Comparisons of Local Group Stellar Populations: Construction of a Public Database

Details Comparisons of Local Group Stellar Populations: Construction of a Public Database Comparisons of Local Group Stellar Populations: Construction of a Public Database

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9203h&link_type=abstract

HST Proposal ID #9203

Computer Science

Hst Proposal Id #9203 Stellar Populations

Scientific paper

We propose a continuation of a Cycle 9 archival proposal to construct a public database of stellar photometry of resolved stellar populations within Local Group galaxies. We will use this database to compare stellar population characteristics of different regions in the Local Group differentially, avoiding some of the complications of comparisons with stellar evolution models, and to synthesize the results. In particular, we will address the following issues: 1} What are the relative ages of the oldest populations in Milky Way neighbors? 2} To what degree is star formation is ``bursty'' in different Local Group galaxies? 3} Is there direct evidence for variations in the IMF in nearby galaxies? 4} What is the ``average cosmic star formation history" for dwarf galaxies in the Local Group? 5}What is the amount of mechanical and radiative energy input into the ISMs of different galaxies by massive stars? This proposal is a continuation of a successful archival proposal from last year {Cycle 9}, the need for which was anticipated in last year's proposal. The current proposal shows results from initial work on the stellar populations of a subset of Local Group dwarfs that demonstrate that we can generate quality photometry and clearly suggest interesting returns.

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