Abundances in the early Galaxy

DOI

In 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. , 1999, Cat. ), 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).

Cone search capability for table J/A+A/416/1117/table2 (Precise coordinates of the BPS programme stars (positions of other stars added from Simbad))

Identifier
DOI http://doi.org/10.26093/cds/vizier.34161117
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/416/1117
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/416/1117
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/416/1117
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/416/1117
Provenance
Creator Cayrel 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.
Publisher CDS
Publication Year 2004
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Physics; Stellar Astronomy