J/AJ/155/116ivo://CDS.VizieR/J/AJ/155/116doi:10.26093/cds/vizier.51550116CDSContreras Pena C.Catelan M.Grundahl F.Stephens A.W.Smith H.A.2019-12-17T12:48:19Z2018-11-12T13:06:49ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyglobular-star-clustersvariable-starsinfrared-photometryvisible-astronomybroad-band-photometrymetallicityeffective-temperatureWe present time-series BVI photometry for the Galactic globular cluster NGC 6402 (M14). The data consist of ~137 images per filter, obtained using the 0.9 and 1.0 m SMARTS telescopes at the Cerro Tololo Inter-American Observatory. The images were obtained during two observing runs in 2006-2007. The image-subtraction package ISIS, along with DAOPHOT II/ALLFRAME, was used to perform crowded-field photometry and search for variable stars. We identified 130 variables, eight of which are new discoveries. The variable star population is comprised of 56 ab-type RR Lyrae stars, 54 c-type RR Lyrae, 6 type II Cepheids, 1 W UMa star, 1 detached eclipsing binary, and 12 long-period variables. We provide Fourier decomposition parameters for the RR Lyrae, and discuss the physical parameters and photometric metallicity derived therefrom. The M14 distance modulus is also discussed, based on different approaches for the calibration of the absolute magnitudes of RR Lyrae stars. The possible presence of second-overtone RR Lyrae in M14 is critically addressed, with our results arguing against this possibility. By considering all of the RR Lyrae stars as members of the cluster, we derive <P_ab_>=0.589 days. This, together with the position of the RR Lyrae stars of both Bailey types in the period-amplitude diagram, suggests an Oosterhoff-intermediate classification for the cluster. Such an intermediate Oosterhoff type is much more commonly found in nearby extragalactic systems, and we critically discuss several other possible indications that may point to an extragalactic origin for this cluster.2018AJ....155..116Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/116CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)V/150 : Updated catalog of variable stars in globular clustersB/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)J/A+A/312/111 : [Fe/H] from RR Lyrae light curves (Jurcsik+, 1996)J/PASP/121/1378 : Positions of variable stars in globular clustersJ/A+A/548/A92 : VrI light curves of NGC1904 variables (Kains+, 2012)J/AJ/146/57 : NGC 6402. I. BV photometry (Contreras+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/116https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/116http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/116https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/116https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/116http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/116GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/116/table23 (Properties of variable stars found in M14 (tables 2 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/116/table23?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/116/table23?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/116/table23?GETtext/xml+votable180.050000true264.4057917-3.23318330.005555555555555556Cone search capability for table J/AJ/155/116/table8 (Mean physical parameters of RR Lyrae stars in GCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/116/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/116/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/116/table8?GETtext/xml+votable180.050000true267.5544167-37.05144440.0055555555555555566/9666 10008 10321 10336 12405 12425 17121 19091 21017 24843 27981 27986 28067 28705 29377 30769 31043 31417 39642 41304 42314 42841 43125 47971 48434 48698 489522.367228618189496e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/116?format=asciiOpticalInfrareddefaultJ/AJ/155/116/table23Properties of variable stars found in M14 (tables 2 and 3)Iint[12.633/16.688]? Intensity-weighted mean I magnitude (1)magphot.mag;em.opt.IfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifier (VNNN) (G1)meta.id;meta.maincharLCLight curvesmeta.ref.urlcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPer[0.25209/18.76018]? Period of the variable star; when applicabledtime.perioddoublenullableE(B-V)[-0.07/0.016] Differential reddening, {Delta}E(B-V), derived in