Computer Science
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9521d&link_type=abstract
HST Proposal ID #9521
Computer Science
Hst Proposal Id #9521 Stellar Populations
Scientific paper
The HST has provided a large quantity of deep photometry of the stellar content of Local Group galaxies, which can be used to understand their star formation histories {SFHs} to unprecedented accuracy. Because of the difficulties of measuring a SFH from a CMD, however, a significant amount of this potential knowledge remains yet untapped. Many groups have developed tools to attempt this task; however differences of philosophy between the groups lead to conflicting results - even when applied to the sam e data. We propose a comprehensive effort for the development, testing, and releasing of analysis tools that will remedy this limitation. The proposed project will allow us to scrutinize each of the algorithms that have been suggested in controlled test s, determine which are best-suited for the task, and produce a technique {or set of techniques} with which we can confidently measure the SFHs of Local Group galaxies previously observed by HST. These techniques will then be applied to our extensive WFPC 2 photometry database, and SFHs will be measured for the majority of Local Group galaxies. We believe that the accurate and unambiguous interpretation of CMDs - the subject of dozens of WFPC2 programs - can only be done textitafter the required tech niques and algorithms have been comprehensively examined, and that this project will allow these data to be used to their fullest potential.
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