9523(  1) - 12/06/01 12:35  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      9523
                                                       Version: 1
                                                       Check-in Date: 06-Dec-2001
                                                                      11:44:26

1.Proposal Title:
The Structure of Young Massive Star Clusters in Spiral Galaxies
------------------------------------------------------------------------------------
2. Proposal For  3. Cycle
AR               11
------------------------------------------------------------------------------------
4. Investigators
                                                                                     Contact?
    PI: Jean Brodie                       University of California Observatories /
                                          Lick Observatory
   CoI: Dr. S\o ren Larsen                University of California Observatories /      N
                                          Lick Observatory

------------------------------------------------------------------------------------
5. Abstract

We propose to search the HST archive for images of nearby spiral galaxies and study
in detail the structure of young massive star clusters previously discovered on
ground-based images. The high angular resolution of WFPC2 images will make it
possible to measure not only physical sizes for clusters, but also to derive their
radial profiles. Combining the HST archive data with existing information about
cluster ages (from ground-based photometry), we will study the evolution of the
luminosity profiles of young stellar clusters as a function of age. The properties
of clusters in our target galaxies will be compared with existing data for LMC
clusters, thus providing new insight into the formation and evolution of young star
clusters in different environments.
------------------------------------------------------------------------------------
                                                9523(  1) - 12/06/01 12:35  - [  2]

            Summary Form for Proposal  9523

  Item                         Used in this proposal
------------------------------------------------------------------------------------------------------------------------------------
  Proposal Category            AR
------------------------------------------------------------------------------------------------------------------------------------