10293(  1) - 04/02/04 11:13  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      10293
                                                       Version: 1
                                                       Check-in Date: 02-Apr-2004
                                                                      11:12:35

1.Proposal Title:
The Assembly History of Disks and Bulges out to z=1
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2. Proposal For  3. Cycle  4. Parallel Pointing Tolerance
AR               13        <none>
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5. Investigators
                                                                                     Contact?
    PI: Dr. Richard S. Ellis              California Institute of Technology
   CoI: Mr. Kevin Bundy                   California Institute of Technology            N
   CoI: Dr. Tommaso Treu                  University of California - Los Angeles        N
   CoI: Dr. Christopher Conselice         California Institute of Technology            N

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6. Abstract

We propose to exploit the unique set of ACS multi-color images in the Northern GOODS
field in conjunction with a new ground-based database of infrared photometry and
high quality Keck spectroscopy. The overall goal is to correlate the dynamical and
photometric properties of disks and bulges in the context of popular models for
galaxy assembly. The resolved colors and physical scales of bulges in the redshift
range 0.3<z<0.5 will be combined with dynamical masses to determine whether bulges
represent systems that are continuously forming to the present epoch. The scale-
lengths, color-uniformity and morphologies of a mass-selected sample of >100 z=1
disks will be analyzed with extended rotation curves to address the important
question of whether stellar disks were mature and established at early epochs. The
program represents a concerted attempt to address the origin of key components which
form the basis of the Hubble sequence of galaxies.
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                                                10293(  1) - 04/02/04 11:13  - [  2]

            Summary Form for Proposal  10293

  Item                         Used in this proposal
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  Proposal Category            AR
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