Computer Science
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5897b&link_type=abstract
HST Proposal ID #5897
Computer Science
Hst Proposal Id #5897 Stellar Populations
Scientific paper
We propose WFPC2 observations that will provide color- magnitude diagrams reaching to below the main-sequence turnoffs in 7 of the oldest star clusters in the Large Magellanic Cloud (LMC)Null. These data will allow a direct comparison of the ages of these clusters with those of Milky Way globular clusters. The primary goals are: a) to determine if the initial bursts of star formation occurred at the same time in both galaxies, and b) to determine if all of the clusters in the LMC with Fe/H<-1.7 have the same ages (indicating that the first epoch of star formation in the LMC occurred during a free-fall collapse), or if they have a range in ages (indicating a non-monolithic collapse or possibly a series of mergers that formed the LMC)Null. Our Cycle 4 observations of globular clusters in the outer halo of the Milky Way demonstrate that the proposed LMC observations are straightforward for HST, even though impossible from the ground. For the first time, we be able to make a direct comparison of the ages of the ancestral components of two galaxies of widely differing mass and Hubble type.
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