Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-18
Astronomy and Astrophysics
Astrophysics
16 pages,18 figures, accepted for publication in A&A
Scientific paper
We present results from ACS and WFPC observations in the low luminosity galaxy NGC 45. We identified 28 young star cluster candidates. While the exact values of age, mass, and extinction depend somewhat on the choice of SSP models, we find no young clusters with masses higher than a few 1000 Msun for any model choice. We derive the luminosity function of young star clusters and find a slope of alpha=-1.94+-0.28. We also identified 19 old globular clusters and we estimate a specific frequency of globular clusters of S_N=1.4-1.9 which is significantly higher than observed for other late-type galaxies (e.g. SMC, LMC, M33). Most of these globular clusters appear to belong to a metal-poor population, although they coincide spatially with the location of the bulge of NGC 45.
Kissler-Patig Markus
Larsen Soeren S.
Mora Marcelo D.
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