Metal rich stars in solar neighbourhood Virtual Observatory Resource

Authors
  1. Trevisan M.
  2. Barbuy B.
  3. Eriksson K.
  4. Gustafsson B.
  5. Grenon M.
  6. Pompeia L.
  7. Published by
    CDS
Abstract

The analysis of 71 metal-rich stars is based on optical high-resolution echelle spectra obtained with the FEROS spectrograph at the ESO 1.52-m Telescope at La Silla, Chile. The metallicities and abundances of C, O, Mg, Si, Ca, and Ti were derived based on LTE detailed analysis, employing the MARCS model atmospheres. We confirm the high metallicity of these stars reaching up to [FeI/H]=0.58, and the sample of metal-rich dwarfs can be kinematically subclassified in samples of thick disk, thin disk, and intermediate stellar populations. All sample stars show solar alpha-Fe ratios, and most of them are old and still quite metal rich. The orbits suggest that the thin disk, thick disk and intermediate populations were formed at Galactocentric distances of ~8kpc, ~6kpc, and ~7kpc, respectively. The mean maximum height of the thick disk subsample of Z_max_~380pc, is lower than for typical thick disk stars. A comparison of alpha-element abundances of the sample stars with bulge stars shows that the oxygen is compatible with a bulge or inner thick disk origin. Our results suggest that models of radial mixing and dynamical effects of the bar and bar/spiral arms might explain the presence of these old metal-rich dwarf stars in the solar neighbourhood.

Keywords
  1. late-type-stars
  2. chemical-abundances
Bibliographic source Bibcode
2011A&A...535A..42T
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/535/A42
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/535/A42
Document Object Identifer DOI
doi:10.26093/cds/vizier.35350042

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/535/A42
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/535/A42
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/535/A42
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/535/A42/stars?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/535/A42/stars?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/535/A42/stars?

History

2011-10-31T07:20:10Z
Resource record created
2011-10-31T07:20:10Z
Created
2017-06-12T08:24:28Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr