J/ApJ/612/447ivo://CDS.VizieR/J/ApJ/612/447doi:10.26093/cds/vizier.16120447CDSFulbright J.P.Rich R.M.Castro S.2005-06-17T16:14:44Z2005-06-17T16:13:25ZCDS support team

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

cds-question@unistra.frline-intensitieschemically-peculiar-starsWe report the abundance analysis of new high signal-to-noise ratio (S/N) spectra of the most metal-poor ([Fe/H]=-2.95) star currently known to be a member of a dwarf galaxy, the Draco dSph red giant D119. No absorption lines for elements heavier than Ni are detected in two Keck HIRES spectra covering the 3850-6655{AA} wavelength range, a phenomenon not previously noted in any other metal-poor star. We present upper limits for several heavy-element abundances. The most stringent limits, based on the nondetection of SrII and BaII lines, indicate that the total s- and r-process enrichment of D119 is at least 100times smaller than Galactic stars of similar metallicity. The light-element abundances are consistent with the star having formed out of material enriched primarily by massive Type II supernovae (M>20-25M_{Sun}_). If this is the case, we are forced to conclude that massive, metal-poor Type II supernovae did not contribute to the r-process in the proto-Draco environment. We compare the abundance pattern observed in D119 to current predictions of prompt enrichment and pair-instability supernovae and find that the model predictions fail by an order of magnitude or more for many elements.2004ApJ...612..447Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/612/447CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/612/447https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/612/447http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/612/447https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/612/447https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/612/447http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/612/447GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/612/447/table1Line listn_EW1[abc] Note on EW1 (3)charn_EW2[abc] Note on EW2 (3)charl_EW1Limit on EW1charEW1? Equivalent width for Draco 119pmfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmfloatIonIon (1)charEPExcitation potentialeVfloatlog(gf)? Log of oscillator strengthfloatnullablef_log(gf)[b] Flag on log(gf) (2)charEW2? Equivalent width for HD88609pmfloatnullable