J/MNRAS/493/1996ivo://CDS.VizieR/J/MNRAS/493/1996doi:10.26093/cds/vizier.74931996CDSDeras D.Arellano Ferro A.Lazaro C.Bustos Fierro I.H.Calderon J.H.,Muneer S.Giridhar S.2024-08-20T20:16:14Z2020-07-21T06:59:43ZCDS support team

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

cds-question@unistra.frglobular-star-clustersinfrared-photometryvisible-astronomyphotometryWe present an analysis of VI CCD time-series photometry of globular cluster NGC 6712. Our main goal is to study the variable star population as indicators of the cluster mean physical parameters. We employed the Fourier decomposition of RR Lyrae light curves to confirm that [Fe/H]_UVES_=-1.0+/-0.05 is a solid estimate. We estimated the reddening to the cluster as E(B-V)=0.35+/-0.04 from the RRab stars colour curves. The distance to the cluster was estimated using three independent methods which yielded a weighted mean distance <d>=8.1+/-0.2kpc. The distribution of RRab and RRc stars on the horizontal branch shows a clear segregation around the first overtone red edge of the instability strip, which seems to be a common feature in OoI-type cluster with a very red horizontal branch. We carried out a membership analysis of 60447 stars in our field of view (FoV) using the data from Gaia-DR2 and found 1529 likely members; we possess the light curves of 1100 among the member stars. This allowed us to produce a clean colour-magnitude diagram, consistent with an age of 12Gyr, and enabled us to discover close unresolved contaminants for several variable stars. From the proper motion analysis, we found evidence of non-member stars in the FoV of the cluster being tidally affected by the gravitational pull of the bulge of the Galaxy. We found that the RRab variable V6, shows a previously undetected Blazhko effect. Finally, we report 16 new variables of the EW-type (9) and SR-type (7).2020MNRAS.493.1996Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/493/1996CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/3114 : UBVR photometry of NGC 6712 with VLT (Paltrinieri+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/493/1996https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/493/1996http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/493/1996https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/493/1996https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/493/1996http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/493/1996GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/493/1996/sources (Data of member variable stars in NGC 6712 (table 3) and known, unclassified, and newly discovered field variable stars (table 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/493/1996/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/493/1996/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/493/1996/sources?GETtext/xml+votable180.050000true283.249375-8.70869440.0055555555555555566/29870https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/493/1996?format=asciiOpticalInfrareddefaultJ/MNRAS/493/1996/sourcesData of member variable stars in NGC 6712 (table 3) and known, unclassified, and newly discovered field variable stars (table 4)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTabmember (3) or known, unclassified, and newly discovered field variable stars (4)meta.codecharmoreindicates more data in tables 5, 6 and/or 7meta.ref.urlcharLCVI light curvesmeta.ref.urlcharVNameVariable name (G1)meta.id;meta.maincharprimaryn_VNameNote on VName (1)meta.notecharTypeTypemeta.code;src.varcharn_TypeNote on Type (1)meta.notechar<Vmag>Mean V magnitudemagphot.mag;em.opt.Vfloatn_<Vmag>Note on <Vmag> (1)meta.notechar<Imag>? Mean I magnitudemagphot.mag;em.opt.Ifloatnullablen_<Imag>Note on <Imag> (1)meta.notecharl_AmpVLimit flag on AmpVmeta.code.errorcharAmpV? Amplitude of variation in V bandmagarith.rate;phot.magfloatnullablel_AmpILimit flag on AmpImeta.code.errorcharAmpI? Amplitude