VizieR Online Data Catalog: Stars from GAIA and APOGEE data (Ortigoza-Urdaneta+, 2023)
Abstract
We have used high-quality APOGEE abundances and Gaia astrometric data for 1742 red giant stars located within 5kpc of the Sun, in order to detect coherent structures associated in the chemical-kinematic-dynamical space. We limited our study to stars not rotating with the disc, i.e, Vphi<100km/s.
We determined orbital parameters using the nonaxisymmetric galactic potential model GravPot16, which, together with the stellar components for the disc and halo of the MW, also includes a rotating bar it boxy/peanut. The bar pattern velocity adopted was 41km/s/kpc. They were also determined for velocities 31 and 51km/s/kpc in order to measure the impact on the orbital parameters, since these stars may spend a significant portion of their orbits close to the Galactic plane. We did not detect significant variations in this regard. The search for structures was performed with the nonlinear algorithm of dimensional reduction known as t-SNE, using ten chemical-abundance ratios as input data: [Fe/H], [O/Fe], [Mg/Fe], [Si/Fe], [Ca/Fe], [C/Fe], [N/Fe], [Al/Fe], [Mn/Fe], and [Ni/Fe]. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- July 2023
- DOI:
- 10.26093/cds/vizier.36760140
- Bibcode:
- 2023yCat..36760140O
- Keywords:
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- Stars: nearby;
- Stars: giant;
- Abundances;
- Optical;
- Infrared