Ages of Galactic Globular Clusters from the New Yale Isochrones
Astrophysics
2007-05-23 v1
Abstract
A new grid of theoretical isochrones based on the Yale stellar evolution code using the OPAL and Kurucz opacities has been constructed. The grid of isochrones spans a wide range of metallicities, helium abundances and masses. The construction of the isochrones is described and the isochrones are compared to galactic globular cluster observations. A solar calibrated mixing length () yields a good fit to globular cluster colour-magnitude diagrams. Ages for 40 globular clusters are determined using the \dv method and the formation of the halo is discussed.
Keywords
Cite
@article{arxiv.astro-ph/9411024,
title = {Ages of Galactic Globular Clusters from the New Yale Isochrones},
author = {Brian Chaboyer and P. Demarque and D. B. Guenther and M. H. Pinsonneault and L. L. Pinsonneault},
journal= {arXiv preprint arXiv:astro-ph/9411024},
year = {2007}
}
Comments
4 pages, Latex, uses cupconf.sty complete postscript file (including figures) available via anonymous ftp to: ftp://ftp.cita.utoronto.ca/cita/brian/papers/age.ps