J/A+A/416/1117ivo://CDS.VizieR/J/A+A/416/1117doi:10.26093/cds/vizier.34161117CDSCayrel R.Depagne E.Spite M.Hill V.Spite F.Francois P.,Plez B.Beers T.Primas F.Andersen J.Barbuy B.Bonifacio P.,Molaro P.Nordstrom B.2018-01-04T08:22:39Z2004-03-22T21:51:11ZCDS support team

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

cds-question@unistra.frchemically-peculiar-starssupernovaepopulation-ii-starsIn the framework of the ESO Large Programme "First Stars", very high-quality spectra of some 70 very metal-poor dwarfs and giants were obtained with the ESO VLT and UVES spectrograph. These stars are likely to have descended from the first generation(s) of stars formed after the Big Bang, and their detailed composition provides constraints on issues such as the nature of the first supernovae, the efficiency of mixing processes in the early Galaxy, the formation and evolution of the halo of the Galaxy, and the possible sources of reionization of the Universe. This paper presents the abundance analysis of an homogeneous sample of 35 giants selected from the HK survey of Beers et al. (1992, Cat. <J/AJ/103/1987>, 1999, Cat. <J/AJ/117/981>), emphasizing stars of extremely low metallicity: 30 of our 35 stars are in the range -4.1<[Fe/H]<-2.7, and 22 stars have [Fe/H]<-3.0. Our new VLT/UVES spectra, at a resolving power of R~45000 and with signal-to-noise ratios of 100-200 per pixel over the wavelength range 330-1000 nm, are greatly superior to those of the classic studies of McWilliam et al. (1995AJ....109.2757M) and Ryan et al. (1996ApJ...471..254R).2004A&A...416.1117Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/416/1117CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/403/1105 : Extremely metal-poor giants equivalent widths (Francois+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/416/1117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/416/1117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/416/1117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/416/1117https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/416/1117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/416/1117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/416/1117/table2 (Precise coordinates of the BPS programme stars (positions of other stars added from Simbad))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/416/1117/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/416/1117/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/416/1117/table2?GETtext/xml+votable180.050000true7.8204583-16.79466670.0055555555555555566/109 189 1266 2107 3178 3714 8228 8328 8864 12613 13410 13875 14647 15613 15762 15882 15887 15909 15938 16821 18419 18896 19070 19210-19211 19584 20371 23478 26457 31585 32352 35532 48221 48798 48824https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/416/1117?format=asciiOpticaldefaultJ/A+A/416/1117/table2Precise coordinates of the BPS programme stars (positions of other stars added from Simbad)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number of the starmeta.idintprimaryNameName of the starmeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainEWDisplay the equivalent widths of all elementsmeta.refcharSimbadSimbad column added by the CDSmeta.refcharJ/A+A/416/1117/table8*Abundances of the elements from C to Zn for the 35 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number of the starmeta.idintNameName of the starmeta.id;meta.mainchar[Fe/H]Adopted metallicitylog(Sun)phys.abund.FefloatElementName of the speciesphys.atmol.elementcharlogeps? logarithm of the number of atoms of the element for 10^12 hydrogen atomsphys.abundfloatnullablel_[M/H]Limit