J/A+A/549/A41ivo://CDS.VizieR/J/A+A/549/A41doi:10.26093/cds/vizier.35490041CDSGratton R.G.Lucatello S.Sollima A.Carretta E.Bragaglia A.,Momany Y.D'Orazi V.Cassisi S.Pietrinferni A.Salaris M.2017-07-10T15:27:15Z2012-12-13T09:40:12ZCDS support team

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

cds-question@unistra.frglobular-star-clusterschemical-abundanceshorizontal-branch-starsTo check the impact of the multiple population scenario for globular clusters on their horizontal branch (HB), we present an analysis of the composition of 110 red HB (RHB) stars in 47 Tucanae and of 61 blue HB (BHB) and 30 RHB stars in M5. In 47 Tuc we found tight relations between the colours of the stars and their abundances of p-capture elements. This strongly supports the idea that the He content - which is expected to be closely correlated with the abundances of p-capture elements - is the third parameter (after overall metallicity and age) that determines the colour of HB stars. However, the range in He abundance must be small ({Delta}Y<0.03) in 47 Tuc to reproduce our observations; this agrees with previous analyses. There is possibly a correlation between the abundances of p- and n-capture elements in 47 Tuc. If confirmed, this might suggest that asymptotic giant branch stars of moderate mass contributed to the gas from which second-generation stars formed. Considering the selection effects in our sample (which does not include stars warmer than 11000K and RR Lyrae variables, which were excluded because we could not obtain accurate abundances with the adopted observing procedure) is important to understand our results for M5. In this case, we find that, as expected, RHB stars are Na-poor and O-rich, and likely belong to the primordial population. There is a clear correlation of the [Na/O] ratio and N abundance with colour along the BHB. A derivation of the He abundance for these stars yields a low value of Y=0.22+/-0.03. This is expected because HB stars of a putative He-rich population in this cluster should be warmer than 11000K, and would accordingly not have been sampled by our analysis. However, we need some additional source of scatter in the total mass loss of stars climbing up the red giant branch to reproduce our results for M5. Finally, we found a C-star on the HB of 47Tuc and a Ba-rich, fast-rotating, likely binary star on the HB of M5. These stars are among the brightest and coolest HB stars.2013A&A...549A..41Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/549/A41CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/534/A123 : Horizontal branch stars in NGC 2808 (Gratton+, 2011)J/A+A/539/A19 : Horizontal branch stars in NGC 1851 (Gratton+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/549/A41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/549/A41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/549/A41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/549/A41https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/549/A41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/549/A41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/549/A41/47Tuc (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/549/A41/47Tuc?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/549/A41/47Tuc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/549/A41/47Tuc?GETtext/xml+votable180.050000true5.91115-71.933561110.005555555555555556Cone search capability for table J/A+A/549/A41/M5 (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/549/A41/M5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/549/A41/M5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/549/A41/M5?GETtext/xml+votable180.050000true229.532191671.949138890.0055555555555555566/31416-31417 33321 333237.952274030004205e-20 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/549/A41?format=asciidefaultJ/A+A/549/A41/47TucCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar designationmeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainS/N12S/N of the Giraffe spectrograph in HR12 configurationstat.snrintS/N19? S/N Giraffe spectrograph in HR19 configurationstat.snrintnullableHRV? Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullableFWHM? FWHM of spectral lineskm/sspect.line.widthfloatnullableBmagB magnitudemagphot.mag;em.opt.BfloatVmagV magnitudemagphot.mag;em.opt.VfloatKmag? K magnitudemagphot.mag;em.IR.Kfloatnullable(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(V-K)0? Dereddened V-K colour indexmagphot.color;em.opt.V;em.IR.KfloatnullableTeffEffective temperatureKphys.temperature.effectiveintloggLog surface gravitylog(cm.s**-2)phys.gravityfloatSimbadSimbad column added by the CDSmeta.ref.urlcharo_[Fe/H]1Number of FeI linesmeta.numberint[Fe/H]1Value of [Fe/H] from FeI lineslog(Sun)phys.abund.Fefloate_[Fe/H]1rms of [Fe/H] from FeI lineslog(Sun)stat.error;phys.abund.Fefloato_[Fe/H]2Number of Fe II linesmeta.numberint[Fe/H]2Value of [Fe/H] from FeII lineslog(Sun)phys.abund.Fefloate_[Fe/H]2? rms of [Fe/H] from FeII lineslog(Sun)stat.error;phys.abund.Fefloatnullable[N/Fe]? Value of [N/Fe] from CN lineslog(Sun)phys.abundfloatnullableo_[O/Fe]? Number of OI linesmeta.numberintnullable[O/Fe]? Value of [O/Fe] from OI lineslog(Sun)phys.abundfloatnullablee_[O/Fe]? rms of [O/Fe] from OI lineslog(Sun)stat.error;phys.abundfloatnullableo_[Na/Fe]Number of NaI linesmeta.numberint[Na/Fe]Value of [Na/Fe] from NaI lineslog(Sun)phys.abundfloate_[Na/Fe]rms of [Na/Fe] from NaI lineslog(Sun)stat.error;phys.abundfloat[Mg/Fe]? Value of [Mg/Fe] from MgI lineslog(Sun)phys.abundfloatnullableo_[Al/Fe]? Number of AlI linesmeta.numberintnullable[Al/Fe]? Value of [Al/Fe] from AlI lineslog(Sun)phys.abundfloatnullablee_[Al/Fe]? rms of [Al/Fe] from AlI lineslog(Sun)stat.error;phys.abundfloatnullableo_[Si/Fe]Number of SiI linesmeta.numberint[Si/Fe]? Value of [Si/Fe] from SiI lineslog(Sun)phys.abundfloatnullablee_[Si/Fe]? rms of [Si/Fe] from SiI lineslog(Sun)stat.error;phys.abundfloatnullableo_[Ca/Fe]Number of CaI linesmeta.numberint[Ca/Fe]Value of [Ca/Fe] from CaI lineslog(Sun)phys.abundfloate_[Ca/Fe]? rms of [Ca/Fe] from CaI lineslog(Sun)stat.error;phys.abundfloatnullableo_[Ti/Fe]Number of TiI linesmeta.numberint[Ti/Fe]Value of [Ti/Fe] from TiI lineslog(Sun)phys.abundfloate_[Ti/Fe]rms of [Ti/Fe] from TiI lineslog(Sun)stat.error;phys.abundfloato_[V/Fe]Number of VI linesmeta.numberint[V/Fe]? Value of [V/Fe] from VI lineslog(Sun)phys.abundfloatnullablee_[V/Fe]? rms of [V/Fe] from VI lineslog(Sun)stat.error;phys.abundfloatnullableo_[Mn/Fe]Number of MnI linesmeta.numberint[Mn/Fe]Value of [Mn/Fe] from MnI lineslog(Sun)phys.abundfloate_[Mn/Fe]rms of [Mn/Fe] from MnI lineslog(Sun)stat.error;phys.abundfloato_[Ni/Fe]Number of NiI linesmeta.numberint[Ni/Fe]Value of [Ni/Fe] from NiI lineslog(Sun)phys.abundfloate_[Ni/Fe]rms of [Ni/Fe] from NiI lineslog(Sun)stat.error;phys.abundfloat[Ba/Fe]Value of [Ba/Fe] from BaII lineslog(Sun)phys.abundfloatJ/A+A/549/A41/M5Combined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar designationmeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainS/N12S/N of the Giraffe spectrograph in HR12 configurationstat.snrintS/N19? S/N Giraffe spectrograph in HR19 configurationstat.snrintnullableHRV? Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullableFWHM? FWHM of spectral lineskm/sspect.line.widthfloatnullableBmagB magnitudemagphot.mag;em.opt.BfloatVmagV magnitudemagphot.mag;em.opt.VfloatKmag? K magnitudemagphot.mag;em.IR.Kfloatnullable(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(V-K)0? Dereddened V-K colour indexmagphot.color;em.opt.V;em.IR.KfloatnullableTeffEffective temperatureKphys.temperature.effectiveintloggLog surface gravitylog(cm.s**-2)phys.gravityfloatvt? Microturbulence velocitykm/sphys.veloc.microTurbfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharo_[Fe/H]1? Number of FeI linesmeta.numberintnullable[Fe/H]1? Value of [Fe/H] from FeI lineslog(Sun)phys.abund.Fefloatnullablee_[Fe/H]1? rms of [Fe/H] from FeI lineslog(Sun)stat.error;phys.abund.Fefloatnullableo_[Fe/H]2? Number of FeII linesmeta.numberintnullable[Fe/H]2? Value of [Fe/H] from FeII lineslog(Sun)phys.abund.Fefloatnullablee_[Fe/H]2? rms of [Fe/H] from FeII lineslog(Sun)stat.error;phys.abund.Fefloatnullable[N/Fe]? Value of [N/Fe] from CN lineslog(Sun)phys.abundfloatnullable[O/Fe]? Value of [O/Fe] from OI lineslog(Sun)phys.abundfloatnullable[Na/Fe]Value of [Na/Fe] from NaI lineslog(Sun)phys.abundfloat[Mg/Fe]? Value of [Mg/Fe] from MgI and MgII lineslog(Sun)phys.abundfloatnullable[Si/Fe]? Value of [Si/Fe] from SiI lineslog(Sun)phys.abundfloatnullable[Ca/Fe]? Value of [Ca/Fe] from CaI lineslog(Sun)phys.abundfloatnullable[Mn/Fe]? Value of [Mn/Fe] from MnI lineslog(Sun)phys.abundfloatnullable[Ni/Fe]? Value of [Ni/Fe] from NiI lineslog(Sun)phys.abundfloatnullable[Ba/Fe]? Value of [Ba/Fe] from BaII lineslog(Sun)phys.abundfloatnullable