Table · dataset · 2025
50 giant cluster stars abund. study
Listed in IVOA Registry (Virtual Observatory)
The abundance ratios [Y/Mg], [Y/Al], [Y/Si], [Y/Ca], and [Y/Ti] have been suggested as chemical clocks for solar-metallicity dwarf stars in the field as well as for giant stars in open clusters.
Description
To verify this last hypothesis, we derive these abundances ratios of 50 giant stars belonging to seven open clusters. To calculate the abundances, we analyse FEROS spectra assuming the LTE-hypothesis.
We confirm that [Y/Mg], [Y/Al], [Y/Si], [Y/Ca], and [Y/Ti] work as chemical clocks for field dwarf stars at the local region (d < 1 kpc) whereas for the field giants the [Y/Mg], [Y/Al], and [Y/Si] also present trends with the ages but high scattering. [Y/Ca] and [Y/Ti] do not present any correlation with ages in the field giants. In our open clusters, the behaviour is similar, [Y/Mg], [Y/Al], and [Y/Si] present evident trends, whereas [Y/Ca] versus ages is a flat and [Y/Ti] versus ages is less steep.
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We also confirm that the chemical clocks have high scatter at the early ages. In the case of the compiled sample, the chemical clocks are similar to our results but in some situations there are important differences. Several relations between abundance ratios and ages may be obtained when dwarfs and giants are analysed, confirming the non-universality of the spectroscopic age indicators.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/514/4816 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022MNRAS.514.4816K ui.adsabs.harvard.edu/abs/2022MNRAS.514.4816K ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/mnras/514/4816 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/514/4816 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |