Resolving Extragalactic Star Clusters with HST/ACS

Details Resolving Extragalactic Star Clusters with HST/ACS Resolving Extragalactic Star Clusters with HST/ACS

2007-07-02

arxiv.org/abs/0707.0205v1

Astronomy and Astrophysics

Astrophysics

4 pages, incl. 2 figures. To appear in the proceedings of the 41st ESLAB Symposium, "The impact of HST on European astronomy",

Scientific paper

With HST, colour-magnitude diagrams (CMDs) can be obtained for young star clusters well beyond the Local Group. Such data can help constrain cluster ages and metallicities, and also provide a reference against which intermediate- and high mass stellar models can be compared. Here, CMDs are presented for two massive (>10^5 Msun) clusters and compared with Padua and Geneva isochrones. The problem of the ratio of blue to red supergiants is also addressed.

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