9920(  1) - 04/04/03 10:16  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      9920
                                                       Version: 1
                                                       Check-in Date: 04-Apr-2003
                                                                      10:16:21

1.Proposal Title:
The mass assembly history of early-type galaxies at z~1
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2. Proposal For  3. Cycle
AR               11
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4. Investigators
                                                                                     Contact?
    PI: Richard Ellis                     California Institute of Technology
   CoI: Dr. Tommaso Treu                  California Institute of Technology            N
   CoI: Dr. Pieter van Dokkum             Yale University                               N

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5. Abstract

We propose to analyze multi-color ACS images of ~200 z=1 early-type galaxies in the
extended GOODS HDF North in conjunction with high quality Keck spectra. Resolved
dynamical data and diagnostics of recent star formation will be analyzed with
morphologies and color inhomogeneities quantified from ACS data to address how stars
assemble in early type galaxies over 1 < z < 2. Our proposal follows logically from
a successful campaign utilizing a limited sample in the smaller WFPC-2 HDF-N field.
Access to the GOODS archive will increase the sample 20-fold and enable more robust
conclusions on a question which represents a key challenge for hierarchical theories
of galaxy formation.
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                                                9920(  1) - 04/04/03 10:16  - [  2]

            Summary Form for Proposal  9920

  Item                         Used in this proposal
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  Proposal Category            AR
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