J/AJ/147/138ivo://CDS.VizieR/J/AJ/147/138doi:10.26093/cds/vizier.51470138CDSCarlberg J.K.2017-06-13T11:09:12Z2014-10-01T08:21:47ZCDS support team

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

cds-question@unistra.fropen-star-clustersgiant-starsradial-velocityThis study presents the rotational distribution of red giant (RG) stars in 11 old to intermediate age open clusters. The masses of these stars are all above the Kraft break, so they lose negligible amounts of their birth angular momentum (AM) during the main-sequence (MS) evolution. However, they do span a mass range with quite different AM distributions imparted during formation, with the stars less massive than ~1.6M_{sun}_ arriving on the MS with lower rotation rates than the more massive stars. The majority of RGs in this study are slow rotators across the entire red giant branch regardless of mass, supporting the picture that intermediate-mass stars rapidly spin down when they evolve off the MS and develop convection zones capable of driving a magnetic dynamo. Nevertheless, a small fraction of RGs in open clusters show some level of enhanced rotation, and faster rotators are as common in these clusters as in the field RG population. Most of these enhanced rotators appear to be red clump stars, which is also true of the underlying stellar sample, while others are clearly RGs that are above or below the clump. In addition to rotational velocities, the radial velocities (RVs) and membership probabilities of individual stars are also presented. Cluster heliocentric RVs for NGC 6005 and Pismis 18 are reported for the first time.2014AJ....147..138Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/147/138CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/322 : UCAC4 Catalogue (Zacharias+, 2012)J/MNRAS/430/221 : NGC 2849 and NGC 6134 UBVI photometry (Ahumada+, 2013)J/AJ/145/134 : Velocities of 108 stars in Ruprecht 147 (Curtis+, 2013)J/A+A/545/A139 : Radial Velocities of stars observed in M67 (Pasquini+, 2012)J/ApJ/757/109 : Velocities + Li abundance in K giants (Carlberg+, 2012)J/ApJ/732/39 : Rotational velocities of K giant stars (Carlberg+, 2011)J/AJ/139/2034 : NGC 6253 stars equivalent widths (Anthony-Twarog+, 2010)J/A+A/511/A56 : Abundances of five open clusters (Pancino+, 2010)J/A+A/505/1129 : BVRIJHK and proper motions in NGC 6253 (Montalto+, 2009)J/A+A/480/79 : Giants abundances in 5 Galactic clusters (Bragaglia+, 2008)J/A+A/488/943 : Abundances of giants in 4 Galactic clusters (Sestito+, 2008)J/A+A/485/303 : RVs for 1309 stars and 166 OCl (Mermilliod+, 2008)J/AJ/135/209 : Velocities 761 HIP giants (Massarotti+, 2008)J/A+A/475/1003 : Stellar parameters of G and K giant stars (Hekker+, 2007)J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)J/A+A/423/189 : UBV and RV of red giants in NGC 2477 (Eigenbrod+, 2004)J/MNRAS/309/739 : NGC 2660 UBVIc photometry (Sandrelli+, 1999)J/AJ/115/1076 : UBRVI photometry of Collinder 110 (Dawson+, 1998)J/A+AS/113/299 : Abundances and velocities for cluster giants (Minniti 1995)J/AJ/106/181 : CCD photometry of open cluster M67 (Montgomery+ 1993)http://www.univie.ac.at/webda/ : WEBDA databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/147/138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/147/138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/147/138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/147/138https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/147/138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/147/138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/147/138/clusters (Studied open clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/147/138/clusters?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/147/138/clusters?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/147/138/clusters?GETtext/xml+votable180.050000true99.645832.040.005555555555555556Cone search capability for table J/AJ/147/138/stars (Properties and velocities of the observed red giant candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/147/138/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/147/138/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/147/138/stars?GETtext/xml+votable180.050000true99.66504172.09708610.0055555555555555566/4296 4298 21586 22216 29023 29045 29728 29730 37867 39129 39131 39350 39353 39356 41466 41678 42177 42210 42216https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/147/138?format=asciiOpticaldefaultJ/AJ/147/138/clustersStudied open clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterOpen cluster namemeta.id;meta.maincharprimaryNsNumber of stars observed of this clustermeta.numberintnullableRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.mainWEBDASimbad column added by the CDSmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/147/138/starsProperties and velocities of the observed red giant candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterOpen cluster name (G1)meta.id.parentcharStarStar number within the clustermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmagThe V band magnitudemagphot.mag;em.opt.VfloatDateUT date of the observationtime.epoch;obsnullableExpExposure timestime.duration;obs.exposureintInstInstrument used (1)instr.setupcharHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRVUncertainty in HRVkm/sstat.errorfloato_HRV{Delta}/{sigma}_v_ used to gauge cluster membership (2)meta.numberfloatvsiniProjected rotational velocitykm/sphys.veloc.rotatfloate_vsiniUncertainty in vsini (3)km/sstat.error;phys.veloc.rotatfloat