9917(  1) - 04/04/03 10:15  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      9917
                                                       Version: 1
                                                       Check-in Date: 04-Apr-2003
                                                                      10:14:43

1.Proposal Title:
The Fate of Luminous Compact Blue Galaxies:  An Environmental Approach
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2. Proposal For  3. Cycle
AR               11
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4. Investigators
                                                                                     Contact?
    PI: Steven Crawford                   University of Wisconsin - Madison
   CoI: Dr. Matthew Bershady              University of Wisconsin - Madison             N

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5. Abstract

Luminous Compact Blue Galaxies (LCBGs) are the most rapidly evolving galaxy
population between 0.4 < z < 1.0. Despite their small sizes of 2-3 kpc, LCBGs are
powerful engines of star formation that dominate the global SFR over that redshift
regime. They appear to be a link between local, low-mass HII galaxies and high-z,
high-luminosity Lyman Break galaxies. As such, LCBGs may provide an important test
of hierarchical structure-formation scenarios. Currently, a debate rages over what
LCBGs are: Are we seeing proto-spheroidals or the formation of spiral bulges? We
propose to identify a sample of LCBGs in 10 intermediate-z clusters areas from
Archive WFPC2 images through photometric structural measurements (e.g., surface
brightness, size, and concentration). These galaxies cannot be resolved in ground-
based images. We then will measure the relative number densities and photometric
properties of LCBGs in clusters and the field. By combining this comparison with
what we know about the morphology-density relationship today, we will gain new
insight on the ultimate fate of LCBGs and the differences between galaxy evolution
in field and cluster environments. The WFPC2 data, combined with our deep multi-
color, ground-based imaging from the WIYN 3.5m telescope will provide the largest
data set of intermediate-z LCBGs to date.
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                                                9917(  1) - 04/04/03 10:15  - [  2]

            Summary Form for Proposal  9917

  Item                         Used in this proposal
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  Proposal Category            AR
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