10670(  1) - 04/05/05 12:28  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      10670
                                                       Version: 1
                                                       Check-in Date: 05-Apr-2005
                                                                      16:28:43

1.Proposal Title:
The Geometry of Broad Emission Line Regions in AGN
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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. Hermine Landt                 Smithsonian Institution Astrophysical
                                          Observatory
   CoI: Dr. Martin Elvis                  Smithsonian Institution Astrophysical         N
                                          Observatory
   CoI: Dr. Evlabia Rokaki                University of Athens, Greece                  N
   CoI: Dr. Andy Lawrence                 University of Edinburgh, Institute for        N
                                          Astronomy

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6. Abstract

We propose to determine the gross structure and flow of the broad emission line
region (BELR) of radio-loud active galactic nuclei (AGN). Our approach is to look at
the change of emission line properties (such as, e.g., FWHM and equivalent width)
with inclination angle, the latter determined by a new VLBI/X-ray technique. This
will extend the work of Rokaki, Lawrence, et al. by including both low- and high-
ionization broad emission lines. We will use 197 HST archival spectra for 25 AGN
covering multiple broad emission lines of varying ionization (and so radius). We
shall be able to distinguish rotation about the radio axis, outflow and turbulent
motions within the BELR. The result will be more accurate black hole masses at low
and high redshifts and a deeper understanding of AGN dynamics.
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                                                10670(  1) - 04/05/05 12:28  - [  2]

            Summary Form for Proposal  10670

  Item                         Used in this proposal
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  Proposal Category            AR
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