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Title:
Revised ages for stars in the solar neighbourhood
Authors:
Ng, Y. K.; Bertelli, G.
Affiliation:
AA(Padova Astronomical Observatory, Vicolo dell'Osservatorio 5, I-35122 Padua, Italy (Y)), AB(Department of Astronomy, Vicolo dell'Osservatorio 5, I-35122 Padua, Italy (B)\; National Council of Research, CNR -- GNA, Rome, Italy)
Publication:
Astronomy and Astrophysics, v.329, p.943-950 (1998) (A&A Homepage)
Publication Date:
01/1998
Origin:
A&A
A&A Keywords:
METHODS: DATA ANALYSIS, STARS: STATISTICS, HR-DIAGRAM, GALAXY: SOLAR NEIGHBOURHOOD
Bibliographic Code:
1998A&A...329..943N

Abstract

New ages are computed for the stars from the Edvardsson et al. (1993) data set. The revised values are systematically larger toward older ages (t>4 Gyr), while they are slightly lower for t<4 Gyr. A similar, but considerably smaller trend is present when the ages are computed with the distances based on Hipparcos parallaxes. The resulting age-metallicity relation has a small, but distinct slope of ~ em0.07 dex/Gyr. Tables 3\to8 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or WWW at URL http://cdsweb.u-strasbg.fr/Abstract.html

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