J/MNRAS/467/1112ivo://CDS.VizieR/J/MNRAS/467/1112CDSSakari C.M.Mcwilliam A.Wallerstein G.2026-06-09T13:16:36Z2026-06-09T13:40:37ZCDS support team

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

cds-question@unistra.frline-intensitiesglobular-star-clustersmagellanic-cloudsspectroscopygiant-starsvisible-astronomyinfrared-astronomyDetailed chemical abundances of two stars in the intermediate-age Large Magellanic Cloud (LMC) globular cluster NGC 1718 are presented, based on high-resolution spectroscopic observations with the MIKE spectrograph. The detailed abundances confirm NGC 1718 to be a fairly metal-rich cluster, with an average [Fe/H]~-0.55+/-0.01. The two red giants appear to have primordial O, Na, Mg and Al abundances, with no convincing signs of a composition difference between the two stars - hence, based on these two stars, NGC 1718 shows no evidence for hosting multiple populations. The Mg abundance is lower than Milky Way field stars, but is similar to LMC field stars at the same metallicity. The previous claims of very low [Mg/Fe] in NGC 1718 are therefore not supported in this study. Other abundances (Si, Ca, Ti, V, Mn, Ni, Cu, Rb, Y, Zr, La and Eu) all follow the LMC field star trend, demonstrating yet again that (for most elements) globular clusters trace the abundances of their host galaxy's field stars. Similar to the field stars, NGC 1718 is found to be mildly deficient in explosive {alpha}-elements, but moderately to strongly deficient in O, Na, Mg, Al and Cu, elements that form during hydrostatic burning in massive stars. NGC 1718 is also enhanced in La, suggesting that it was enriched in ejecta from metal-poor asymptotic giant branch stars.2017MNRAS.467.1112Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/467/1112CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJ/834/105 : High-resolution GC abundances. II. (Colucci+, 2017)J/ApJ/829/116 : H-band spect. analysis of 25 bright M31 GCs (Sakari+, 2016)J/ApJ/819/135 : Lithium-rich giants in globular clusters (Kirby+, 2016)J/ApJ/797/116 : Chemical properties of M31 star clusters (Colucci+, 2014)J/ApJ/797/44 : Evolution and nucleosynthesis of AGB stars (Fishlock+, 2014)J/ApJ/791/39 : NGC 6218 and NGC 5904 lithium abundances (D'Orazi+, 2014)J/ApJ/778/149 : Abundances for 3 stars in Sgr dSph (McWilliam+, 2013)J/ApJ/773/L36 : NGC 5128 globular cluster abundances (Colucci+, 2013)J/ApJ/761/33 : Chemical properties of 89 stars in the LMC disk (Lapenna+, 2012)J/ApJ/746/29 : High-resolution GC abundances. IV. 8 LMC GCs (Colucci+, 2012)J/ApJ/740/106 : Abundances of 4 red giants in Pal 1 (Sakari+, 2011)J/ApJ/735/55 : High-resolution GCs abundances. III. LMC (Colucci+, 2011)J/ApJ/717/277 : Chemical composition of old LMC clusters (Mucciarelli+, 2010)J/ApJ/695/L134 : Chemical anomalies in old LMC clusters (Mucciarelli+, 2009)J/ApJ/636/821 : Abundances of Baade's Window K giants (Fulbright+, 2006)J/ApJ/617/1091 : La and Eu abundances in 85 stars (Simmerer+, 2004)J/A+A/585/A86 : Fornax dSph H4 globular cluster stars (Hendricks+, 2016)J/A+A/560/A44 : Abundances of LMC bar and disk stars (Van der Swaelmen+, 2013)J/A+A/505/139 : Abund. of red giants in 17 globular clusters (Carretta+, 2009)J/A+A/503/541 : Neutral Li in late-type stars non-LTE calcul. (Lind+, 2009)J/A+A/497/497 : Physical parameters from JHK flux (Gonzalez-Hernandez+, 2009)J/A+A/480/379 : Abundances of 59 red giants in LMC (Pompeia+, 2008)J/MNRAS/465/L39 : Lindsay 1 spectroscopy for 34 targets (Hollyhead+, 2017)J/MNRAS/449/4038 : Li abund. of giants in 3 globular clusters (D'Orazi+, 2015)J/MNRAS/448/1314 : Line list for seven target PAndAS clusters (Sakari+, 2015)J/MNRAS/444/1812 : M54 red giants abundances (Mucciarelli+, 2014)J/MNRAS/434/358 : 4 Galactic globular clusters Fe line depths (Sakari+, 2013)J/A+A/433/185 : Detailed abund. analysis of 102 F and G dwarfs (Bensby+, 2005)J/MNRAS/430/676 : Massive clusters in the LMC (Baumgardt+, 2013)J/MNRAS/403/1592 : Cool stars in galactic clusters (Buzzoni+, 2010)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/AJ/149/153 : Abund. of red giants in 10 globular clusters (Meszaros+, 2015)J/AJ/144/100 : CCD Washington CT1T2 photometry of stars in LMC (Piatti+, 2012)J/AJ/136/375 : Chemical composition of LMC red giants (Mucciarelli+, 2008)J/AJ/135/1551 : Abundances of stars in 47 Tuc (Koch+, 2008)J/AJ/132/1630 : CaII spect. in Magellanic Cloud clusters (Grocholski+, 2006)J/AJ/129/2232 : Variable stars in And I and And III (Pritzl+, 2005)J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/467/1112https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/467/1112http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/467/1112https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/467/1112https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/467/1112http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/467/1112GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/467/1112/table1 (Targets information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/467/1112/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/467/1112/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/467/1112/table1?GETtext/xml+votable180.050000true73.108333-67.049750.0055555555555555566/331238.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/467/1112?format=asciiOpticalInfrareddefaultJ/MNRAS/467/1112/table1Targets informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the sourcemeta.id;meta.mainchar2MASS2MASS (II/246) source name (JHHMMSSss+DDMMSSs)meta.idcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainJmag[13.52/13.95] 2MASS (II/246) J-band magnitudemagphot.mag;em.IR.JfloatKmag[12.56/12.9] 2MASS (II/246) K-band magnitudemagphot.mag;em.IR.KfloatDateDate of observation (UT)time.epoch;obsnullableTexp[10800/11400] Exposure timestime.duration;obs.exposureintSeeing[0.6/0.65] Seeingarcsecinstr.obsty.seeingfloatSNR[49/52] Signal-to-noise ratio (1)stat.snrintHRV[282.1/283.4] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[1] HRV uncertaintykm/sstat.error;spect.dopplerVeloc;pos.heliocentricfloatnEWNumber of EW measurements for this starmeta.numbercharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/467/1112/ew9EW line list for NGC 1718-9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaSpectral line wavelength in Angstroms (1)0.1nmem.wl;spect.linedoubleElElement and ionization statephys.atmol.element;phys.atmol.ionizationcharEPExcitation PotentialeVphys.atmol.excitationfloatEW? Equivalent width in mA1e-13mspect.line.eqWidthfloatnullableJ/MNRAS/467/1112/ew26EW line list for NGC 1718-26recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaSpectral line wavelength in Angstroms (1)0.1nmem.wl;spect.linedoubleElElement and ionization statephys.atmol.element;phys.atmol.ionizationcharEPExcitation PotentialeVphys.atmol.excitationfloatEW? Equivalent width in mA1e-13mspect.line.eqWidthfloatnullable