J/MNRAS/446/3319ivo://CDS.VizieR/J/MNRAS/446/3319doi:10.26093/cds/vizier.74463319CDSYong D.Grundahl F.Norris J.E.2024-08-14T20:19:04Z2017-11-15T06:27:09ZCDS support team

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

cds-question@unistra.frglobular-star-clustersapparent-magnitudeeffective-temperaturechemical-abundancesspectroscopyWe measure the C+N+O abundance sum in red giant stars in two Galactic globular clusters, NGC 1851 and NGC 6752. NGC 1851 has a split subgiant branch which could be due to different ages or C+N+O content while NGC 6752 is representative of the least complex globular clusters. For NGC 1851 and NGC 6752, we obtain average values of A(C+N+O)=8.16+/-0.10 ({sigma}=0.34) and 7.62+/-0.02 ({sigma}=0.06), respectively. When taking into account the measurement errors, we find a constant C+N+O abundance sum in NGC 6752. The C+N+O abundance dispersion is only 0.06 dex, and such a result requires that the source of the light element abundance variations does not increase the C+N+O sum in this cluster. For NGC 1851, we confirm a large spread in C+N+O. In this cluster, the anomalous RGB has a higher C+N+O content than the canonical RGB by a factor of 4 (~0.6 dex). This result lends further support to the idea that the two subgiant branches in NGC 1851 are roughly coeval, but with different CNO abundances.2015MNRAS.446.3319Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/3319CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/333/479 : NGC 1851 dynamical and evolutionary propertiesJ/A+A/404/187 : Equivalent widths for metal-poor stars (Gratton+, 2003)J/A+A/533/A69 : Spectroscopy of 124 RGB stars in NGC 1851 (Carretta+, 2011)J/MNRAS/442/3044 : Photometry and abundances of NGC1851 stars (Marino+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/3319https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/3319http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/3319https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/3319https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/3319http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/3319GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/3319/table2 (Stellar parameters and CNO abundances for NGC 1851)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/3319/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/3319/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/3319/table2?GETtext/xml+votable180.050000true78.4977083-40.08960830.0055555555555555566/34242-342433.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/3319?format=asciidefaultJ/MNRAS/446/3319/table2Stellar parameters and CNO abundances for NGC 1851recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (NR NNNN)meta.id;meta.maincharOName? Other star name (NNN) (1)meta.idintnullableRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmagV-band magnitudemagphot.mag;em.opt.VfloatCMDGroup from colour-magnitude diagrammeta.idcharTeffEffective temperatureKphys.temperature.effectiveintlog(g)Surface gravitylog(cm.s**-2)phys.gravityfloatVt? Microturbulent velocitykm/sphys.velocfloatnullablen_Vt[a] Note on Vt (2)meta.notechar[Fe/H]? Metallicityphys.abund.ZfloatnullableC? Carbon abundancephys.abundfloatnullableN? Nitrogen abundance (3)phys.abundfloatnullableO? Oxygen abundancephys.abundfloatnullableC+N+O? Carbon nitrogen and oxygen abundance sumphys.abundfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/446/3319/table4Line list for the NGC 1851 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaWavelength ({AA})0.1nmem.wlfloatSpeciesSpecies identifier (1)meta.id;meta.mainfloatLEPLower Excitation PotentialeVphys.atmol.excitation;stat.minfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloatLine1? NR 712 line wavelength (m{AA})0.1pmem.wlfloatnullableLine2? NR 1290 line wavelength (m{AA})0.1pmem.wlfloatnullableLine3? NR 1469 line wavelength (m{AA})0.1pmem.wlfloatnullableLine4? NR 2352 line wavelength (m{AA})0.1pmem.wlfloatnullableLine5? NR 2953 line wavelength (m{AA})0.1pmem.wlfloatnullableLine6? NR 3213 line wavelength (m{AA})0.1pmem.wlfloatnullableLine7? NR 3272 line wavelength (m{AA})0.1pmem.wlfloatnullableLine8? NR 4740 line wavelength (m{AA})0.1pmem.wlfloatnullableLine9? NR 5171 line wavelength (m{AA})0.1pmem.wlfloatnullableLine10? NR 5246 line wavelength (m{AA})0.1pmem.wlfloatnullableLine11? NR 5543 line wavelength (m{AA})0.1pmem.wlfloatnullableLine12? NR 6217 line wavelength (m{AA})0.1pmem.wlfloatnullableLine13? NR 6221 line wavelength (m{AA})0.1pmem.wlfloatnullableLine14? NR 6250 line wavelength (m{AA})0.1pmem.wlfloatnullableLine15? NR 8066 line wavelength (m{AA})0.1pmem.wlfloatnullableSource[ABC] Source (2)meta.bibchar