1997/07/03 by Y. K. Ng, Ng, Y. K., G. Bertelli +1
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy and Astrophysical Research #Geophysics and Gravity Measurements #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9707043
14 pages LaTeX with 8 tables, to be published in A&A Main Journal; removed two figures, replaced two others and adjusted part of the text after constructive comments from Drs. Edvardsson, Gustafsson, and Nissen
arxiv created 1997/11/06 · arxiv updated 2009/12/01
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 about 0.07 dex/Gyr