Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21833404h&link_type=abstract
American Astronomical Society, AAS Meeting #218, #334.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
NGC 5253 is a dwarf galaxy that currently undergoes a violent central starburst. While the properties of the central starburst have been studied in great detail, the large-scale picture of the starburst in this galaxy remains unstudied. We present a study of star clusters in the field of NGC 5253, based on HST / ACS observations in the F435W, F555W, and F814W bands. While constraint by three-color photometry, we use STARBURST99 models to derive ages and masses for the cluster candidates, and find our observations to be consistent with an episode of star formation about 1 Gyr ago. that was able to produce thee surviving star clusters with masses between 5 to 10 x 10^5 solar masses. We compare the star cluster populations star formation history to the field star population. For the underlying old field stellar populations, we moreover derive photometric metallicity distribution functions via isochrone interpolation and investigate the presence of stellar spatial gradients.
Crnojević Denija
Gallagher III J.
Harbeck Daniel-Rolf
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