J/A+A/513/A29ivo://CDS.VizieR/J/A+A/513/A29doi:10.26093/cds/vizier.35130029CDSMessina S.Padmakar PariharKoo J.R.Kim S.-L.Rey S.-C.Lee C.-U.2011-05-03T11:12:21Z2010-05-10T09:46:29ZCDS support team

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

cds-question@unistra.fropen-star-clusterslate-type-starsvisible-astronomybroad-band-photometryRotation and magnetic activity are intimately linked in main-sequence stars of G or later spectral types. The presence and level of magnetic activity depend on stellar rotation, and rotation itself is strongly influenced by strength and topology of the magnetic fields. Open clusters represent especially useful targets to investigate the rotation/activity/age connection. The open cluster M11 has been studied as a part of the RACE-OC project (Rotation and ACtivity Evolution in Open Clusters), which is aimed at exploring the evolution of rotation and magnetic activity in the late-type members of open clusters with different ages. Photometric observations of the open cluster M11 were carried out in June 2004 using LOAO 1m telescope. The rotation periods of the cluster members are determined by Fourier analysis of photometric data time series. We further investigated the relations between the surface activity, characterized by the light curve amplitude, and rotation. We have discovered a total of 75 periodic variables in the M11 FoV, of which 38 are candidate cluster members. Specifically, among cluster members we discovered 6 early-type, 2 eclipsing binaries and 30 bona-fide single periodic late-type variables. Considering the rotation periods of 16 G-type members of the almost coeval 200-Myr M34 cluster, we could determine the rotation period distribution from a more numerous sample of 46 single G stars at an age of about 200-230 Myr and determine a median rotation period P=4.8d. A comparison with the younger M35 cluster (~150Myr) and with the older M37 cluster (~550Myr) shows that G stars rotate slower than younger M35 stars and faster than older M37 stars. The measured variation of the median rotation period is consistent with the scenario of rotational braking of main-sequence spotted stars as they age.2010A&A...513A..29Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/513/A29CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/128/255 : Proper motions in M 11 (Su+ 1998)J/A+A/412/721 : CCD {Delta}a-photometry of 5 open clusters (Paunzen+, 2003)J/PASP/119/1233 : BV photometry of M11 stars (Koo+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/513/A29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/513/A29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/513/A29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/513/A29https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/513/A29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/513/A29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/513/A29/table1 (Summary of rotation period search)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/513/A29/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/513/A29/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/513/A29/table1?GETtext/xml+votable180.050000true282.90085-6.277844440.0055555555555555566/30215 302263.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/513/A29?format=asciiOpticaldefaultJ/A+A/513/A29/table1Summary of rotation period searchrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetTarget's internal ID numbermeta.id;meta.mainintWebda? Target's Webda number (G1)meta.idintnullableRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainPerPeriod from Scargle analysis (2)dtime.periodfloate_PerUncertainty on the adopted perioddstat.errorfloatPNNormalized power from Scargle periodogram (2)src.var.indexfloat<Vmag>Mean V magnitudemagphot.mag;em.opt.VfloatLCPlot of the V-band light curvemeta.ref.urlchar(B-V)0Dereddened B-V color indexmagphot.color;em.opt.B;em.opt.VfloatVsigV-band photometric accuracymagstat.errorfloatVampV-band light curve amplitudemagphot.mag;em.opt.VfloatMm[abn] Membership code (1)meta.code.membercharEcl[yn] detected eclipse (yes or no)meta.notechar