J/AJ/161/204ivo://CDS.VizieR/J/AJ/161/204doi:10.26093/cds/vizier.51610204CDSBond H.E.2022-09-30T21:45:41Z2021-07-16T07:25:35ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsastrometryvisible-astronomytrigonometric-parallaxnarrow-band-photometryIn 1972, Zinn, Newell, & Gibson (ZNG) published a list of 156 candidate UV-bright stars they had found in 27 Galactic globular clusters (GCs), based on photographs in the U and V bands. UV-bright stars lie above the horizontal branch (HB) and blueward of the asymptotic giant branch (AGB) and red giant branch in the clusters' color-magnitude diagrams. They are in rapid evolutionary phases-if they are members and not unrelated bright foreground stars. The ZNG list has inspired numerous follow-up studies, aimed at understanding late stages of stellar evolution. However, the ZNG candidates were presented only in finding charts, and celestial coordinates were not given. Using my own collection of CCD frames in u and V, I have identified all of the ZNG objects, and have assembled their coordinates, parallaxes, and proper motions from the recent Gaia Early Data Release 3 (EDR3). Based on the Gaia astrometry, I have determined which objects are probable cluster members (45% of the sample). For the members, using photometry from EDR3, I have assigned the stars to various evolutionary stages, including luminous post-AGB stars, and stars above the HB. I point out several ZNG stars of special interest that have still, to my knowledge, never been studied in detail. This study is an adjunct to a forthcoming survey of the Galactic GCs in the uBVI photometric system, designed for detection of low-gravity stars with large Balmer discontinuities.2021AJ....161..204Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/204CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/AJ/140/1119 : Radial velocities of NGC 5466 members (Shetrone+, 2010)J/AJ/142/22 : Heavy-element dispersion in M92 (Roederer+, 2011)J/AJ/143/121 : UV properties Galactic globulars with GALEX. (Schiavon+, 2012)J/AJ/149/204 : Spectroscopy of 25 stars in M68 (Schaeuble+, 2015)J/AJ/151/40 : Differential BV photometry of 5 variables in M79 (Bond+, 2016)J/ApJ/824/5 : Chemical abundances in NGC 5024 (M53) (Boberg+, 2016)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/AJ/155/116 : Globular cluster M14.II. Variable stars (Contreras Pena+, 2018)J/A+A/621/A38 : Gaia catalogue of hot subluminous stars (Geier+, 2019)J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019)J/A+A/627/A34 : GC hot UV-bright stars model spectra (Moehler+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/204https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/204http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/204https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/204https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/204http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/204GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/204/table1 (The ZNG UV-bright candidates and Gaia astrometry and photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/204/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/204/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/204/table1?GETtext/xml+votable180.050000true114.5464833338.874372220.0055555555555555566/6389 9436 9664 9666 10321 10336-10337 12405 12425 14489 19091 24843 25873 27975 27981 27984 27986 28067 28966-28967 28970 28972-28973 29216 29218 29291 29294 29377 29870 31019 31043 31115 31416-31417 42955 42990-42991 444271.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/204?format=asciiOpticaldefaultJ/AJ/161/204/table1The ZNG UV-bright candidates and Gaia astrometry and photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster NGC/M identifier(s)meta.id.parentcharZNG[1/18] ZNG numbermeta.id;meta.mainintRAJ2000[7/21] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainplx[-0.55/5.27]? Gaia EDR3 parallaxmaspos.parallax.trigfloatnullablee_plx[0.01/0.45]? Uncertainty in plxmasstat.error;pos.parallaxfloatnullablepmRA[-78.1/19.2]? Gaia EDR3 Proper motion along RAmas/yrpos.pm;pos.eq.rafloatnullablee_pmRA[0.01/0.51]? Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-89.5/17.2]? Gaia EDR3 proper motion along DEmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE[0.01/0.47]? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableGmag[9.73/17.5] Gaia EDR3 G band magnitudemagphot.mag;em.opt.VfloatBP-RP[-0.45/2.45] Gaia EDR3 (Blue-Red) colormagphot.color.excessfloatMemb?Cluster Member? (1)meta.code.membercharClassClassification (2)meta.code.classcharNote[1/53]? Additional remarks (3)meta.noteintnullableGaiaDisplay data from Gaia EDR3 (I/350) within 1"meta.ref.urlintnullable