Other
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop10902o&link_type=abstract
HST Proposal ID #10902. Cycle 15
Other
Scientific paper
As we move to intermediate and high redshifts, Luminous Blue Compact Galaxies LBCGs become increasingly common. The nearest LBCGs, with their violent starbursts and rich populations of super star clusters SSCs and globular clusters GCs, thus provide ideal laboratories for studying galaxy evolution. Many LBCGs appear to be involved in mergers between dwarf galaxies, triggering their starbursts. The starburst regions in LBCGs consist of numerous young star clusters, whose populations are both easily measurable with HST and easily modelled. Studying cluster populations provides a powerful probe of the starburst and merger history which is possible neither for closer objects of which there are too few or for those at high redshift which are too far away. We have previously studied the closest LBCG with WFPC2 and found hundreds of bright compact SSCs and GCs. In particular, we found a population of intermediate-age ~2 Gyr GCs, indicating a past event of massive cluster formation. We now propose a multi-wavelength study of the three other LBCGs with the highest known number of SSCs. The extinction is small in these galaxies and age estimates robust. The age distribution of GCs and SSCs will be used to study the past evolution of the galaxies. For each LBCG, we will map its cluster formation history, unveiling its merger and starburst history, and thereby shed light on some of the processes involved in galaxy evolution at high redshift.
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