VizieR Online Data Catalog: Abundance catalogue of solar twins in GALAH (Walsen+, 2024)

Stellar parameter and chemical abundance data for 38320 solar twin stars. The data was produced by using The Cannon (Ness et al., 2015ApJ...808...16N, cat. J/ApJ/808/16) with GALAH DR3 solar twin data (Buder et al., 2021MNRAS.506..150B, Cat. J/MNRAS/506/150). The model was trained using 150 high SNR spectra and applied over the whole solar twin catalogue, reporting new values and internal uncertainties for these labels (for more information, see paper). We report the values and internal uncertainties for following stellar parameters: effective temperature 'teff', surface gravity 'log g' and metallicity '[Fe/H]'. We also report the values and internal uncertainties for 14 chemical abundances: [Na/Fe], [Mg/Fe], [Al/Fe], [Si/Fe], [Ca/Fe], [Sc/Fe], [Ti/Fe], [Cr/Fe], [Mn/Fe], [Ni/Fe], [Cu/Fe], [Zn/Fe], [Y/Fe], [Ba/Fe].

We use our new catalogue in the construction of phylogenetic trees. For our purpose, we select from the catalogue two groups of solar twins with different orbit eccentricity. More specifically, we select the 100 stars with lowest eccentricities and 101 stars with highest eccentricities in the sample. These values come as valued-added information in GALAH and are derived from Gaia DR3 data (see Section 2 for details). The eccentricities range from 0.000723 and 0.000733 for the low-eccentricity group, and from 0.39 to 0.63 for the high eccentricity group. Our goal is to study what the phylogenetic trees built using our measurements tell us about the relatedness of our sample, and how our measurements help in this goal compared to the GALAH DR3 ones. For this experiment, we compare the phylogenies constructed from both data sets. The stars selected for the analysis are listed in Table B1. In that table, we are including the stars ID as labelled in the tips of our trees, in addition to the Gaia DR3 IDs for further references, and their ages and eccentricities as downloaded from the valued added catalogues of GALAH DR3.

(3 data files).