The Cumulative Luminosity Function As An Age Estimator For Globular Clusters

Details The Cumulative Luminosity Function As An Age Estimator For Globular Clusters The Cumulative Luminosity Function As An Age Estimator For Globular Clusters

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110413r&link_type=abstract

American Astronomical Society, AAS Meeting #211, #104.13; Bulletin of the American Astronomical Society, Vol. 39, p.926

Astronomy and Astrophysics

Astrophysics

Scientific paper

The accuracy of globular cluster ages impacts many areas of astronomy, including stellar astrophysics, cosmology and galactic evolution. many standard dating methods suffer from a degeneracy between age and distance modulus, leading to uncertainties in the age estimates that can exceed +/-3 Gyrs. Jimienez and Padoan have devised a dating method, based on the cumulative luminosity function, that aims to achieve accuracies better than +/- 0.5 Gyrs. We have tested this method using state of the art stellar evolution models, computed by Dotter et al (2007), and empirical data from the HST/ACS Survey of Galactic Globular Clusters. Our results indicate that the uncertainties are likely to be higher once observational factors are taken into account.

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