| Issue |
EAS Publications Series
Volume 67-68, 2014
The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases
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|---|---|---|
| Page(s) | 137 - 140 | |
| Section | The Stellar Constituents of the Milky Way | |
| DOI | https://doi.org/10.1051/eas/1567024 | |
| Published online | 17 July 2015 | |
N.A. Walton, F. Figueras, L. Balaguer-Núñez and C. Soubiran (eds)
EAS Publications Series, 67–68 (2014) 137-140
Impact of radial migration on the chemical evolution of the Milky Way disk
1 Sorbonne Universités, UPMC Paris 6, and CNRS, UMR 7095, Institut d'Astrophysique de Paris, France
2 Laboratoire d'Astrophysique de Marseille, OAMP, France
We study the role of radial migration of stars on the chemical evolution of the Milky Way disk with a 1D semi-analytical disk model. We describe radial migration with parametrised time- and radius-dependent diffusion coefficients, based on the analysis of a N-body+SPH simulation of a disk galaxy (analyzed by Kubryk et al. 2013). Our model reproduces well the present day values of most of the main global observables of the MW. Assuming that the thick disk is the oldest (>9 Gyr) part of the disk, we find that the adopted radial migration scheme can reproduce quantitatively the main local properties of the thin and thick disk: metallicity-distributions, dispersion in age-metallicity relation, “two-branch” behaviour in the O/Fe vs. Fe/H relation, local surface densities of stars, etc..
© EAS, EDP Sciences, 2015