EMBLA survey. Galactic bulge metal-poor stars Virtual Observatory Resource

Authors
  1. Howes L.M.
  2. Asplund M.
  3. Keller S.C.
  4. Casey A.R.
  5. Yong D.
  6. Lind K.,Frebel A.
  7. Hays A.
  8. Alves-Brito A.
  9. Bessell M.S.
  10. Casagrande L.,Marino A.F.
  11. Nataf D.M.
  12. Owen C.I.
  13. Da Costa G.S.
  14. Schmidt B.P.,Tisserand P.
  15. Published by
    CDS
Abstract

Cosmological models predict the oldest stars in the Galaxy should be found closest to the centre of the potential well, in the bulge. The Extremely Metal-poor BuLge stars with AAOmega survey (EMBLA) successfully searched for these old, metal-poor stars by making use of the distinctive SkyMapper photometric filters to discover candidate metal-poor stars in the bulge. Their metal-poor nature was then confirmed using the AAOmega spectrograph on the Anglo-Australian Telescope. Here we present an abundance analysis of 10 bulge stars with -2.8<[Fe/H]<-1.7 from MIKE/Magellan observations, in total determining the abundances of 22 elements. Combining these results with our previous high-resolution data taken as part of the Gaia-ESO Survey, we have started to put together a picture of the chemical and kinematic nature of the most metal-poor stars in the bulge. The currently available kinematic data are consistent with the stars belonging to the bulge, although more accurate measurements are needed to constrain the stars' orbits. The chemistry of these bulge stars deviates from that found in halo stars of the same metallicity. Two notable differences are the absence of carbon-enhanced metal-poor bulge stars, and the {alpha} element abundances exhibit a large intrinsic scatter and include stars which are underabundant in these typically enhanced elements.

Keywords
  1. milky-way-galaxy
  2. population-ii-stars
  3. chemical-abundances
Bibliographic source Bibcode
2016MNRAS.460..884H
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/460/884
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/460/884
Document Object Identifer DOI
doi:10.26093/cds/vizier.74600884

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/460/884
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/460/884
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/460/884
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/460/884/stars?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/460/884/stars?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/460/884/stars?

History

2017-11-10T13:18:26Z
Resource record created
2017-11-10T13:18:26Z
Created
2024-08-16T20:17:37Z
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