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Accurate Parallaxes and Stellar Ages Determinations

Published online by Cambridge University Press:  07 August 2017

Y. Lebreton ,
E. Michel ,
M.J. Goupil ,
A. Baglin  and
J. Fernandes
Y. Lebreton
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Section de Meudon 92195 MEUDON Cedex, France
E. Michel
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Section de Meudon 92195 MEUDON Cedex, France
M.J. Goupil
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Section de Meudon 92195 MEUDON Cedex, France
A. Baglin
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Section de Meudon 92195 MEUDON Cedex, France
J. Fernandes
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Section de Meudon 92195 MEUDON Cedex, France

Abstract

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Uncertainties on stellar ages due to the physical description of the stellar material entering the models and to measurements of global parameters and chemical composition are estimated in the case of A/F stars.

With combined efforts on atmosphere modeling (to improve global parameters), on asteroseismology (to improve the physical description of the stellar interior) and on distance determination at the level of the sub-milliarcsecond (to improve luminosity), an accuracy on age determination of about 10% is foreseeable.

Type
2. Current and Future Needs for Very Accurate Astrometry
Information
Symposium - International Astronomical Union , Volume 166: Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry , 1995 , pp. 135 - 142
Copyright
Copyright © Kluwer 1995 

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