10659(  1) - 04/05/05 12:22  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      10659
                                                       Version: 1
                                                       Check-in Date: 05-Apr-2005
                                                                      16:22:42

1.Proposal Title:
Constraining Both the Star-Formation History and Metal-Enrichment History of
Galaxies
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2. Proposal For  3. Cycle  4. Parallel Pointing Tolerance
AR               14        <none>
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5. Investigators
                                                                                     Contact?
    PI: Dr. Sara R. Heap                  NASA Goddard Space Flight Center
   CoI: Prof. Gustavo Bruzual             Centro de Investigaciones de Astronomia       N
   CoI: Dr. Stephane Charlot              CNRS, Institute d'Astrophysique de Paris      N
   CoI: Mr. Don J. Lindler                Sigma Research and Engineering Corporation    N
   CoI: Ms. Anna Gallazzi                 Max-Planck-Institut fur Astrophysik           N

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6. Abstract

Using 380 stellar spectra from Hubble's Next Generation Spectral Library (NGSL;
PI=Michael Gregg; GO 9088, 9786) incorporated in our stellar population synthesis
code (Bruzual & Charlot 2003), we propose to constrain simultaneously the star-
formation history and mean age, stellar metallicity and mass of galaxies over a wide
redshift interval (z= 0 -2). The main advantages of the NGSL are the high-quality
spectrophotometry (S/N >50) and broad wavelength coverage (2000-10, 000 Ang) of the
STIS spectra. The NGSL enables mid-UV as well as optical spectral indices to be
used, thereby increasing the redshift interval of their application. It also
guarantees consistency in treating low- and high-redshift galaxies, since the same
stars are used as spectral templates. To realize the full potential of the NGSL,
however, will require significant custom data-processing, calibration, and
evaluation of the STIS data.
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                                                10659(  1) - 04/05/05 12:22  - [  2]

            Summary Form for Proposal  10659

  Item                         Used in this proposal
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  Proposal Category            AR
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