HST Photometry of Star Clusters in Pseudo-bulges of Spiral Galaxies

Details HST Photometry of Star Clusters in Pseudo-bulges of Spiral Galaxies HST Photometry of Star Clusters in Pseudo-bulges of Spiral Galaxies

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9520s&link_type=abstract

American Astronomical Society, AAS Meeting #211, #95.20; Bulletin of the American Astronomical Society, Vol. 39, p.897

Astronomy and Astrophysics

Astronomy

Scientific paper

We use multiband HST photometry for a sample of 11 nearby late type spiral galaxies - distances from 15 to 37 Mpc - with the aim of quantifying the properties of their star cluster systems. Star clusters are identified by combining detections in 4 bands (F330W, F435W, F606W and F814W) and then compared to population synthesis models to infer their mass, age and metallicity. Photometric errors and completeness are estimated by means of artificial sources Monte Carlo simulations. In all our sample galaxies we identify two distinct populations of star clusters: young (age < 500 Myr) blue clusters with typical mass of 103 Msun and older ( 2Gyr) more massive red clusters. The latter will likely evolve into objects similar to Milky Way's globular clusters. We discuss the implications of our results.

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