Galactic archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
Résumé
With the advent of the space missions CoRoT and Kepler, it has become feasible to determine precise asteroseismic masses and ages for large samples of red-giant stars. In this paper, we present the CoRoGEE dataset -- obtained from CoRoT lightcurves for 606 red giant stars in two fields of the Galactic disc which have been co-observed for an ancillary project of APOGEE. We have used the Bayesian parameter estimation code PARAM to calculate distances, extinctions, masses, and ages for these stars in a homogeneous analysis, resulting in relative statistical uncertainties of $\sim2\%$ in distance, $\sim4\%$ in radius, $\sim9\%$ in mass and $\sim25\%$ in age. We also assess systematic age uncertainties due to different input physics and mass loss. We discuss the correlation between ages and chemical abundance patterns of field stars over a large radial range of the Milky Way's disc (5 kpc $
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Soumis le : mardi 20 août 2019-11:58:34
Dernière modification le : vendredi 19 avril 2024-16:18:55
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Identifiants
- HAL Id : obspm-02268073 , version 1
- ARXIV : 1604.07763
- DOI : 10.1051/0004-6361/201527204
Citer
F. Anders, C. Chiappini, T. S. Rodrigues, A. Miglio, J. Montalban, et al.. Galactic archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE. Astronomy and Astrophysics - A&A, 2017, 597, pp.A30. ⟨10.1051/0004-6361/201527204⟩. ⟨obspm-02268073⟩
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