Abundance catalogue of solar twins in GALAH Virtual Observatory Resource

Authors
  1. Walsen K.
  2. Jofre P.
  3. Buder S.
  4. Yaxley K.
  5. Das P.
  6. Yates R. M.
  7. Hua X.,Signor T.
  8. Eldridge C.
  9. Rojas-Arriagada A.
  10. Tissera P.B.
  11. Johnston E.,Aguilera-Gomez C.
  12. Zoccali M.
  13. Gilmore G.
  14. Foley R.
  15. Published by
    CDS
Abstract

Stellar chemical abundances have proved themselves a key source of information for understanding the evolution of the Milky Way, and the scale of major stellar surveys such as GALAH have massively increased the amount of chemical data available. However, progress is hampered by the level of precision in chemical abundance data as well as the visualization methods for comparing the multidimensional outputs of chemical evolution models to stellar abundance data. Machine learning methods have greatly improved the former; while the application of tree-building or phylogenetic methods borrowed from a biology are beginning to show promise with the latter. Here we analyse a sample of GALAH solar twins to address these issues. We apply The Cannon algorithm to generate a catalogue of about 40000 solar twins with 14 high precision abundances which we use to perform a phylogenetic analysis on a selection of stars that have two different ranges of eccentricities. From our analyses we are able to find a group with mostly stars on circular orbits and some old stars with eccentric orbits whose age-[Y/Mg] relation agrees remarkably well with the chemical clocks published by previous high precision abundance studies. Our results show the power of combining survey data with machine learning and phylogenetics to reconstruct the history of the Milky Way.

Keywords
  1. milky-way-galaxy
  2. g-stars
  3. chemical-abundances
  4. visible-astronomy
Bibliographic source Bibcode
2024MNRAS.529.2946W
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/529/2946
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/529/2946

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/529/2946
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/529/2946
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/529/2946
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/529/2946/tablec1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/529/2946/tablec1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/529/2946/tablec1?

History

2024-03-28T08:44:08Z
Resource record created
2024-03-28T07:53:19Z
Updated
2024-03-28T08:44:08Z
Created

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