J/ApJ/733/115ivo://CDS.VizieR/J/ApJ/733/115doi:10.26093/cds/vizier.17330115CDSMeibom S.Mathieu R.D.Stassun K.G.Liebesny P.Saar S.H.2018-01-30T07:18:08Z2012-12-12T10:14:35ZCDS support team

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

cds-question@unistra.fropen-star-clusterslate-type-starsradial-velocityphotometryWe present the results of a 5 month photometric time-series survey for stellar rotation periods combined with a 4 year radial-velocity survey for membership and binarity in the 220Myr open cluster M34. We report surface rotation periods for 120 stars, 83 of which are kinematic and photometric late-type cluster members. A comparison to previous work serves to illustrate the importance of high-cadence long baseline photometric observations and membership information. The new M34 periods are less biased against slow rotation and cleaned for non-members. The rotation periods of the cluster members span over more than an order of magnitude from 0.5 days up to 11.5 days, and trace two distinct rotational sequences -fast (C) and moderate-to-slow (I)- in the color-period diagram. The sequences represent two different states (fast and slow) in the rotational evolution of the late-type cluster members. We use the color-period diagrams for M34 and for younger and older clusters to estimate the timescale for the transition from the C to the I sequence and find <~150Myr, ~150-300Myr, and ~300-600 Myr for G, early-mid K, and late K dwarfs, respectively. The small number of stars in the gap between C and I suggests a quick transition. We determine a gyrochronology age of 240Myr for M34.2011ApJ...733..115Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/733/115CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/695/679 : Stellar rotation in M35 (Meibom+, 2009)J/AJ/135/2264 : Stellar radial velocities in NGC 188 (Geller+, 2008)J/MNRAS/370/954 : VRIHalpha photometry of M34 (Irwin+, 2006)J/ApJ/602/L117 : Oxygen in Pleiades and M34 dwarfs (Schuler+, 2004)J/AJ/111/1193 : Proper motion in M34 (Jones+ 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/733/115https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/733/115http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/733/115https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/733/115https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/733/115http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/733/115GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/733/115/table2 (Data for the 120 stars with measured rotation periods in the field of M34)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/733/115/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/733/115/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/733/115/table2?GETtext/xml+votable180.050000true40.227333342.96579360.0055555555555555566/2395 24173.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/733/115?format=asciiOpticaldefaultJ/ApJ/733/115/table2Data for the 120 stars with measured rotation periods in the field of M34recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/120] Running index number (1)meta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainProtRotation perioddtime.periodfloatV0magExtinction-corrected V band magnitudemagphot.mag;em.opt.Vfloat(B-V)0? Reddening corrected (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloatnullableo_RVel? Number of RV measurementsmeta.numberintnullableRVel? Mean radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullablePRV? Membership probability from radial velocity (2)%statintnullablePPM? Membership probability from proper-motion; Jones & Prosser 1996, Cat. J/AJ/111/1193; <Cl* NGC 1039 JP NNN> in Simbad%statintnullableMm[PKNM] Membership code (3)meta.code.membercharRot[icg-] Sequence code (4)meta.codecharJP96Cross-match with Jones & Prosser, 1996, Cat. J/AJ/111/1193, within 5"meta.ref.urlintnullable