5818(  0) - 07/18/95 18:05  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      5818
                                                       Version: **********
                                                       Check-in Date: **********

1.Proposal Title:
An Archival Search For Young Globular Clusters in Galaxies
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2. Scientific Category   3. Proposal For  4. Cycle
Galaxies & Clusters         AR               5
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5. Investigators
                                                                                     Contact?
    PI: Brad Whitmore                     Space Telescope Science Institute
   CoI: Ray Lucas                         Space Telescope Science Institute             N

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6. Abstract

One of the most intriguing results from HST has been the discovery of ultraluminous
star clusters in interacting and merging galaxies. These clusters have the
luminosities, colors, and sizes that would be expected of young globular clusters
produced by the interaction.  We propose to use the data in the HST Archive to
determine how prevalent this phenomena is, and to determine whether similar clusters
are produced in other environments. Three samples will be extracted and studied in a
systematic and consistent manner: 1) interacting and merging galaxies, 2) starburst
galaxies, 3) a control sample of ``normal'' galaxies.  A preliminary search of the
archives shows that there are at least 20 galaxies in each of these samples, and the
number will grow by about 50 \ observations become available. The data will be used
to determine the luminosity function, color histogram , spatial distribution, and
structural properties of the clusters using the same techniques employed in our
study of NGC 7252 (``Atoms -for-Peace'' galaxy) and NGC 4038/4039 (``The
Antennae''). Our ultimate goals are: 1) to understand how globular clusters form,
and 2) to use the clusters as evolutionary tracers to unravel the histories of
interacting galaxies.
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  Observations Description
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  Real Time Justification
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  Calibration Justification
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  Additional Comments
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                                                5818(  0) - 07/18/95 18:05  - [  2]

  Data Distribution

  Media:           8MM
  Blocking Factor: 10
  Ship To:         PI_Address
  Ship Via:        UPS
  Email:                                                              ,
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                                                5818(  0) - 07/18/95 18:05  - [  3]

            Summary Form for Proposal  5818

  Item                         Used in this proposal
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  Proposal Category            AR
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  Scientific Category          Galaxies & Clusters
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