Star Cluster Population in NGC7727

Details Star Cluster Population in NGC7727 Star Cluster Population in NGC7727

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..322..219t&link_type=abstract

The Formation and Evolution of Massive Young Star Clusters, ASP Conference Series, Vol. 322. Edited by H.J.G.L.M. Lamers, L.J.

Astronomy and Astrophysics

Astronomy

Scientific paper

We present observations of the merger NGC7727 taken in the optical with HST and in the K-band with 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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