J/MNRAS/412/843ivo://CDS.VizieR/J/MNRAS/412/843doi:10.26093/cds/vizier.74120843CDSSuda T.Yamada S.Katsuta Y.Komiya Y.Ishizuka C.Aoki W.,Fujimoto M.Y.2024-07-13T20:15:05Z2011-11-06T18:30:09ZCDS support team

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

cds-question@unistra.frpopulation-ii-starschemically-peculiar-starschemical-abundancesWe discuss the characteristics of known extremely metal-poor (EMP) stars in the Galaxy using the Stellar Abundances for Galactic Archaeology (SAGA) data base. We find the transition of the initial mass function to be at [Fe/H]~-2 from the viewpoint of the distribution of carbon abundance and the frequency of carbon-enhanced stars. Analyses of carbon-enhanced stars in our sample suggest that nucleosynthesis in asymptotic giant branch (AGB) stars can contribute to carbon enrichment in a different way depending on whether the metallicity is above or below [Fe/H]~-2.5, which is consistent with the current models of stellar evolution at low metallicity.2011MNRAS.412..843Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/412/843CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/403/1105 : Extremely metal-poor giants equivalent widths (Francois+ 2003)J/AJ/128/2402 : Extremely metal-poor star candidates abundances (Lai+, 2004)J/AJ/132/137 : Abundances of extremely metal-poor carbon stars (Cohen+, 2006)J/A+A/490/769 : Yields from extremely metal-poor stars (Campbell+, 2008)J/A+A/501/519 : Extremely metal-poor turnoff stars abund. (Bonifacio+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/412/843https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/412/843http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/412/843https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/412/843https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/412/843http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/412/843GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/412/843/stars (C-enhandced Extremely Metal-Poor (CEMP) stars studied)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/412/843/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/412/843/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/412/843/stars?GETtext/xml+votable180.050000true15.2209667-2.47223330.0055555555555555566/524 2426 5775 8197 8314 10209 10430 16365 16415 16522 16603 16654 16659 16679-16680 16795 16814 16854 16880 17174 17221 17233 17392 17623 17679 17994 18226 18483 18507 18606 18636-18637 18653 18663 18683 18708 18719 18737 18973 19923 19968 21195 21221 22650 23199 23240 24905 24918 24975 25030 25116 25470 25551 25574 25595 25677 25723 25733 25785 25819 25948 25950 26005 26057 26176 26191 26232 26644 26658 26944 26961 26995 27030 27048 28594 30041 31136 31273 33526 34012 34037 34046 34069 34079 34504 35009 35186 35588 35752 36196 36228 36330 36410 36426 36461 36503 40319 43938 44016 44541 44607 44671 44870 44909 44939 44990 45404 45494 45806 46663 46665 46704 46792 46848 47344 47478 47519 47541 48234 48392 48501 48555 48628 48722 49078https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/412/843?format=asciiOpticaldefaultJ/MNRAS/412/843/starsC-enhandced Extremely Metal-Poor (CEMP) stars studiedl_[Ba/Fe]Limit flag on [Ba/Fe]phys.abundcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeType of CEMP or C-rich (1)src.classcharNameObject namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicitylog(Sun)phys.abund.Zfloat[C/Fe]Carbon abundancelog(Sun)phys.abundfloatl_[N/Fe]Limit flag on [N/Fe]phys.abundchar[N/Fe]? Nitrogen abundancelog(Sun)phys.abundfloatnullablel_[O/Fe]Limit flag on [O/Fe]phys.abundchar[O/Fe]? Oxygen abundancelog(Sun)phys.abundfloatnullable[Ba/Fe]? Barium abundancelog(Sun)phys.abundfloatnullablel_[Eu/Fe]Limit flag on [Eu/Fe]phys.abundchar[Eu/Fe]? Europium abundancelog(Sun)phys.abundfloatnullables/r[sr] Dominant source for neutron-capture elements, slow- or rapid-process (2)meta.codecharBin[yes ] Binaritymeta.codecharPer? Binary period if availabledtime.perioddoublenullableSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main