J/A+A/690/A158ivo://CDS.VizieR/J/A+A/690/A158doi:10.26093/cds/vizier.36900158CDSCarretta EBragaglia A.2025-02-24T20:01:30Z2024-10-07T08:14:22ZCDS support team

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

cds-question@unistra.fropen-star-clustersultraviolet-photometrytwo-color-diagramschemical-abundancesMultiple populations (MPs) in globular clusters (GCs) are stars distinct by their abundances of light elements. The MPs can be directly separated by measuring abundances of C, N, O, Na, Al, Mg with spectroscopy or indirectly from photometric sequences created by the impact of different chemistry on band passes of particular filters, such as the HST pseudo-colours in the ultraviolet. An attempt to link HST pseudo-colours maps (PCMs) and spectroscopy was done by Marino et al. (2019MNRAS.487.3815M), using abundances mostly from our FLAMES survey. However, we uncovered that an incomplete census of stars in common was used in their population tagging. We correct the situation by building our own PCMs and matching them with our abundances in 20 GCs, plus two GCs from other sources, doubling the sample with spectroscopic abundances available. We found that the pseudo-colour (magF275W-2*magF336W+magF438W) does not have a monotonic trend with Na abundances, enhanced by proton-capture reactions in MPs. Moreover, on average about 16% of stars with spectroscopic Na abundances show a discrepant tagging of MPs with respect to the HST photometry. Stars with chemistry of second generation (SG) are mistaken for first generation (FG) objects according to HST photometry and vice versa. In general, photometric indices tend to overestimate the fraction of FG stars, in particular in low mass GCs. We offer a simple explanation for these findings. Finally, we publish all our PCMs, with more than 31,800 stars in 22 GCs, with star ID and coordinates, for easy check and reproduction, as it should be in science papers.2024A&A...690A.158Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A158CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/690/A158https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/690/A158http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/690/A158https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/690/A158https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/690/A158http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/690/A158GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/690/A158/tablea1 (Pseudo-colour maps (PCMs) for all 22 GCs in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A158/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A158/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A158/tablea1?GETtext/xml+votable180.050000true6.07600389-72.107040.0055555555555555566/9436 12405 12943 16647 24843 30378 31019 31417 33321 33330 34242 37294 38465 41522 42076 42314 42955 42990 47125 47168 47971 48035 48434https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/690/A158?format=asciiUVdefaultJ/A+A/690/A158/table3Stars in common between spectroscopy and HST photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNGCNGC number of galactic clustermeta.id.parentintIDStar ID from HUGS (Nardiello et al., 2018MNRAS.481.3382Nmeta.id;meta.mainchar[Na/Fe]? Abundance [Na/Fe]phys.abundfloatnullablepop[0/2] Population (1)meta.codeintFlag[F/M] star found (F) or missing (M) in Marino et al., 2019MNRAS.487.3815Mmeta.code.errorcharJ/A+A/690/A158/tablea1Pseudo-colour maps (PCMs) for all 22 GCs in the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDColPseudo-colour Delta_col_ (1)phot.color;em.UVfloatDCol3Pseudo-colour Delta_col3_ (1)phot.color;em.UVdoubleRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainindexedIDID HUGS (Nardiello et al. 2018MNRAS.481.3382N)meta.id;meta.maincharDEJ2000Declination (J2000)degpos.eq.dec;meta.mainindexedNGC? Cluster NGC numbermeta.id.parentintnullable