flag on [M/H]meta.code.errorchar[M/H]? log(ratio relative to the solar ratio)log(Sun)phys.abundfloatnullablel_[M/Fe]Limit flag on [M/Fe]meta.code.errorchar[M/Fe]? log(ratio relative to the solar ratio)log(Sun)phys.abundfloatnullablee_[M/H]? Standard deviation for [M/H] and [M/Fe]log(Sun)stat.errorfloatnullableNlines? Number of linesmeta.numberintnullableJ/A+A/416/1117/table3Equivalent widths and oscillator strengths of the lines (from C to Zn)loggfoscillator strengthphys.atmol.wOscStrengthfloatElementName of the speciesphys.atmol.elementcharW5? Equivalent width for star 5 : BD-18 55500.1nmspect.line.eqWidthfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdawavelength of the line0.1nmem.wldoubleKiexExcitation potentialeVphys.energy;phys.atmol.excitationfloatW1? Equivalent width for star 1 : HD 27960.1nmspect.line.eqWidthfloatnullableW2? Equivalent width for star 2 : HD 1225630.1nmspect.line.eqWidthfloatnullableW3? Equivalent width for star 3 : HD 1864780.1nmspect.line.eqWidthfloatnullableW4? Equivalent width for star 4 : BD+17 32480.1nmspect.line.eqWidthfloatnullableW6? Equivalent width for star 6 : CD-38 2450.1nmspect.line.eqWidthfloatnullableW7? Equivalent width for star 7 : BS 16467-0620.1nmspect.line.eqWidthfloatnullableW8? Equivalent width for star 8 : BS 16477-0030.1nmspect.line.eqWidthfloatnullableW9? Equivalent width for star 9 : BS 17569-0490.1nmspect.line.eqWidthfloatnullableW10? Equivalent width for star 10 : CS 22169-0350.1nmspect.line.eqWidthfloatnullablel_W11Limit flag on W11meta.code.errorcharW11? Equivalent width for star 11 : CS 22172-0020.1nmspect.line.widthfloatnullableW12? Equivalent width for star 12 : CS 22186-0250.1nmspect.line.eqWidthfloatnullableW13? Equivalent width for star 13 : CS 22189-0090.1nmspect.line.eqWidthfloatnullableW14? Equivalent width for star 14 : CS 22873-0550.1nmspect.line.eqWidthfloatnullableW15? Equivalent width for star 15 : CS 22873-1660.1nmspect.line.eqWidthfloatnullableW16? Equivalent width for star 16 : CS 22878-1010.1nmspect.line.eqWidthfloatnullableW17? Equivalent width for star 17 : CS 22885-0960.1nmspect.line.eqWidthfloatnullableW18? Equivalent width for star 18 : CS 22891-2090.1nmspect.line.eqWidthfloatnullableW19? Equivalent width for star 19 : CS 22892-0520.1nmspect.line.eqWidthfloatnullableW20? Equivalent width for star 20 : CS 22896-1540.1nmspect.line.widthfloatnullableW21? Equivalent width for star 21 : CS 22897-0080.1nmspect.line.eqWidthfloatnullableW22? Equivalent width for star 22 : CS 22948-0660.1nmspect.line.widthfloatnullableW23? Equivalent width for star 23 : CS 22949-0370.1nmspect.line.eqWidthfloatnullableW24? Equivalent width for star 24 : CS 22952-0150.1nmspect.line.eqWidthfloatnullableW25? Equivalent width for star 25 : CS 22953-0030.1nmspect.line.eqWidthfloatnullableW26? Equivalent width for star 26 : CS 22956-0500.1nmspect.line.eqWidthfloatnullableW27? Equivalent width for star 27 : CS 22966-0570.1nmspect.line.eqWidthfloatnullableW28? Equivalent width for star 28 : CS 22968-0140.1nmspect.line.eqWidthfloatnullableW29? Equivalent width for star 29 : CS 29491-0530.1nmspect.line.eqWidthfloatnullableW30? Equivalent width for star 30 : CS 29495-0410.1nmspect.line.eqWidthfloatnullableW31? Equivalent width for star 31 : CS 29502-0420.1nmspect.line.eqWidthfloatnullableW32? Equivalent width for star 32 : CS 29516-0240.1nmspect.line.eqWidthfloatnullableW33? Equivalent width for star 33 : CS 29518-0510.1nmspect.line.eqWidthfloatnullableW34? Equivalent width for star 34 : CS 30325-0940.1nmspect.line.eqWidthfloatnullableW35? Equivalent width for star 35 : CS 31082-0010.1nmspect.line.eqWidthfloatnullable