Other
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8668o&link_type=abstract
HST Proposal ID #8668
Other
Hst Proposal Id #8668 Galaxies
Scientific paper
The blue compact starbursting galaxy ESO 338-IG04 has been found to be very rich in globular clusters {GCs} of varying age, from a few Myr to 10 Gyr. Among low mass galaxies, it appears to be an extraordinary efficient GC factory, and its GC richness is fully comparable to those of giant ellipticals. An important GC formation event occured some 2.5 Gyrs ago. In this age category we find cluster no. #34, an unusually massive cluster with cal M 10^7 cal M_odot. Here, we propose to observe this cluster, and two other intermediate age massive GC candidates. The aim is to derive ages, metallicities and internal extinction, in a self consistent way. This will provide a test on the origin and chemical evolution of the host galaxy, and a possibilty to assess the reliability of photometrically derived ages and masses for young GC candidates in general. The latter point is important, because GCs, beeing fossil starbursts, may be used to probe the starburst history of galaxies in the universe. Also, beeing true single stellar populations, massive {where number of stars are large and statisical fluctuations small} GCs provide important tests for stellar evolution models.
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