J/MNRAS/450/815ivo://CDS.VizieR/J/MNRAS/450/815doi:10.26093/cds/vizier.74500815CDSMarino A.F.Milone A.P.Karakas A.I.Casagrande L.Yong D.,Shingles L.Da Costa G.Norris J.E.Stetson P.B.Lind K.Asplund M.,Collet R.Jerjen H.Sbordone L.Aparicio A.Cassisi S.2024-08-14T20:22:08Z2016-03-16T14:08:46ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starschemical-abundancesWe present a high-resolution spectroscopic analysis of 62 red giants in the Milky Way globular cluster (GC) NGC 5286. We have determined abundances of representative light proton-capture, {alpha}, Fe-peak and neutron-capture element groups, and combined them with photometry of multiple sequences observed along the colour-magnitude diagram. Our principal results are: (i) a broad, bimodal distribution in s-process element abundance ratios, with two main groups, the s-poor and s-rich groups; (ii) substantial star-to-star Fe variations, with the s-rich stars having higher Fe, e.g. <[Fe/H]_s-rich_-<[Fe/H]>_s-poor_~0.1dex; and (iii) the presence of O-Na-Al (anti)correlations in both stellar groups. We have defined a new photometric index, c_BVI_=(B-V)-(V-I), to maximize the separation in the colour-magnitude diagram between the two stellar groups with different Fe and s-element content, and this index is not significantly affected by variations in light elements (such as the O-Na anticorrelation). The variations in the overall metallicity present in NGC 5286 add this object to the class of anomalous GCs. Furthermore, the chemical abundance pattern of NGC 5286 resembles that observed in some of the anomalous GCs, e.g. M 22, NGC 1851, M 2, and the more extreme {omega} Centauri, that also show internal variations in s-elements, and in light elements within stars with different Fe and s-elements content. In view of the common variations in s-elements, we propose the term s-Fe-anomalous GCs to describe this sub-class of objects. The similarities in chemical abundance ratios between these objects strongly suggest similar formation and evolution histories, possibly associated with an origin in tidally disrupted dwarf satellites.2015MNRAS.450..815Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/450/815CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/450/815https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/450/815http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/450/815https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/450/815https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/450/815http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/450/815GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/450/815/table2 (Coordinates, basic photometric data and radial velocities for the stars in the field of view of NGC5286)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/450/815/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/450/815/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/450/815/table2?GETtext/xml+votable180.050000true206.63075-51.35633330.0055555555555555566/43125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/450/815?format=asciidefaultJ/MNRAS/450/815/table2Coordinates, basic photometric data and radial velocities for the stars in the field of view of NGC5286recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrumentmeta.id;instrcharNameName (N5286_NNNNA)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBmagoOriginal B magnitudemagphot.mag;em.opt.BfloatVmagoOriginal V magnitudemagphot.mag;em.opt.VfloatImagoOriginal I magnitudemagphot.mag;em.opt.IfloatBmagc? Corrected B magnitudemagphot.mag;em.opt.BfloatnullableVmagc? Corrected V magnitudemagphot.mag;em.opt.VfloatnullableImagc? Corrected I magnitudemagphot.mag;em.opt.IfloatnullableRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatMembProbable cluster membershipmeta.code.membercharAbdindicates chemical abundances in table4meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/450/815/table3*Line list for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNote[G] G: GIRAFFE additional synthetised linesmeta.notecharlambdaWavelength0.1nmem.wldoubleSpeciesSpeciesmeta.notefloatL.E.P.Excitation potentialeVphys.energy;phys.atmol.levelfloatloggfTotal oscillator strengthphys.atmol.oscStrengthfloat1219U? Equivalent width for N5286_1219U star0.1nmspect.line.eqWidthfloatnullablen_1219U[s] s for saturatedmeta.notechar1439U? Equivalent width for N5286_1439U star0.1nmspect.line.eqWidthfloatnullablen_1439U[s] s for saturatedmeta.notechar859U? Equivalent width for N5286_859U star0.1nmspect.line.eqWidthfloatnullablen_859U[s] s for saturatedmeta.notechar1309U? Equivalent width for N5286_1309U star0.1nmspect.line.eqWidthfloatnullablen_1309U[s] s for saturatedmeta.notechar579U? Equivalent width for N5286_579U star0.1nmspect.line.eqWidthfloatnullablen_579U[s] s for saturatedmeta.notechar1339U? Equivalent width for N5286_1339U star0.1nmspect.line.eqWidthfloatnullablen_1339U[s] s for saturatedmeta.notechar177U? Equivalent width for N5286_177U star0.1nmspect.line.eqWidthfloatnullablen_177U[s] s for saturatedmeta.notecharr_loggfRefierence for loggf (1)meta.ref;pos.framecharJ/MNRAS/450/815/table4Adopted atmospheric parameters and chemical abundances derived for the NGC5286 stars observed with GIRAFFEvt? Microturbulent velocitykm/sphys.velocfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (N5286_NNNNA)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]rms uncertainty on [Fe/H]phys.abundfloat[O/Fe]? [O/Fe] abundancephys.abundfloatnullable[Na/Fe]N? NLTE [Na/Fe] abundancephys.abundfloatnullablee_[Na/Fe]N? rms uncertainty on [Na/Fe]N (1)stat.error;phys.abundfloatnullable[Na/Fe]L? LTE [Na/Fe] abundancephys.abundfloatnullablee_[Na/Fe]L? rms uncertainty on [Na/Fe]L (1)stat.error;phys.abundfloatnullable[Si/Fe]? [Si/Fe] abundancephys.abundfloatnullablee_[Si/Fe]? rms uncertainty on [Si/Fe] (1)stat.error;phys.abundfloatnullable[Ca/Fe]? [Ca/Fe] abundancephys.abundfloatnullablee_[Ca/Fe]? rms uncertainty on [Ca/Fe] (1)stat.error;phys.abundfloatnullable[Sc/Fe]? [Sc/Fe] abundancephys.abundfloatnullablee_[Sc/Fe]? rms uncertainty on [Sc/Fe] (1)stat.error;phys.abundfloatnullable[Ti/Fe]? [Ti/Fe] abundancephys.abundfloatnullable[Ni/Fe]? [Ni/Fe] abundancephys.abundfloatnullablee_[Ni/Fe]? rms uncertainty on [Ni/Fe] (1)stat.error;phys.abundfloatnullable[Ba/Fe]? [Ba/Fe] abundancephys.abundfloatnullable[La/Fe]? [La/Fe] abundancephys.abundfloatnullablee_[La/Fe]? rms uncertainty on [La/Fe] (1)stat.error;phys.abundfloatnullableGroupStatus of s-rich or s-poorsrc.classchar