J/MNRAS/400/518ivo://CDS.VizieR/J/MNRAS/400/518doi:10.26093/cds/vizier.74000518CDSMelnik A.M.Dambis A.K.2024-07-10T20:16:40Z2010-01-10T21:43:11ZCDS support team

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

cds-question@unistra.fropen-star-clustersstellar-associationsradial-velocityproper-motionsThe proper motions of OB-associations computed using the old (1997, Cat. <I/239>) and new (2008, Cat. <I/311>) reductions of the Hipparcos data are in a good agreement with each other. The Galactic rotation curve derived from the analysis of line-of-sight velocities and proper motions of OB-associations is almost flat in the 3-kpc neighborhood of the Sun. The angular rotation velocity at the solar distance is Omega_0_=31(+/-1)km/s/kpc. The standard deviation of the velocities of OB-associations from the rotation curve is sigma=7.2km/s. The distance scale for OB associations by Blaha and Humpreys (1989AJ.....98.1598B) should be shortened by 10-20%. The residual velocities of OB-associations calculated for the new and old reductions differ, on average, by 3.5km/s. The mean residual velocities of OB-associations in the stellar-gas complexes depend slightly on the data reduction employed.2009MNRAS.400..518Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/400/518CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)J/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)J/PAZh/21/13 : New list of OB associations (Melnik+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/400/518https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/400/518http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/400/518https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/400/518https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/400/518http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/400/518GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/400/518/table1 (Kinematic parameters for 91 OB-associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/400/518/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/400/518/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/400/518/table1?GETtext/xml+votable180.050000true267.5825-29.55630.0055555555555555566/1287 1297 1542 2940 3059 3062 3138 3257 3280 3307 3331 3632 3712 3721 3755 12990 13535 13960 14264 14280 14301 14311 14358 14630 14644 14647 14655 14692 15384 15396 15622 15651 15683 21518 21644 22038 22243 22851 23644 23994 24332 28803 28807 28828 28916 29089 29095 29162 29456 29461 29513 29532 30245 31756 37333 37900-37901 37923 37926 38016 38018 39207 39237 39386 39742 39779 39798 39804 39868 39913 39930 41662 41677 41699 41738 41756 41813 41856 42153 42169 42203 42224 42394 42458 42483 42516 42987https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/400/518?format=asciiOpticaldefaultJ/MNRAS/400/518/table1Kinematic parameters for 91 OB-associationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNames of OB-associations from BH list, Blaha & Humpreys, 1989AJ.....98.1598Bmeta.id;meta.maincharGLonMean galactic longitude of the associationdegpos.galactic.lonGLatMean galactic latitude of the associationdegpos.galactic.latrMean heliocentric distance of the associationkpcmeta.id.assoc;pos.distance;stat.meanfloatRV? Median line-of-sight velocitykm/sspect.dopplerVeloc;stat.medianfloatnullabledRV? Dispersion of line-of-sight velocitieskm/sphys.veloc.dispersionfloatnullableo_RVNumber of stars with known line-of-sight velocitymeta.numberintpmGLon1? Median proper motion along l-direction, old reductionmas/yrpos.pmfloatnullabledpmGLon1? Dispersion of pmGLon1mas/yrphys.veloc.dispersionfloatnullablepmGLat1? Median proper motion along b-direction, old reductionmas/yrpos.pmfloatnullabledpmGLat1? Dispersion of pmGLat1mas/yrphys.veloc.dispersionfloatnullablepmGLon2? Median proper motion along l-direction, new reductionmas/yrpos.pmfloatnullabledpmGLon2? Dispersion of pmGLon2mas/yrphys.veloc.dispersionfloatnullablepmGLat2? Median proper motion along b-direction, new reductionmas/yrpos.pmfloatnullabledpmGLat2? Dispersion of pmGLat2mas/yrphys.veloc.dispersionfloatnullableo_pmNumber of stars with known proper motionsmeta.numberintNtNumber of stars with known photometrymeta.numberint_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into account (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into account (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedSimbadNameSimbad column added by the CDSmeta.idchar