EAS Publications Series
Volume 65, 2014The Ages of Stars
|Page(s)||99 - 176|
|Published online||14 November 2014|
Y. Lebreton, D. Valls-Gabaud and C. Charbonnel (eds)
EAS Publications Series, 65 (2014) 99-176
How accurate are stellar ages based on stellar models?
I. The impact of stellar models uncertainties
1 Observatoire de Paris, GEPI, CNRS UMR 8111, 5 place Jules Janssen, 92195 Meudon, France
Institut de Physique de Rennes, Université de Rennes 1, CNRS UMR 6251, 35042 Rennes, France
2 Observatoire de Paris, LESIA, CNRS UMR 8109, 92195 Meudon, France
Among the various methods used to age-date stars, methods based on stellar model predictions are widely used, for nearly all kind of stars in large ranges of masses, chemical compositions and evolutionary stages. The precision and accuracy on the age determination depend on both the precision and number of observational constraints, and on our ability to correctly describe the stellar interior and evolution. The imperfect input physics of stellar models as well as the uncertainties on the initial chemical composition of stars are responsible for uncertainties in the age determination. We present an overview of the calculation of stellar models and discuss the impact on age of their numerous inputs.
© EAS, EDP Sciences, 2014