Table · dataset · 2025
Solar analogs abundances
Listed in IVOA Registry (Virtual Observatory)
The aim of this work was to obtain precise atmospheric parameters and chemical abundances automatically for solar twins, in order to find signatures of exoplanets, assess how peculiar is the Sun compared to these stars and analyze possible fine structures in the Galactic thin disk.
Description
We developed a Neural Network algorithm using python to derive atmospheric parameters and chemical abundances for a sample of 99 solar twins previously studied in the literature directly from normalized high-quality spectra from HARPS, with resolving power R~115000 and signal-to-noise ratio S/N>400.
Results. We obtained precise atmospheric parameters and abundance ratios [X/Fe] of 20 chemical elements (Li, C, O, Na, Mg, Al, Si, S, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Y and Ba). The results obtained are in line with the literature, with average differences and standard deviations of (2+/-27)K for Teff , (0.00+/-0.06)dex for logg, (0.00+/-0.02)dex for [Fe/H], (-0.01+/-0.05)km/s for micro turbulence velocity (vt), (0.02+/-0.08)km/s for macro turbulence velocity (vmacro) and (-0.12+/-0.26)km/s for projected rotational velocity (vsini).
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Regarding the chemical abundances, most of the elements agree with the literature within 0.01-0.02dex. The abundances were corrected from the effects of the Galactic Chemical Evolution through a fitting versus the age of the stars and analyzed with the condensation temperature (Tcond ) to verify if the stars presented depletion of refractories compared to volatiles. We found that the Sun is more depleted in refractory elements compared to volatiles than 89% of the studied solar twins, with a significance of 9.5{sigma} when compared to the stars without detected exoplanets.
We also found the possible presence of three subpopulations in the solar twins, one Cu-rich, one Cu-poor, and the other slightly older and poor in Na.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/699/A46 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...699A..46M ui.adsabs.harvard.edu/abs/2025A%26A...699A..46M ↗
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/a%2Ba/699/a46 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 73%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/699/a46 | 15 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| concepts[field].local:field:astronomy | mapping · 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 |