8001(  1) - 04/16/98 14:14  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      8001
                                                       Version: 1
                                                       Check-in Date: 16-Apr-1998
                                                                      14:10:52

1.Proposal Title:
Investigations of Star Clusters in M33
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2. Proposal For  3. Cycle
AR               7
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4. Investigators
                                                                                     Contact?
    PI: Dr. Luciana Bianchi               The Johns Hopkins University, Center for
                                          Astrophysical Sciences
   CoI: Rupali Chandar                    The Johns Hopkins University, Center for      N
                                          Astrophysical Sciences
   CoI: Dr. Holland Ford                  The Johns Hopkins University, Center for      N
                                          Astrophysical Sciences

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5. Abstract

We propose to analyse archival WFPC-2 U, B, V, and far UV observations of the nearby
spiral galaxy M33 to search for ``populous'' star clusters and study their
photometric properties. Star clusters are ideal laboratories for the study of
stellar populations and star formation history in galaxies. In individual packets,
they represent single age and single abundance points which can be used to test
stellar evolutionary models. Many of the M33 fields found in the archive are of
nuclear and crowded spiral arm regions which are impossible to resolve from ground-
based images, and which will extend the current knowledge of star clusters in this
galaxy. Specifically we will: 1) produce a catalog of cluster positions, magnitudes,
colors, and sizes 2) obtain age estimates from the integrated cluster colors 3)
obtain mass estimates from theoretical mass-to-light ratios 4) obtain independent
estimates of ages and metallicities from follow up spectroscopy This information
will be combined with similar data for stellar clusters in the Milky Way, M31 and
the Magellanic Clouds, yielding a clearer picture of the evolutionary history of
these galaxies and the dependence of cluster formation on global galactic
properties.
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  Data Distribution

  Media:           ELECTRONIC
  Blocking Factor: 10
  Ship To:         PI_Address
  Ship Via:
  Email:
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                                                8001(  1) - 04/16/98 14:14  - [  2]

            Summary Form for Proposal  8001

  Item                         Used in this proposal
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  Proposal Category            AR
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