J/MNRAS/472/2517ivo://CDS.VizieR/J/MNRAS/472/2517doi:10.26093/cds/vizier.74722517CDSJofre P.Traven G.Hawkins K.Gilmore G.Sanders J.L.Madler T.,Steinmetz M.Kunder A.Kordopatis G.McMillan P.Bienayme O.,Bland-Hawthorn J.Gibson B.K.Grebel E.K.Munari U.Navarro J.,Parker Q.Reid W.Seabroke G.Zwitter T.2024-08-17T20:20:50Z2020-08-11T10:09:40ZCDS support team

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

cds-question@unistra.frglobular-star-clustersmultiple-starsvisible-astronomytrigonometric-parallaxWe apply the twin method to determine parallaxes to 232 545 stars of the RAVE survey using the parallaxes of Gaia DR1 as a reference. To search for twins in this large data set, we apply the t-student stochastic neighbour embedding projection that distributes the data according to their spectral morphology on a two-dimensional map. From this map, we choose the twin candidates for which we calculate a {chi}^2^ to select the best sets of twins. Our results show a competitive performance when compared to other model-dependent methods relying on stellar parameters and isochrones. The power of the method is shown by finding that the accuracy of our results is not significantly affected if the stars are normal or peculiar since the method is model free. We find twins for 60 per cent of the RAVE sample that are not contained in Tycho-Gaia Astrometric Solution (TGAS) or that have TGAS uncertainties that are larger than 20 per cent. We could determine parallaxes with typical errors of 28 per cent. We provide a complementary data set for the RAVE stars not covered by TGAS, or that have TGAS uncertainties which are larger than 20 per cent, with model-free parallaxes scaled to the Gaia measurements.2017MNRAS.472.2517Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/472/2517CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)III/279 : RAVE 5th data release (Kunder+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/472/2517https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/472/2517http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/472/2517https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/472/2517https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/472/2517http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/472/2517GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/472/2517/tablea1 (Parallaxes obtained for individual members in each cluster analysed in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/472/2517/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/472/2517/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/472/2517/tablea1?GETtext/xml+votable180.050000true0.8575417-29.00063890.0055555555555555566/460-461 463 472-474 4296 4298 4687 4697-4699 4720-4721 4724 16445 16483 16491 16576-16577 21522-21523 21531 23525 23527 23537 23539 23546 39347 39350 39353 39356 42274https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/472/2517?format=asciiOpticaldefaultJ/MNRAS/472/2517/tablea1Parallaxes obtained for individual members in each cluster analysed in this workSimbadNameSimbad column added by the CDSmeta.idcharClusterCluster namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAVERAVE star namemeta.id;meta.maincharplxtwinMean twin parallaxmaspos.parallax.trigdoubles_plxtwinStandard deviation of plxtwinmasstat.stdevdoubleNtwinNumber of twin candidatesmeta.numberint_RAPosition from RAVE (right ascension part)degpos.eq.ra;meta.main_DEPosition from RAVE (declination part)degpos.eq.dec;meta.main