Contreras Pena et al. (2013, J/AJ/146/57)magphot.color.excessfloatTypeVariable star classificationmeta.code;src.varcharAB[0.24/1.72]? Amplitude of the B light curvemagsrc.var.amplitudefloatnullableAV[0.11/1.34]? Amplitude of the V light curvemagsrc.var.amplitudefloatnullableAI[0.04/0.95]? Amplitude of the I light curvemagsrc.var.amplitudefloatnullableBmag[15.563/18.623] Magnitude-weighted mean B magnitude (1)magphot.mag;em.opt.BfloatVmag[14.08/17.702] Magnitude-weighted mean V magnitude (1)magphot.mag;em.opt.VfloatImag[11.647/16.691]? Magnitude-weighted mean I magnitude (1)magphot.mag;em.opt.IfloatnullableBint[15.429/18.55]? Intensity-weighted mean B magnitude (1)magphot.mag;em.opt.BfloatnullableVint[14.21/17.695]? Intensity-weighted mean V magnitude (1)magphot.mag;em.opt.VfloatnullableB-Vmag[0.601/2.417] Magnitude-weighted mean B-V color (1)magphot.color;em.opt.B;em.opt.VfloatB-Vint[0.604/1.351]? Intensity-weighted mean B-V color (1)magphot.color;em.opt.B;em.opt.VfloatnullableB-Vstat[0.596/1.362]? B-V color of the equivalent static star (1)magphot.color;em.opt.B;em.opt.VfloatnullableV-Imag[0.942/2.952]? Magnitude-weighted mean V-I color (1)magphot.color;em.opt.V;em.opt.IfloatnullableV-Iint[0.937/2.902]? Intensity-weighted mean V-I color (1)magphot.color;em.opt.V;em.opt.IfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/155/116/table45Amplitude ratios and phase differences from Fourier analysis for c-type RR Lyrae stars (table 4) and RRab stars (table 5)TypeType of variable starmeta.code;src.varcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifier (VNNN) (G1)meta.id;meta.maincharu_Star[:] Uncertainty flag on Star (1)meta.code.errorcharA21[0.038/0.612] Amplitude ratio A_2_/A_1_phot.mag;arith.ratiofloatA31[0.023/0.423] Amplitude ratio A_3_/A_1_phot.mag;arith.ratiofloatA41[0.011/0.352] Amplitude ratio A_4_/A_1_phot.mag;arith.ratiofloatPhi21[2.088/6.174] Phase difference {Phi}_2_-2{Phi}_1_stat.fit.paramfloatPhi31[0.079/6.203] Phase difference {Phi}_3_-3{Phi}_1_stat.fit.paramfloatPhi41[0.04/6.207] Phase difference {Phi}_4_-4{Phi}_1_stat.fit.paramfloatDm[1.4/143.3]? Deviation parameter D_m_ (not in Table 4) (2)stat.stdevfloatnullableJ/AJ/155/116/table67Derived parameters for c-type RR Lyrae stars (table 6) and RRab stars (table 7)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeType of variable starmeta.code;src.varcharStarStar identifier (VNNN) (G1)meta.id;meta.maincharu_Star[*] Uncertainty flag on Star (not in Table 6) (1)meta.code.errorchar[Fe/H][-1.666/-0.523] Metallicity (in the UVES scale in Table 6; in the Jurcsik (1995AcA....45..653J) scale in Table 7) (2)phys.abund.Zfloate_[Fe/H][0.062/3.079] Uncertainty in [Fe/H]U (2)stat.error;phys.abund.FefloatVMag[0.467/0.661] Intensity-averaged absolute V magnitude (from Kovacs 1998MmSAI..69...49K) (3)magphys.magAbs;em.opt.Vfloate_VMag[0.013/0.025] Uncertainty in VMag (3)magstat.error;phot.mag;em.opt.VfloatJ/AJ/155/116/table8Mean physical parameters of RR Lyrae stars in GCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharOClusterOther name for the clustermeta.idcharOoTypeOosterhoff classification (Int=Intermediate)src.classchar[Fe/H][-2.37/-0.46] Metallicity (in the Carretta et al. 2009A&A...508..695C; UVES scale)phys.abund.ZfloatM[0.47/0.76]? Mass (1)solMassphys.massfloatnullablelogL[1.41/1.81]? Log luminosity (1)log(solLum)phys.luminosityfloatnullableTeff[6282/7495]? Effective temperature (1)Kphys.temperature.effectiveintnullableY[0.24/0.29]? Helium abundance parameter (1)phys.abund.YfloatnullableVMag[0.38/0.68]? Absolute V band magnitude (2) (3)magphys.magAbs;em.opt.Vfloatnullablen_VMag[1/3]? Note on VMag (4)meta.noteintnullableTeff(V-K)[6160/6633]? Effective temperature derived from V-K color index (2)Kphys.temperature.effectiveintnullableRefReferencemeta.ref;pos.framecharBibcodeBibcode of the referencemeta.bib.bibcodecharSimbadSimbad column added by the CDSmeta.ref.urlchar_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.mainJ/AJ/155/116/table1Light curves of variable stars of M14recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifier (VNNN) (G1)meta.id;meta.maincharFilt[BVI] Filtermeta.id;instr.filtercharHJDHeliocentric Julian Date of observationdtime.epochdoublemag[11.483/19.585] Apparent magnitude in Filtmagphot.magfloate_mag[0.001/0.48] Error in magmagstat.error;phot.magfloat