8749(  1) - 12/30/99 13:03  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      8749
                                                       Version: 1
                                                       Check-in Date: 30-Dec-1999
                                                                      12:31:43

1.Proposal Title:
Comparisons of Local Group Stellar Populations: Construction of a Public Database
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2. Proposal For  3. Cycle
AR               9
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4. Investigators
                                                                                     Contact?
    PI: Jon Holtzman                      New Mexico State University
   CoI: Dr. Rene Walterbos                New Mexico State University                   N

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5. Abstract

We propose 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: beginitemize em What are the relative ages of the oldest
populations in Milky Way neighbors? em To what degree is star formation is
``bursty'' in different Local Group galaxies? em Is there direct evidence for
variations in the IMF in nearby galaxies? em What is the ``average cosmic star
formation history" for dwarf galaxies in the Local Group? em What is the amount of
mechanical and radiative energy input into the ISMs of different galaxies by massive
stars? enditemize
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                                                8749(  1) - 12/30/99 13:03  - [  2]

            Summary Form for Proposal  8749

  Item                         Used in this proposal
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  Proposal Category            AR
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