COMBS survey. Galactic Bulge metal-poor stars Virtual Observatory Resource

Authors
  1. Lucey M.
  2. Hawkins K.
  3. Ness M.
  4. Asplund M.
  5. Bensby T.
  6. Casagrande L.,Feltzing S.
  7. Freeman K.C.
  8. Kobayashi C.
  9. Marino A.F.
  10. Published by
    CDS
Abstract

Chemistry and kinematic studies can determine the origins of stellar population across the Milky Way. The metallicity distribution function of the bulge indicates that it comprises multiple populations, the more metal-poor end of which is particularly poorly understood. It is currently unknown if metal-poor bulge stars ([Fe/H]<-1dex) are part of the stellar halo in the inner most region, or a distinct bulge population or a combination of these. Cosmological simulations also indicate that the metal-poor bulge stars may be the oldest stars in the Galaxy. In this study, we successfully target metal-poor bulge stars selected using SkyMapper photometry. We determine the stellar parameters of 26 stars and their elemental abundances for 22 elements using R~47000 VLT/UVES spectra and contrast their elemental properties with that of other Galactic stellar populations. We find that the elemental abundances we derive for our metal-poor bulge stars have lower overall scatter than typically found in the halo. This indicates that these stars may be a distinct population confined to the bulge. If these stars are, alternatively, part of the inner-most distribution of the halo, this indicates that the halo is more chemically homogeneous at small Galactic radii than at large radii. We also find two stars whose chemistry is consistent with second-generation globular cluster stars. This paper is the first part of the Chemical Origins of Metal-poor Bulge Stars (COMBS) survey that will chemo-dynamically characterize the metal-poor bulge population.

Keywords
  1. surveys
  2. population-ii-stars
  3. chemical-abundances
  4. radial-velocity
Bibliographic source Bibcode
2019MNRAS.488.2283L
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/488/2283
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/488/2283
Document Object Identifer DOI
doi:10.26093/cds/vizier.74882283

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/488/2283
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/488/2283
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/488/2283
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/MNRAS/488/2283/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/488/2283/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/488/2283/table2?

History

2020-06-25T07:18:06Z
Resource record created
2020-06-25T07:18:06Z
Created
2024-08-20T20:12:01Z
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