J/AJ/162/126ivo://CDS.VizieR/J/AJ/162/126doi:10.26093/cds/vizier.51620126CDSDixon W.V.Chayer P.Miller Bertolami M.M.Sosa Fiscella S.V.,Benjamin R.A.Dupree A.2022-03-14T08:43:21Z2022-01-31T08:08:03ZCDS support team

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

cds-question@unistra.frspectroscopyultraviolet-astronomyvisible-astronomychemical-abundancesglobular-star-clustersThe Bright Star in the globular cluster 47Tucanae (NGC104) is a post-asymptotic giant branch (post-AGB) star of spectral type B8III. The ultraviolet spectra of late-B stars exhibit myriad absorption features, many due to species unobservable from the ground. The Bright Star thus represents a unique window into the chemistry of 47Tuc. We have analyzed observations obtained with the Far Ultraviolet Spectroscopic Explorer, the Cosmic Origins Spectrograph aboard the Hubble Space Telescope, and the Magellan Inamori Kyocera Echelle Spectrograph on the Magellan Telescope. By fitting these data with synthetic spectra, we determine various stellar parameters (Teff=10850{+/-}250K, logg=2.20{+/-}0.13) and the photospheric abundances of 26 elements, including Ne, P, Cl, Ga, Pd, In, Sn, Hg, and Pb, which have not previously been published for this cluster. Abundances of intermediate-mass elements (Mg through Ga) generally scale with Fe, while the heaviest elements (Pd through Pb) have roughly solar abundances. Its low C/O ratio indicates that the star did not undergo third dredge-up and suggests that its heavy elements were made by a previous generation of stars. If so, this pattern should be present throughout the cluster, not just in this star. Stellar-evolution models suggest that the Bright Star is powered by a He-burning shell, having left the AGB during or immediately after a thermal pulse. Its mass (0.54{+/-}0.16M{sun}) implies that single stars in 47Tuc lose 0.1-0.2M{sun} on the AGB, only slightly less than they lose on the red giant branch.2021AJ....162..126Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/162/126CatalogResearchIsServedByTAP VizieR generic servicerelated-toVI/39 : Model Atmospheres (Kurucz, 1979)VII/195 : Globular Clusters in the Milky Way (Harris, 1996)VII/202 : Globular Clusters in the Milky Way (Harris, 1997)I/337 : Gaia DR1 (Gaia Collaboration, 2016)J/AJ/143/121 : UV properties Galactic globulars with GALEX. (Schiavon+, 2012)J/A+A/572/A108 : 47 Tuc red giants chemical composition (Thygesen+, 2014)J/ApJ/780/94 : Abundances of red giants in 47 Tuc (Cordero+, 2014)J/A+A/588/A25 : Post-AGB & CSPNe evolutionary models (Miller Bertolami, 2016)J/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)J/A+A/604/A128 : S abundances for 1301 stars from GES (Duffau+, 2017)J/A+A/628/A54 : Fe, Mg, Ti in Galactic clusters (Kovalev+, 2019)J/MNRAS/485/3042 : UBVRI photometry in 48 globular clusters (Stetson+, 2019)J/A+A/649/A3 : Gaia Early DR3 photometric passbands (Riello+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/162/126https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/162/126http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/162/126https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/162/126https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/162/126http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/162/126GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVOpticaldefaultJ/AJ/162/126/tablea1Selected FUV absorption featuresIonElementphys.atmol.ionStagecharWaveWavelength; Angrstom0.1nmem.wlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Wave[a] Flag on Wave (1)meta.codecharloggf[-5.25/0.55]? Oscillator strengthphys.atmol.oscStrengthfloatnullableEl[0/82885]? Energy levelcm**-1phys.energy;phys.atmol.leveldoublenullableAbund[-11.31/-3.27]? Abundance relative to hydrogenphys.abundfloatnullablee_Abund[0.05/0.7]? Error on Anbundstat.errorfloatnullableGratingGratingmeta.notecharJ/AJ/162/126/tablea2Selected optical absorption featuresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonElementphys.atmol.ionStagecharWave[3736/8719] Wavelength; Angstrom0.1nmem.wldoubleloggf[-3.78/0.83] Oscillator strengthphys.atmol.oscStrengthfloatEl[0/149188] Energy levelcm**-1phys.energy;phys.atmol.leveldoubleEW[3.4/232.6]? Equivalent width; in milli-Angstrom0.1pmspect.line.eqWidthfloatnullablee_EW[0.8/3.3]? Error in EW0.1pmstat.error;spect.line.eqWidthfloatnullableAbund[-8.57/-3.3]? Abundance relative to Hydrogenphys.abund;arith.ratiofloatnullablee_Abund[0.01/0.3]? Error in Abundstat.errorfloatnullable