FM17p.03 — The CoRoT-GES Collaboration: the joint-action of asteroseismology and spectroscopy in the field of Galactic Archaeology

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Aug 10th at 6:00 PM until 6:00 PM




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Author(s): Marica Valentini3, Cristina Chiappini3, Andrea Miglio5, Josefina Montalbàn1, Benoit Mosser4, Thierry Morel2, Thaise Rodrigues1, Friedrich Anders3, Matthias Steinmetz3, Leo Girardi1

Institution(s): 1. INAF - Osservatorio Astronomico di Padova, 2. Institut d’Astrophysique et Géophysique de Université de Liège, 3. Leibniz-Institut für Astrophysik Potsdam (AIP), 4. LESIA, CNRS, Observatoire de Paris, 5. University of Birmingham

Nowadays large spectroscopic surveys, as the GAIA-ESO Survey, provide unique stellar databases for better investigating the formation and evolution of our Galaxy. Great attention must be paid to the accuracy of the basic stellar properties derived: large uncertainties in stellar parameters lead to large uncertainties in abundances, distances and ages. Asteroseismology has a key role in this context: when seismic information is combined with information derived from spectroscopic analysis, highly precise constraints on distances, masses, extinction and ages of Red Giants can be obtained.
In the light of this promising joint-action, we started the CoRoT-GES collaboration. GES has observed a set of 1,718 CoRoT Red Giants located in the inner disk (CoRoT field LRc01) and among these stars, 979 have reliable global seismic parameters.
We present precise stellar parameters, ages, kinematical and orbital parameters and detailed element abundances for this sample of stars. We also show that, thanks to asteroseismology, we are able to obtain an higher precision than what can be achieved by the standard spectroscopic means.
This sample of CoRoT Red Giants, spanning Galactocentric distances from 5 to 8 kpc and a wide age interval, provides us a unique dataset for testing modern chemo-dynamical models, by investigating the age-metallicy relation, chemical gradients and kinematics.