Pristine-Gaia follow-up of EMP stars Virtual Observatory Resource

Authors
  1. Viswanathan A.
  2. Yuan Z.
  3. Ardern-Arentsen A.
  4. Starkenburg E.
  5. Martin N.F.,Youakim K.
  6. Ibata R.A.
  7. Sestito F.
  8. Matsuno T.
  9. Allende Prieto C.,Barwell F.
  10. Bayer M.
  11. Doliva-Dolinsky A.
  12. Fernandez-Alvar E.,Galan-de Anta P.M.
  13. Jhass K.
  14. Longeard N.
  15. Arroyo-Polonio J.M.
  16. Massana P.,Montelius M.
  17. Rusterucci S.
  18. Santos-Torres J.
  19. Thomas G.F.
  20. Vitali S.,Wu W.
  21. Yarker P.
  22. Ye X.
  23. Aguado D.S.
  24. Gran F.
  25. Navarro J.
  26. Published by
    CDS
Abstract

We present the first spectroscopic follow-up of bright (G<15) and distant (up to 35kpc) very and extremely metal-poor (V/EMP, [Fe/H]<-2.5) red giant branch stars from the Pristine-Gaia synthetic catalogue. Using INT/IDS observations of the calcium triplet region, we confirm that 76% of our targets have [Fe/H]<-2.5, with only 3% as outliers ([Fe/H]>-2.0), demonstrating a high success rate (77% for [Fe/H]<-2.5 and 38% for [Fe/H]<-3.0). Our chemodynamical analysis reveals that 20% of stars are confined to the disc, while 46% and 34% belong to the inner and outer halo, respectively. We associate these stars with major accretion events and identify three new bright members of the metal-poor C-19 stream, including the first found above the disc plane. Our findings refine the stream's distance (~21.5kpc) and highlight the power of chemokinematic studies of V/EMP stars. We publish a catalogue of 215 V/EMP stars with 1D spectra for future analysis.

Keywords
  1. milky-way-galaxy
  2. chemically-peculiar-stars
  3. visible-astronomy
  4. spectroscopy
  5. line-intensities
Bibliographic source Bibcode
2025A&A...695A.112V
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/695/A112
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/695/A112

Access

IVOA Table Access TAP
https://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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A112/int-emps?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A112/int-emps?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A112/int-emps?

History

2025-03-12T07:29:05Z
Resource record created
2025-03-12T07:29:05Z
Created
2025-04-01T12:52:45Z
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