555555555566/46 16424 16486 16547 20650 23176 32792 32805 32844 32881 32891 32950 33042 33052 33116 33312 33334 33361 33500 33583 33667 33694 33707 33848 33856 33940 33981 33996 34051 34058 34179 34338 34346 34406 34418 34436 34450 34464 34509 34607 34739 34757 34781 34789 34825 34830 34886 34896 34930 35077 35497 35509 35531 35627 35640 35706 35861 36308 36346 36487 36803 36869 36907 37027 38920 40961 40965 45072 45104 45195 45306 45336 45382 45538 45544 45657 45694 45797 45927 46536 47376https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/520/6245?format=asciiOpticaldefaultJ/MNRAS/520/6245/tablea2Properties of Tuc-Hor starsplxParallaxmaspos.parallax.trigfloat_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaia3Display the Gaia DR3 data (Cat. I/355)meta.ref.urlcharGaiaDR3Source identifier from Gaia-DR3 cataloguemeta.id;meta.mainprimaryRVsindicates individual radial velocities in table A1meta.ref.urlcharRA_ICRSRight ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.rafloate_pmRAProper motion uncertainty in right ascensionmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmDEProper motion uncertainty in declinationmas/yrstat.error;pos.pm;pos.eq.decfloate_plxParallax uncertaintymasstat.error;pos.parallaxfloatRV1? Radial velocity (Gaia-DR3)km/sspect.dopplerVelocfloatnullablee_RV1? Radial velocity uncertainty (Gaia-DR3)km/sstat.errorfloatnullableRV2? Radial velocity (this work)km/sspect.dopplerVelocfloatnullablee_RV2? Radial velocity uncertainty (this work)km/sstat.errorfloatnullableFlag1[01] Binary flag (0=single; 1=binary) (G1)meta.code.errorcharFlag2[01] Sample flag (0=rejected; 1=accepted) (G2)meta.code.errorcharFlag3[01] Control sample 1 (0=rejected; 1=accepted) (G2)meta.code.errorcharFlag4[01] Control sample 2 (0=rejected; 1=accepted) (G2)meta.code.errorcharJ/MNRAS/520/6245/tablea1Radial velocities derived in this paperrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Source identifier from Gaia-DR3 cataloguemeta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainMJDModified Julian datedtime.epochfloatRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVRadial velocity uncertaintykm/sstat.errorfloats_RVRadial velocity scatterkm/sstat.error;spect.dopplerVelocfloatSNRSignal-to-noise of the spectrumstat.snrintPIDProgramme identifiermeta.id;obscharInstInstrumentmeta.id;instrcharFlag[01] Binary flag (0=single; 1=binary) (G1)meta.code.errorchar