8765(  1) - 12/30/99 13:06  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      8765
                                                       Version: 1
                                                       Check-in Date: 30-Dec-1999
                                                                      12:33:02

1.Proposal Title:
An Archival Study of The Mid-UV Structure of Nearby Early-Type Galaxies
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2. Proposal For  3. Cycle
AR               9
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4. Investigators
                                                                                     Contact?
    PI: Claudia-Angelica Chiarenza Burg   Arizona State University
   CoI: Dr. Rogier Windhorst              Arizona State University                      N
   CoI: Dr. John MacKenty                 Space Telescope Science Institute             N
   CoI: Ms Violet Taylor                  Arizona State University                      N

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5. Abstract

Currently, very little is known about nearby galaxy morphology in the UV. The
restframe wavelength of galaxies at z~1 observed by HST in the R band is 3000\A.
Therefore, before we can fully understand the morphology of the many irregular
galaxies that we see at high redshifts, we must first understand what nearby
galaxies look like in the UV. Images below 3100\A cannot be obtained from ground-
based telescopes due to the earth's atmospheric cutoff. We propose to use Archival
WFPC2 images of nearby galaxies in F300W, plus ground-based UBVR, to study
morphology as a function of wavelength. The 2930\A filter on HST extends from
~2500\A- 3200\A (half power points), thus extending much further into the UV than
ground-based U(360). This proposal will look at the predominantly early to mid-type
galaxies found in the (F300W) Archive. We also propose to search the Archive F300W
images taken in parallel mode for the few 'chance' nearby galaxies contained in
them. Specifically, we will use the targeted and parallel F300W images in the
Archive, along with our ground-based data to address the following issues: o
morphology as a function of Hubble type and restframe wavelength for early and mid-
type galaxies in the mid-UV o apply proper bandpass shifting effects to get more
reliable distant galaxy classifications
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                                                8765(  1) - 12/30/99 13:06  - [  2]

            Summary Form for Proposal  8765

  Item                         Used in this proposal
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  Proposal Category            AR
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