J/ApJ/824/5ivo://CDS.VizieR/J/ApJ/824/5doi:10.26093/cds/vizier.18240005CDSBoberg O.M.Friel E.D.Vesperini E.2018-10-18T15:10:25Z2016-09-23T14:50:06ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsline-intensitiesvisible-astronomybroad-band-photometryWe present the Fe, Ca, Ti, Ni, Ba, Na, and O abundances for a sample of 53 red giant branch stars in the globular cluster (GC) NGC 5024 (M53). The abundances were measured from high signal-to-noise medium resolution spectra collected with the Hydra multi-object spectrograph on the Wisconsin-Indiana-Yale-NOAO 3.5m telescope. M53 is of interest because previous studies based on the morphology of the cluster's horizontal branch suggested that it might be composed primarily of first generation (FG) stars and differ from the majority of other GCs with multiple populations, which have been found to be dominated by the second generation (SG) stars. Our sample has an average [Fe/H]=-2.07 with a standard deviation of 0.07dex. This value is consistent with previously published results. The alpha-element abundances in our sample are also consistent with the trends seen in Milky Way halo stars at similar metallicities, with enhanced [Ca/Fe] and [Ti/Fe] relative to solar. We find that the Na-O anti-correlation in M53 is not as extended as other GCs with similar masses and metallicities. The ratio of SG to the total number of stars in our sample is approximately 0.27 and the SG generation is more centrally concentrated. These findings further support that M53 might be a mostly FG cluster and could give further insight into how GCs formed the light element abundance patterns we observe in them today.2016ApJ...824....5Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/824/5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)J/A+A/581/A70 : Grid of NLTE EW & NLTE corrections BaII lines (Korotin+, 2015)J/ApJ/804/109 : Equivalent widths of RGB stars in NGC 5053 (Boberg+, 2015)J/AJ/149/153 : Abundances of red giants in 10 GCs (Meszaros+, 2015)J/AJ/149/53 : RVs of 12 Milky Way globular clusters (Kimmig+, 2015)J/A+A/567/A69 : Radial velocity and photometry in NGC 4372 (Kacharov+, 2014)J/MNRAS/424/2722 : Variable stars in NGC 5024 (M53) (Bramich+, 2012)J/AJ/142/126 : CN & CH in SDSS Galactic GCs (Smolinski+, 2011)J/MNRAS/416/2265 : Variable stars in NGC 5024 (M53) (Arellano Ferro+, 2011)J/A+A/505/139 : Abundances of red giants in 17 GCs (Carretta+, 2009)J/A+A/505/117 : Abundances of red giants in 15 GCs (Carretta+, 2009)J/ApJ/681/1505 : Abundances of red giants in {omega} Cen (Johnson+, 2008)J/ApJS/161/304 : Star clusters in the MW and satellites (McLaughlin+, 2005)J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)J/A+A/358/547 : M53 variable stars V light curves (Kopacki, 2000)J/AJ/116/1775 : BV photometry of M53 (Rey+, 1998)J/PAZh/23/454 : Identification and coordinates in M 53 (Evstigneeva+, 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/824/5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/824/5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/824/5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/824/5https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/824/5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/824/5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/824/5/table2 (Observational data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/824/5/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/824/5/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/824/5/table2?GETtext/xml+votable180.050000true198.23718.18144440.0055555555555555566/27975 27981 27986 279923.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/824/5?format=asciiOpticaldefaultJ/ApJ/824/5/table3Derived atmospheric parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3/132] Identification number (G1)meta.id;meta.mainintTeff[3965/4820] Effective temperatureKphys.temperature.effectiveintBCv[-0.8/-0.3] Bolometric correction in Vphot.mag.bcfloatlogg[0.5/1.6] Log of surface gravitylog(cm.s**-2)phys.gravityfloatVt[1.5/2.3] Microturbulent velocitykm/sphys.velocfloatEWsDisplay the equivalent widths for this starmeta.ref.urlcharJ/ApJ/824/5/ewEquivalent widths (from table 4) for the 53 red giant memberslambda[6082.7/6360.9] Wavelength in Angstroms0.1nmem.wldoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3/132] Identification number (G1)meta.id;meta.mainintElSpecies name (Ca, Fe, Ni or Ti) and ionization: I=neutralmeta.idcharloggf[-6/-0.09] log oscillator strengthphys.atmol.oscStrengthfloatEP[0.8/4.8] Potential energyeVphys.energy;phys.atmol.excitationfloatEW[4.9/191]? Equivalent width; in milli-Angstroms0.1pmspect.line.eqWidthfloatnullableJ/ApJ/824/5/table2Observational datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/132] Identification number (G1)meta.id;meta.mainintprimaryRAJ2000[13] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[18] Degree of Declination (J2000)pos.eq.dec;meta.mainVmag[12.5/15.5] Apparent V band magnitude (G1)magphot.mag;em.opt.VfloatVMag[-3.76/-0.83] Absolute V band magnitudemagphys.magAbs;em.opt.Vfloat(B-V)0[0.04/1.5] Intrinsic (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloat(V-K)0[0.1/4.2] Intrinsic (V-K) color indexmagphot.color;em.opt.V;em.IR.KfloatRVel[-76.4/370.1]? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel[0.7/56]? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullableS/N[48/139]? Signal-to-Noisestat.snrintnullableo_RVel[1/5]? Number of observation in RVelmeta.numberintnullableMmMember? (75 "Y" and 17 "N")meta.code.membercharf_Mm[b] Flag on Mm (1)meta.codecharPDisplay the derived atmospheric parameters for this star (table 3)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar