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Paper: Star Cluster Population in NGC 7727
Volume: 322, The Formation and Evolution of Massive Young Star Clusters
Page: 219
Authors: Trancho, G.; Miller, B.W.; Schweizer, F.; Whitmore, B.
Abstract: We present observations of the merger NGC7727 taken in the optical with HST and in the K-band with Gemini South in excellent seeing. Comparing the optical data with Monte-Carlo simulations (Whitmore et al. 1997) suggests the presence of an intermediate-age population, but this is not conclusive due to the age/metallicity degeneracy in optical colours. Therefore, we have obtained images in Ks with FLAMINGOS-I on Gemini South since the V-I vs. V-Ks diagram is an excellent separator of age and metallicity. Comparing the data with Bruzual & Charlot (2001) models confirms the presence of an intermediate-age population (between 1-2 Gyr) and, surprisingly, a lack of old, metal-poor clusters.
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