Globular Cluster Colors Versus Population Synthesis Models

Details Globular Cluster Colors Versus Population Synthesis Models Globular Cluster Colors Versus Population Synthesis Models

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813312b&link_type=abstract

American Astronomical Society, AAS Meeting #218, #133.12; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Although the stellar populations of globular clusters are not as simple as we used to believe, they are still the simplest populations available in the nearby universe. As such, they are extremely useful for testing stellar population synthesis models. Using recent mass estimates for Local Group globular clusters, we have compiled a sample of clusters with masses large enough that stochastic effects on integrated photometry should be minimal. We have measured integrated colors in the Spitzer/IRAC bands for as many of these as possible, paying careful attention to systematics in order to get the most accurate colors. We present a comparison of the results with the predictions of the latest generation of population synthesis models, including GALEV and FSPS.
Support for this work was provided by a Discovery Grant and an Undergraduate Summer Research Award from NSERC and by an Ontario Early Researcher Award.

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