J/other/Nat/583.ivo://CDS.VizieR/J/other/Nat/583.768CDSWan Z.Lewis G.F.Li T.S.Simpson J.D.Martell S.L.Zucker D.B.,Mould J.R.Erkal D.Pace A.B.Mackey D.Ji A.P.Koposov S.E.,Kuehn K.Shipp N.Balbinot E.Bland-Hawthorn J.Casey A.R.,Da Costa G.S.Kafle P.Sharma S.De Silva G.M.2023-06-05T11:59:25Z2022-04-20T07:37:22ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsline-intensitiesvisible-astronomyGlobular clusters are some of the oldest bound stellar structures observed in the Universe. They are ubiquitous in large galaxies and are believed to trace intense star-formation events and the hierarchical build-up of structure. Observations of globular clusters in the Milky Way, and a wide variety of other galaxies, have found evidence for a 'metallicity floor', whereby no globular clusters are found with chemical (metal) abundances below approximately 0.3 to 0.4 per cent of that of the Sun. The existence of this metallicity floor may reflect a minimum mass and a maximum redshift for surviving globular clusters to form-both critical components for understanding the build-up of mass in the Universe. Here we report measurements from the Southern Stellar Streams Spectroscopic Survey of the spatially thin, dynamically cold Phoenix stellar stream in the halo of the Milky Way. The properties of the Phoenix stream are consistent with it being the tidally disrupted remains of a globular cluster. However, its metal abundance ([Fe/H]=-2.7) is substantially below the empirical metallicity floor. The Phoenix stream thus represents the debris of the most metal-poor globular clusters discovered so far, and its progenitor is distinct from the present-day globular cluster population in the local Universe. Its existence implies that globular clusters below the metallicity floor have probably existed, but were destroyed during Galactic evolution.2020Natur.583..768Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/Nat/583.768CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/Nat/583.768https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/Nat/583.768http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/Nat/583.768https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/Nat/583.768https://vizier.iucaa.in/viz-bin/votable?-source=J/other/Nat/583.768http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/Nat/583.768GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/Nat/583.768/fig2 (Equivalent widths of the CaII spectral lines for 2050 red giants in 18 Galactic globular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/Nat/583.768/fig2?https://vizier.iucaa.in/viz-bin/conesearch/J/other/Nat/583.768/fig2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/Nat/583.768/fig2?GETtext/xml+votable180.050000true5.9483672-72.04716640.0055555555555555566/16647 16658 21017 24843 27975 27981 27984 27986 27992 28751 31113 31115 31392-31393 31396 31398-31399 33315 33318 33321-33324 33330-33331 33409 34241-34243 39642 41011 42862 45045 47125 47127 47168 47745 47903 47970-47971 48434 48440https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/Nat/583.768?format=asciiOpticaldefaultJ/other/Nat/583.768/fig2Equivalent widths of the CaII spectral lines for 2050 red giants in 18 Galactic globular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintGaiaDR2GaiaDR2 designationmeta.id;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlchar[Fe/H]Metallicityphys.abund.ZfloatGMAGGaiaDR2 absolute G magnitudemagphys.magAbsdoublee_[Fe/H]Metallicity errorstat.error;phys.abund.FefloatEWEquivalent width of the CaII triplet0.1nmspect.line.eqWidthdoublee_EWEquivalent width of the CaII triplet error0.1nmstat.error;spect.line.eqWidthdoubleClusterCluster namemeta.id.parentchar_RAPositinos from Gaia DR2 (right ascension part)degpos.eq.ra;meta.main_DEPositinos from Gaia DR2 (declination part)degpos.eq.dec;meta.main