J/A+A/566/A132ivo://CDS.VizieR/J/A+A/566/A132doi:10.26093/cds/vizier.35660132CDSSilaj J.Landstreet J.D.2017-10-03T05:13:13Z2014-11-25T11:54:41ZCDS support team

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

cds-question@unistra.fropen-star-clusterseffective-temperatureTo study the time evolution of magnetic fields, chemical abundance peculiarities, and other characteristics of magnetic Ap and Bp stars during their main sequence lives, a sample of these stars in open clusters has been obtained, as such stars can be assumed to have the same ages as the clusters to which they belong. However, in exploring age determinations in the literature, we find a large dispersion among different age determinations, even for bright, nearby clusters. Our aim is to obtain ages that are as accurate as possible for the seven nearby open clusters {alpha} Per, Coma Ber, IC 2602, NGC 2232, NGC 2451A, NGC 2516, and NGC 6475, each of which contains at least one magnetic Ap or Bp star. Simultaneously, we test the current calibrations of T_e_ and luminosity for the Ap/Bp star members, and identify clearly blue stragglers in the clusters studied. We explore the possibility that isochrone fitting in the theoretical Hertzsprung-Russell diagram (i.e. log(L/L_{sun}_) vs. logT_e_), rather than in the conventional colour-magnitude diagram, can provide more precise and accurate cluster ages, with well-defined uncertainties.2014A&A...566A.132Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/566/A132CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/345/471 : Memberships of open clusters (Robichon+, 1999)J/A+AS/146/251 : Open clusters absolute proper motions. I. (Baumgardt+, 2000)J/A+A/376/441 : Absolute proper motions of 112 open clusters (Dias+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/566/A132https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/566/A132http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/566/A132https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/566/A132https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/566/A132http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/566/A132GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/566/A132/table3 (Cluster members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/566/A132/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/566/A132/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/566/A132/table3?GETtext/xml+votable180.050000true153.4414658-63.89991830.0055555555555555565/784 7120 7177 9838 6/1727 1763 1768-1770 1772 1774 3091 3093 3095 3097 3100-3101 3103 3140 3144 3146-3147 22051 22056 22058-22059 22145 28092-28094 28131 28137 28154 28437 28439 28447 28469 28484-28486 28489-28490 28494 28499 28716-28718 28720 28722 28728 37223 37229-37231 37235 37242 37271 37313 37315 37318 37320 37330 37584 37587 37590 37592-37594 37616 39343 39359 39685 39696-39697 39702 39754https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/566/A132?format=asciiOpticaldefaultJ/A+A/566/A132/clustersBasic data for clusters studied and agesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharprimaryNNumber of member stars (table3)meta.numberintnullableplxMean parallaxarcsecpos.parallax;stat.meanfloate_plxrms uncertainty in plxarcsecstat.error;pos.parallaxfloatDMTrue distance modulusmagphot.mag.distModfloate_DMrms uncertainty on DMmagstat.errorfloatDistDistancepcpos.distance;pos.heliocentricfloatE(B-V)Mean colour excessmagphot.color.excessfloate_E(B-V)rms uncertainty on E(B-V)magstat.errorfloat[Fe/H]Mean abundance log(N_Fe_/N_H_) (log(N_Fe{sun}_/N_H{sun}=[Fe/H])log(Sun)phys.abund.Fe;stat.meanfloate_[Fe/H]rms uncertainty on [Fe/H]log(Sun)stat.error;phys.abund.FefloatZDeduced heavy element mass fractionphys.massfloatlogtCluster agelog(yr)time.agefloate_logtrms uncertainty on agelog(yr)stat.errorfloatJ/A+A/566/A132/table3Cluster membersSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharHIP? HIP number of starmeta.id;meta.mainintnullableNameOther name(s) of starmeta.idcharVMag[-4.7/5.3] Absolute V magnitudemagphys.magAbs;em.opt.Vfloat(B-V)0? Deredenned B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableTeff[3820/30020]? Effective temperatureKphys.temperature.effectiveintnullablelogTeff[3.58/4.477]? log of effective temperaturelog(K)phys.temperature.effectivefloatnullablelogL? Luminositylog(solLum)phys.luminosityfloatnullableNote[abc] Nature of star: a=Ap (magnetic star); b=binary star; c=blue stragglermeta.notechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main