The age of the oldest globular clusters

Preprint

18 March 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9603092

Abstract

The age of three of the oldest clusters -- M15, M68, M92 -- has been redetermined. We use the latest EOS and opacity data available for calculating both isochrones and zero age horizontal branches and employ the brightness difference between turn-off and horizontal branch to determine the cluster age. Our best ages for all three clusters are about 13 Gyr, and even smaller ages are possible. Our results help to reconcile cluster ages with recent results on the age of the universe determined from the Hubble constant.

Keywords

GLOBULAR CLUSTERS
HORIZONTAL BRANCH
OLDEST GLOBULAR
CLUSTER AGES
OPACITY

All Related Versions

Version 1, 1996-03-18, ArXiv
Published version: The Astrophysical Journal, 479 (2), 665.

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