9223(  1) - 12/20/00 23:47  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      9223
                                                       Version: 1
                                                       Check-in Date: 20-Dec-2000
                                                                      23:40:44

1.Proposal Title:
The Host Galaxies of Radio-Loud AGN: Removing the Luminosity-Redshift Degeneracy
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2. Proposal For  3. Cycle
AR               10
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4. Investigators
                                                                                     Contact?
    PI: Meg Urry                          Space Telescope Science Institute
   CoI: Mr. Matthew O'Dowd                University of Melbourne                       N
   CoI: Dr. Riccardo Scarpa               ESO                                           N

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5. Abstract

The host galaxies of radio-loud AGN can be characterized extremely well with HST
data. We propose to extend our survey of low-power radio-loud AGN to much higher
power, over a matching redshift range (0.1<=sssim z<=sssim 1.5). Our study has two
primary goals: beginitemize em(1) To assess the possible correlation of AGN nuclear
luminosity with host galaxy magnitude, which might be expected from the black hole
mass -- bulge mass correlation in local galaxies. This has profound implications for
the origin and evolution of galaxies and black holes. em(2) To observe directly
evolution of the host galaxies of radio-loud AGN, without the usual confusion caused
by the (unphysical) L-z correlation inherent in flux- limited samples. enditemize
The proposed archival project concerns 69 quasars and radio galaxies from the well-
defined 2 Jy sample. Building on our strong record of HST results on low-power AGN,
this work will lead to a uniformly analyzed sample of nearly 200 radio-loud AGN,
spanning a broad range in nuclear power at each redshift. Host galaxies will be
detected and well characterized for at least half the sample, with careful attention
to error analysis, using our already- developed analysis software.
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                                                9223(  1) - 12/20/00 23:47  - [  2]

            Summary Form for Proposal  9223

  Item                         Used in this proposal
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  Proposal Category            AR
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