J/AJ/149/119ivo://CDS.VizieR/J/AJ/149/119doi:10.26093/cds/vizier.51490119CDSTobin J.J.Hartmann L.Furesz G.Hsu W.-H.Mateo M.2017-11-29T11:48:12Z2015-04-24T12:39:57ZCDS support team

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

cds-question@unistra.fropen-star-clustersradial-velocitystellar-spectral-typesinfrared-photometryWe present an expanded kinematic study of the young cluster NGC 2264 based upon optical radial velocities measured using multi-fiber echelle spectroscopy at the 6.5m MMT and Magellan telescopes. We report radial velocities for 695 stars, of which approximately 407 stars are confirmed or very likely members. Our results more than double the number of members with radial velocities from Furesz et al., resulting in a much better defined kinematic relationship between the stellar population and the associated molecular gas. In particular, we find that there is a significant subset of stars that are systematically blueshifted with respect to the molecular (^13^CO) gas. The detection of Lithium absorption and/or infrared excesses in this blueshifted population suggests that at least some of these stars are cluster members; we suggest some speculative scenarios to explain their kinematics. Our results also more clearly define the redshifted population of stars in the northern end of the cluster; we suggest that the stellar and gas kinematics of this region are the result of a bubble driven by the wind from O7 star S Mon. Our results emphasize the complexity of the spatial and kinematic structure of NGC 2264, important for eventually building up a comprehensive picture of cluster formation.2015AJ....149..119Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/119CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/138/1116 : A Spitzer view of NGC 2264 (Sung+, 2009)J/AJ/138/963 : Rotation of NGC 2264 members (Baxter+, 2009)J/AJ/135/441 : VRIHa photometry in NGC 2264 (Sung+, 2008)J/ApJ/676/1109 : Velocities of stars in Orion Nebula Cluster (Furesz+, 2008)J/ApJ/648/1090 : Radial velocities of NGC 2264 stars (Furesz+, 2006)J/AJ/127/2659 : CHANDRA observations of NGC 2264 (Ramirez+, 2004)J/AJ/123/1528 : UBV(RI)c and JHK photometry in NGC 2264 (Rebull+, 2002)J/AJ/114/2644 : UBVRIHa photometry of NGC2264 (Sung+, 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/119https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/149/119http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/119https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/149/119https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/149/119http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/149/119GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/149/119/table3 (Velocity summary)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/149/119/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/149/119/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/149/119/table3?GETtext/xml+votable180.050000true99.7656259.67316670.0055555555555555566/23636 23637 23639https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/149/119?format=asciiOpticalInfrareddefaultJ/AJ/149/119/table3Velocity summarySimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASSInternal source name (HHMMSSs+DDMMSS, J2000)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.main<HRV>[-108/235] Mean Heliocentric Radial Velocity (1)km/sspect.dopplerVeloc;stat.meanfloate_<HRV>Uncertainty in HRVkm/sstat.errorfloatNobs[2/14] Number of observations (epochs) (2)meta.numberintEW? Lithium 6707{AA} Equivalent Width0.1nmspect.line.eqWidthfloatnullableSpT[61/77.2]? Numerical spectral type (3)src.spTypefloatnullableK-3.6[-23/22]? The Ks-[3.6] color index (4)magphot.color;em.IR.K;em.IR.3-4umfloatnullable3.6-4.5[-22/22]? The [3.6]-[4.5] color index (4)magphot.color;em.IR.3-4um;em.IR.4-8umfloatnullableF06Source from Furesz et al. 2006 (cat. J/ApJ/648/1090) within 1.5''meta.ref.urlintnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar