J/ApJ/938/100ivo://CDS.VizieR/J/ApJ/938/100doi:10.26093/cds/vizier.19380100CDSHao C.J.Xu Y.Bian S.B.Hou L.G.Lin Z.H.Li Y.J.Liu D.J.2025-02-12T20:09:15Z2024-10-11T16:29:25ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomytrigonometric-parallaxproper-motionsradial-velocitytwo-color-diagramsphotometryAlthough a large number of Galactic open clusters (OCs) have been identified, the internal kinematic properties (e.g., rotation) of almost all the known OCs are still far from clear. With the high-precision astrometric data of Gaia EDR3, we have developed a methodology to unveil the rotational properties of the Praesepe cluster. Statistics of the three-dimensional residual motions of the member stars reveal the presence of Praesepe's rotation and determine its spatial rotation axis. The mean rotation velocity of the Praesepe cluster within its tidal radius is estimated to be 0.2+/-0.05km/s, and the corresponding rotation axis is tilted in relation to the Galactic plane with an angle of 41{deg}+/-12{deg}. We also analyzed the rms rotational velocity of the member stars around the rotation axis, and found that the rotation of the member stars within the tidal radius of Praesepe probably follows Newton's classical theorems.2022ApJ...938..100Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/938/100CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2015)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/AJ/80/379 : Hyades cluster: motion, membership & dist (Hanson+, 1975)J/A+A/331/81 : Hyades membership (Perryman+ 1998)J/AJ/124/1570 : JHKs photometry in Praesepe (Adams+, 2002)J/AJ/134/2340 : Membership of Praesepe & Coma Ber clusters (Kraus+, 2007)J/MNRAS/399/2146 : Orbits of open clusters in the Galaxy (Wu+, 2009)J/MNRAS/413/2218 : Stellar rotation in Hyades and Praesepe (Delorme+, 2011)J/MNRAS/434/3236 : Masses of Praesepe members (Khalaj+, 2013)J/A+A/558/A53 : MW global survey of star clusters. II. (Kharchenko+, 2013)J/ApJ/769/107 : RVs and [Fe/H] of star members of NGC 6388 (Lanzoni+, 2013)J/ApJ/784/57 : Photometry and proper motions in Praesepe (Wang+, 2014)J/A+A/618/A93 : Gaia DR2 open clusters in the MW (Cantat-Gaudin+, 2018)J/A+A/616/A10 : Open clusters GaiaDR2 HR diagrams (Gaia Collaboration, 2018)J/A+A/628/A66 : alpha Persei, Pleiades and Praesepe clusters (Lodieu+, 2019)J/ApJ/885/131 : High-mass SFR plx & proper motion with VLBI (Reid+, 2019)J/A+A/627/A4 : Praesepe (NGC 2632) and its tidal tails (Roeser+, 2019)J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)J/A+A/635/A45 : Open clusters in the Galactic disc (Castro-Ginard+, 2020)J/A+A/652/A102 : 3794 open clusters parameters (Hao+, 2021)J/ApJ/923/23 : Stellar spins in the Pleiades, Praesepe & M35 (Healy+, 2021)J/A+A/651/A104 : Spiral arms Gaia EDR3 (Poggio+, 2021)J/A+A/653/A160 : Updated radial velocities from Gaia DR2 (Seabroke+, 2021)J/A+A/661/A118 : Open clusters found with OCfinder (Castro-Ginard+, 2022)J/A+A/660/A4 : Gaia EDR3 new Galactic open clusters (Hao+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/938/100https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/938/100http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/938/100https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/938/100https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/938/100http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/938/100GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/938/100/table3 (Astrometric parameters and errors of selected member stars with 3D kinematic measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/938/100/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/938/100/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/938/100/table3?GETtext/xml+votable180.050000true131.0709438918.736556110.0055555555555555565/1171 1174 1177 1180 6/4282 4298 4335 4620 4639 4678-4679 4689-4691 4700 4702 4705 4712 4716 4725-4730 4732 4761 4805 4902 49041.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/938/100?format=asciiOpticaldefaultJ/ApJ/938/100/table3Astrometric parameters and errors of selected member stars with 3D kinematic measurementsRA_ICRS[119.6/133] Right Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRS[11.4/24.8] Declination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainGLON[200.9/216.2] Galactic longitudedegpos.galactic.lonGLAT[23.1/36.1] Galactic latitudedegpos.galactic.latdoubleplx[4.62/6.02] Parallaxmaspos.parallax.trigdoublee_plx[0.014/0.4] Error of parallaxmasstat.error;pos.parallaxdoublepmRA[-40.9/-31] Proper motion in RA, pmRA*cosDEmas/yrpos.pm;pos.eq.radoublee_pmRA[0.013/0.4] Error of pmRAmas/yrstat.error;pos.pm;pos.eq.radoublepmDE[-15.8/-10.2] Proper motion in declinationmas/yrpos.pm;pos.eq.decdoublee_pmDE[0.01/0.3] Error of pmDEmas/yrstat.error;pos.pm;pos.eq.decdoubleGmag[6.15/13.6] Gaia EDR3 G-band mean magnitudemagphot.mag;em.optdoubleBp-Rp[0.4/1.7] Gaia EDR3 (Bp-Rp) color indexmagphot.color;em.opt.B;em.opt.RdoubleRVel[30.6/40.1] Spectroscopic radial velocity in the solar barycentric reference framekm/sphys.veloc;pos.barycenterdoublee_RVel[0.14/2] Error of RVelkm/sstat.error;phys.veloc;pos.barycenterdoubleSimbadSimbad column added by the CDSmeta.ref.urlchar_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.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia EDR3 source_idmeta.id;meta.main