J/MNRAS/452/727ivo://CDS.VizieR/J/MNRAS/452/727doi:10.26093/cds/vizier.74520727CDSArellano Ferro A.Mancera Pina P.E.Bramich D.M.Giridhar S.,Ahumada J.A.Kains N.Kuppuswamy K.2024-08-15T20:14:50Z2015-09-14T07:49:44ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsphotometryWe report an analysis of new V and I CCD time series photometry of the distant globular cluster NGC 6229. The principal aims were to explore the field of the cluster in search of new variables, and to Fourier decompose the RR Lyrae light curves in pursuit of physical parameters. We found 25 new variables: 10 RRab, 5 RRc, 6 SR, 1 CW, 1 SX Phe, and 2 that we were unable to classify. Secular period changes were detected and measured in some favourable cases. The classifications of some of the known variables were rectified. The Fourier decomposition of RRab and RRc light curves was used to independently estimate the mean cluster value of [Fe/H] and distance. From the RRab stars we found [Fe/H]_UVES_ =-1.31+/-0.01(statistical)+/-0.12(systematic) ([Fe/H]_ZW_=-1.42) and a distance of 30.0+/-1.5kpc, and from the RRc stars we found [Fe/H]_UVES_=-1.29+/-0.12 and a distance of 30.7+/-1.1kpc, respectively. Absolute magnitudes, radii and masses are also reported for individual RR Lyrae stars. Also discussed are the independent estimates of the cluster distance from the tip of the red giant branch, 34.9+/-2.4kpc and from the period-luminosity relation of SX Phe stars, 28.9+/-2.2kpc. The distribution of RR Lyrae stars in the horizontal branch shows a clear empirical border between stable fundamental and first overtone pulsators which has been noted in several other clusters; we interpret it as the red edge of the first overtone instability strip.2015MNRAS.452..727Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/452/727CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/102/17 : NGC 6229 variable stars V light (Baade+, 1945)J/other/MmSAI/31.187 : Light curves of 12 variables in NGC 6229 (Mannino, 1960)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/452/727https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/452/727http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/452/727https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/452/727https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/452/727http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/452/727GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/452/727/table3 (General data for all of the confirmed variables in NGC 6229 in the FoV of our images (table 3) and positions of the 3 non-variable stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/727/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/727/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/727/table3?GETtext/xml+votable180.050000true251.7347547.49813890.0055555555555555566/10008https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/452/727?format=asciiOpticaldefaultJ/MNRAS/452/727/table3General data for all of the confirmed variables in NGC 6229 in the FoV of our images (table 3) and positions of the 3 non-variable starsPer? Perioddtime.perioddoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMoreindicates Fourier coefficients and/or physical parameters in tables 4 and 5meta.ref.urlcharVNameVariable name (1)meta.id;meta.maincharprimaryVTypeVariable type (2)meta.code;src.varchar<Vmag>? Average V magnitude (3)magphot.mag;em.opt.Vfloatnullable<Imag>? Average I magnitude (3)magphot.mag;em.opt.IfloatnullableAmpV? Amplitude in V bandmagarith.rate;src.var.amplitude;em.opt.VfloatnullableAmpI? Amplitude in I bandmagarith.rate;src.var.amplitude;em.opt.Ifloatnullablebeta? Slope betad/Myrspect.indexfloatnullableHJD? Maximum brightness date (HJD-2450000)dtime.epochdoublenullablePerB? Period from Borissova et al., 2001MNRAS.324...77Bdtime.perioddoublenullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNoteNote for non-variable starsmeta.notecharLCLight curvemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/452/727/table4Fourier coefficients Ak for k = 0, 1, 2, 3, 4, and phases {phi}21, {phi}31 and {phi}41, for RRab and RRc stars.VNameVariable namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeRR Lyrae typemeta.notecharA0A0 Fourier amplitude in Vmagmagsrc.var.amplitude;em.opt.Vfloate_A0rms uncertainty on A0magstat.errorfloatA1A1 Fourier amplitude in Vmagmagsrc.var.amplitude;em.opt.Vfloate_A1rms uncertainty on A1magstat.errorfloatA2A2 Fourier amplitude in Vmagmagsrc.var.amplitude;em.opt.Vfloate_A2rms uncertainty on A2magstat.errorfloatA3A3 Fourier amplitude in Vmagmagsrc.var.amplitude;em.opt.Vfloate_A3rms uncertainty on A3magstat.errorfloatA4A4 Fourier amplitude in Vmagmagsrc.var.amplitude;em.opt.Vfloate_A4rms uncertainty on A4magstat.errorfloatphi21{phi}21 Fourier phasestat.fit.paramfloate_phi21rms uncertainty on phi21stat.errorfloatphi31{phi}31 Fourier phasestat.fit.paramfloate_phi31rms uncertainty on phi31stat.errorfloatphi41{phi}41 Fourier phasestat.fit.paramfloate_phi41rms uncertainty on phi41stat.errorfloatDm? Deviation parameterstat.stdevfloatnullableJ/MNRAS/452/727/table5Physical parameters for the RRab and RRc starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeRR Lyrae typemeta.notecharVNameVariable namemeta.id;meta.maincharn_VName[ab] Note on Name (1)meta.notecharMean[WM ] WM when weighted mean of the RR Lyrae type for the following valuesmeta.codechar[Fe/H]? UVES metallicityphys.abund.Zfloatnullablee_[Fe/H]? rms uncertainty on [Fe/H]stat.error;phys.abund.FefloatnullableVMAG? Absolute V magnitudemagphys.magAbs;em.opt.Vfloatnullablee_VMAG? rms uncertainty on Vmagmagstat.errorfloatnullablelogTeffEffective temperaturelog(K)phys.temperature.effectivefloate_logTeff? rms uncertainty on Tefflog(K)stat.error;phys.temperature.effectivefloatnullablelogL? Luminositylog(solLum)phys.luminosityfloatnullablee_logL? rms uncertainty on logLlog(solLum)stat.errorfloatnullableMass? MasssolMassphys.massfloatnullablee_Mass? rms uncertainty on MasssolMassstat.error;phys.massfloatnullableR? RadiussolRadphys.size.radiusfloatnullablee_R? rms uncertainty on RsolRadstat.errorfloatnullable