J/ApJ/695/L134ivo://CDS.VizieR/J/ApJ/695/L134doi:10.26093/cds/vizier.16959134CDSMucciarelli A.Origlia L.Ferraro F.R.Pancino E.2018-02-02T10:34:12Z2011-05-10T09:54:55ZCDS support team

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

cds-question@unistra.frline-intensitiesglobular-star-clustersmagellanic-cloudsspectroscopychemical-abundancesgiant-starsBy using the multifiber spectrograph FLAMES mounted at the ESO-VLT, we have obtained high-resolution spectra for 18 giant stars, belonging to three old globular clusters of the Large Magellanic Cloud (namely NGC 1786, 2210, and 2257). While stars in each cluster showed quite homogeneous iron content, within a few cents of dex (the mean values being [Fe/H]=-1.75+/-0.01dex, -1.65+/-0.02dex and -1.95+/-0.02dex for NGC 1786, 2210, and 2257, respectively), we have detected significant inhomogeneities for the [Na/Fe], [Al/Fe], [O/Fe], and [Mg/Fe] abundance ratios, with evidence of [O/Fe] versus [Na/Fe] and [Mg/Fe] versus [Al/Fe] anticorrelations. The trends detected nicely agree with those observed in Galactic Globular Clusters, suggesting that such abundance anomalies are ubiquitous features of old stellar systems and they do not depend on the parent galaxy environment. In NGC 1786 we also detected two extreme O-poor, Na-rich stars. This is the first time that a firm signature of extreme chemical abundance anomalies has been found in an extragalactic stellar cluster.2009ApJ...695L.134Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/695/L134CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVI/110 : Final Merged Log of IUE Observations (NASA-ESA, 2000)VII/183 : The Cluster System of the LMC (Kontizas+ 1990)J/ApJ/717/277 : Chemical composition of old LMC clusters (Mucciarelli+, 2010)J/AJ/136/375 : Chemical composition of LMC red giants (Mucciarelli+, 2008)J/AJ/132/1630 : CaII spectroscopy in Magellanic Cloud clusters (Grocholski+,J/ApJ/611/270 : Magellanic star clusters IR fluctuations (Gonzalez+, 2004)J/AJ/98/2086 : CCD photometry of NGC 2257 RR Lyrae (Walker 1989)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/695/L134https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/695/L134http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/695/L134https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/695/L134https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/695/L134http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/695/L134GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/695/L134/stars (Information about the target stars from Mucciarelli et al. 2010, Cat. J/ApJ/717/277)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/695/L134/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/695/L134/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/695/L134/stars?GETtext/xml+votable180.050000true74.7878641-67.72852460.0055555555555555566/33123 37514 375507.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/695/L134?format=asciiOpticaldefaultJ/ApJ/695/L134/starsInformation about the target stars from Mucciarelli et al. 2010, Cat. J/ApJ/717/277recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGiant star name (NNNN-NNNN)meta.id;meta.maincharprimaryHRVHeliocentric velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatK0magDereddened K_0_-band magnitudemagphot.mag;em.IR.KfloatRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainInst[UG] Adopted instrumental configuration (U for UVES and G for GIRAFFE spectra)phys.atmol.configuration;instr.setupcharMOF2010Display the data from Mucciarelli et al., 2010, Cat. J/ApJ/717/277meta.ref.urlcharJ/ApJ/695/L134/table1Atomic data and equivalent widths for the sample starsl_EWLimit flag on EWmeta.code.error;spect.line.eqWidthcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGiant star name (NNNN-NNNN)meta.id;meta.maincharIonIon identificationmeta.id;phys.atmol.ionStagecharWaveWavelength in Angstroms0.1nmem.wlfloatExPotExcitation potentialeVphys.atmol.excitationfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloatEW? Equivalent width in m{AA}1e-13mspect.line.eqWidthfloatnullablef_EW[s] "s" if obtained from spectral synthesismeta.codechar