Computer Science
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8122s&link_type=abstract
HST Proposal ID #8122
Computer Science
Hst Proposal Id #8122 Field Stellar Populations
Scientific paper
We propose to exploit the unique, high spatial resolution of the WFPC2 to obtain deep color-magnitude diagrams {CMDs} of two newly recognized very nearby {D<3 Mpc} blue compact dwarf galaxies {BCDs}. The CMDs will be modeled to extract the star- formation histories; in particular, we will use red-giant stars to determine WHEN these galaxies first started to make the bulk of their stellar population. This will provide an important alternative to galaxy counts for testing the predictions of dwarf galaxy evolution. BCDs are very small, nearby, starbursting systems which {at least in some cases} also contain an older stellar population. The star-formation history of BCDs is a key to understanding the enigmatic evolution of dwarf galaxy populations - for example, the faint blue excess, thought to be due to low-mass galaxies experiencing a short epoch of star formation at redshifts 0.5
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