Ages of Galactic Globular Clusters from the New Yale Isochrones

Details Ages of Galactic Globular Clusters from the New Yale Isochrones Ages of Galactic Globular Clusters from the New Yale Isochrones

1994-11-07

arxiv.org/abs/astro-ph/9411024v1

Astronomy and Astrophysics

Astrophysics

4 pages, Latex, uses cupconf.sty complete postscript file (including figures) available via anonymous ftp to: ftp://ftp.cita

Scientific paper

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 ($\alpha = 1.7$) 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.

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