of variation in I bandmagarith.rate;phot.magfloatnullablePer? Perioddtime.perioddoublenullableSimbadNameSimbad column added by the CDSmeta.idcharnullablen_PerNote on Per (1)meta.notecharHJDmax? Time of maximum brightnessdtime.epochdoublenullablen_HJDmaxNote on HJDmax (1)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainGaiaDR2Gaia-DR2 Sourcemeta.idJ/MNRAS/493/1996/table5Physical parameters of EW stars in NGC 6712 in the FoV of our images (Section 4.4)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable name (G1)meta.id;meta.maincharE(B-V)Redenningmagphot.color.excessfloatDistDistancekpcpos.distance;pos.heliocentricfloatM1Mass of primarysolMassphys.massfloatqMass ratio, M2/M1phys.massfloatTeff1Effective temperature on primaryKphys.temperature.effectiveintT2/1Effective temperature ratio, Teff2/Teff1phys.temperature.effective;arith.ratiofloatR1Radius on primarysolRadphys.size.radiusfloatR2Radius of secondarysolRadphys.size.radiusfloatiInclinationdegsrc.orbital.inclinationfloatJ/MNRAS/493/1996/table6Fourier coefficients Ak for k=0,1,2,3,4 and phases from the cosine series phi(c)21, phi(c)31, phi(c)41, for RRab and RRce_A1Fourier coefficient A1 errormagstat.errorfloatA2Fourier coefficient A2 for Vmagmagsrc.var.amplitudefloate_A2Fourier coefficient A2 errormagstat.errorfloatA3Fourier coefficient A3 for Vmagmagsrc.var.amplitudefloate_A3Fourier coefficient A3 errormagstat.errorfloatA4Fourier coefficient A4 for Vmagmagsrc.var.amplitudefloate_A4Fourier coefficient A4 errormagstat.errorfloatphi21Phase for the cosine series {phi}^(c)^_21_stat.fit.paramfloate_phi21Phase for the cosine series {phi}^(c)^_21_ errorstat.errorfloatphi31Phase for the cosine series {phi}^(c)^_31_stat.fit.paramfloate_phi31Phase for the cosine series {phi}^(c)^_31_ errorstat.errorfloatphi41Phase for the cosine series {phi}^(c)^_41_stat.fit.paramfloate_phi41Phase for the cosine series {phi}^(c)^_41_ errorstat.errorfloatDm? Deviation parameter Dm for the RRab stars (see Jurcsik & Kovacs, 1996, Cat. J/A+A/312/111)stat.stdevfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[RRab RRc] Typemeta.code;src.varcharVNameVariable name (G1)meta.id;meta.maincharA0Fourier coefficient A0 for Vmagmagsrc.var.amplitudefloate_A0Fourier coefficient A0 errormagstat.errorfloatA1Fourier coefficient A1 for Vmagmagsrc.var.amplitudefloatJ/MNRAS/493/1996/table7Physical parameters obtained from the Fourier fit for the RRab and RRc starsWM[wm ] wm for Weighted mean for the RR typemeta.codechar[Fe/H]JK96ZWZW metallicity from JK96 (2)phys.abund.Fefloate_[Fe/H]JK96ZWZW metallicity from JK96 errorstat.error;phys.abund.Fefloat[Fe/H]JK96UVESUVES metallicity from JK96 (2)phys.abund.Fefloate_[Fe/H]JK96UVESUVES metallicity from JK96 errorstat.error;phys.abund.Fefloat[Fe/H]N13UVESUVES metallicity from N13 (2)phys.abund.Fefloate_[Fe/H]N13UVESUVES metallicity from N13 errorstat.error;phys.abund.FefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[RRab RRc] Typemeta.code;src.varcharVNameVariable name (G1)meta.id;meta.maincharn_VNameNote on VName (1)meta.notecharVMAGAbsolute V magnitudemagphys.magAbsfloate_VMAGAbsolute V magnitude errormagstat.errorfloatlogTeffEffective temperaturelog(K)phys.temperature.effectivefloate_logTeffEffective temperature errorlog(K)stat.error;phys.temperature.effectivefloatlogLLuminositylog(solLum)phys.luminosityfloate_logLLuminosity errorlog(solLum)stat.errorfloatMassMasssolMassphys.massfloate_MassMass errorsolMassstat.error;phys.massfloatRadRadiussolRadphys.size.radiusfloate_RadRadius errorsolRadstat.errorfloatJ/MNRAS/493/1996/table2VI photometry of 42 variables in the field of NGC 6712recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable name (G1)meta.id;meta.maincharFilter[VI] Observation filterobs.param;obscharHJDHeliocentric Julian datedtime.epochdoubleindexedmagstStandard magnitudemagphot.magfloatmaginstInstrumental magnitudemagphot.magfloate_maginstError on the magnitudemagstat.errorfloat