Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..258..171d&link_type=abstract
The Ages of Stars, Proceedings of the International Astronomical Union, IAU Symposium, Volume 258, p. 171-176
Astronomy and Astrophysics
Astronomy
2
Binaries: Eclipsing, Globular Clusters: Individual: (47 Tuc), Stars: Evolution
Scientific paper
Age constraints are most often placed on globular clusters by comparing their CMDs with theoretical isochrones. The recent discoveries of detached, eclipsing binaries in such systems by the Cluster AgeS Experiment (CASE) provide new insights into their ages and, at the same time, provide much-needed tests of stellar evolution models. We describe efforts to model the properties of the detached, eclipsing binary V69 in 47 Tuc and compare age constraints derived from stellar evolution models of V69A and B with ages obtained from fitting isochrones to the cluster CMD. We determine whether or not, under reasonable assumptions of distance, reddening, and metallicity, it is possible to simultaneously constrain the age and He content of 47 Tuc.
Dotter Aaron
Kaluzny Janusz
Thompson Ian B.
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