J/A+A/563/A76ivo://CDS.VizieR/J/A+A/563/A76doi:10.26093/cds/vizier.35630076CDSMauro F.Moni Bidin C.Geisler D.Saviane I.Da Costa G.S.,Gormaz-Matamala A.C.Vasquez S.Chene A.-N.Cohen R.Dias B.2017-11-29T11:48:06Z2014-03-13T08:15:52ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsinfrared-photometryline-intensitiesWhen they are established with sufficient precision, the ages, metallicities and kinematics of Galactic globular clusters (GGCs) can shed much light on the dynamical and chemical evolution of the Galactic halo and bulge. While the most fundamental way of determining GC abundances is by mean high-resolution spectroscopy, in practice this method is limited to only the brighter stars in the nearest and less reddened objects. This restriction has, over the years, led to the development of a large number of techniques that measure the overall abundance indirectly from parameters that correlate with overall metallicity. One of the most efficient methods is measuring of the equivalent width (EW) of the calcium II triplet (CaT) at {lambda}~~8500{AA} in red giants, which are corrected for the luminosity and temperature effects using the V magnitude differences from the horizontal branch (HB). We establish a similar method in the near-infrared (NIR), by combining the power of the differential magnitudes technique with the advantages of NIR photometry to minimize differential reddening effects. We used the Ks magnitude difference between the star and the reddest part of the HB (RHB) or of the red clump (RC) to generate reduced equivalent widths (rEW) from the previously presented datasets. Then we calibrated these rEW against three previously reported different metallicity scales; one of which we corrected using high-resolution spectroscopic metallicities.2014A&A...563A..76Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/563/A76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/540/A27 : Spectroscopy in Galactic globular clusters (Saviane+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/563/A76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/563/A76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/563/A76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/563/A76https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/563/A76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/563/A76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/563/A76/table1 (List of reddest parts of the Horizontal Branch (RHB) levels in the 30 glubular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A76/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A76/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A76/table1?GETtext/xml+votable180.050000true263.6166667-39.06916670.005555555555555556Cone search capability for table J/A+A/563/A76/table8 (Equivalent widths of the Ca-II triplet ({lambda}~850nm))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A76/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A76/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A76/table8?GETtext/xml+votable180.050000true137.94396389-64.870673890.0055555555555555566/12405 12943 24843 28705 28741 28751 28768-28769 28778 28882 28889 28962 28970 28972-28973 29233 29267 29294 29637 31019 37294 38465 41507 41513 42076 42361 42761 42955 47777 47970-47971 484347.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/563/A76?format=asciiInfrareddefaultJ/A+A/563/A76/table1List of reddest parts of the Horizontal Branch (RHB) levels in the 30 glubular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharprimaryNNumber of stars with Ca-II triplet in this clustermeta.numberintnullablePhotReference for photometry in table8 (1)meta.ref;pos.framecharKsmag(HB)Ks magnitude HB-levelmagphot.mag;em.IR.Kfloate_Ksmag(HB)rms uncertainty on Ksmag(HB)magstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/563/A76/table8Equivalent widths of the Ca-II triplet ({lambda}~850nm)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharRAJ2000Star right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Star declination (J2000)degpos.eq.dec;meta.mainJmagJ magnitude (1)magphot.mag;em.IR.Jfloate_Jmagrms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatHmagH magnitude (1)magphot.mag;em.IR.Hfloate_Hmagrms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatKsmagKs magnitude (1)magphot.mag;em.IR.Kfloate_Ksmagrms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.KfloatEWCaT equivalent width ({AA})0.1nmspect.line.eqWidthfloate_EWrms uncertainty on EW0.1nmstat.error;spect.line.eqWidthfloatRefReference (2)meta.ref;pos.framechar