The CoRoT-GES Collaboration. Improving Red Giants spectroscopic surface gravity and abundances with asteroseismology

TL;DR

This study combines asteroseismology with spectroscopic data from the Gaia-ESO Survey to significantly improve the accuracy of stellar parameters, ages, and chemical abundances for Red Giants in the inner Galactic Disk.

Contribution

It presents a novel joint analysis of seismic and spectroscopic data for 1,111 CoRoT Red Giants, enhancing the precision of stellar property determinations beyond standard spectroscopic methods.

Findings

Seismic data improves parameter precision over spectroscopy alone.

Derived detailed ages, chemical abundances, and orbital parameters for 534 stars.

Sample covers 5-8 kpc Galactocentric distances and 1-13 Gyr ages.

Abstract

Nowadays large spectroscopic surveys, like the Gaia-ESO Survey (GES), 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. We present a set of 1,111 CoRoT stars, observed by GES from December 2011 to July 2014, these stars belong to the CoRoT field LRc01, pointing at the inner Galactic Disk. Among these stars, 534 have reliable global seismic parameters. By combining seismic informations and spectroscopy, we derived precise stellar parameters, ages, kinematic and orbital parameters and detailed element abundances for this sample of stars. We also show that, thanks to asteroseismology, we are able to obtain a 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 (1-13 Gyrs), provides us a representative sample for the inner disk population.