Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20910002g&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #100.02; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
According to the popular hierarchical galaxy formation scenario, the assembly history of present-day early-type galaxies involved numerous mergers of small galactic entities. Dwarf irregular (dIrr) galaxies are widely regarded as being probable building blocks of massive galaxies. Hence, a study of old globular clusters in dIrrs, whose properties reflect the physical conditions at the time of their early formation, and a comparison with GCs in early-type galaxies can be used to quantify the dIrrs' contribution to the assembly of today's massive galaxies and their GC systems. We will present exciting results of our analysis of GC systems in a large sample of Magellanic-type, dIrr galaxies in nearby loose group environments outside the Local Group using deep HST/ACS images. We present their color (metallicity) distributions, luminosity functions, specific frequencies, structural parameters, and spatial distributions as a function of host galaxy luminosity (mass), and discuss the results in the context of the hierarchical galaxy formation scenario.
The author would like to thank the director of STScI for the award of a graduate studentship funded by the Director's Discretionary Research Fund
Georgiev Iskren
Goudfrooij Paul
Hilker Michael
Puzia Thomas H.
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