Mathematics – Metric Geometry
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.4052w&link_type=abstract
HST Proposal ID #4052
Mathematics
Metric Geometry
Hst Proposal Id #4052 Quasars &Amp, Agn
Scientific paper
An axisymmetric geometry for the inner few parsesc of quasars is strongly suggested by several new investigations. A mass-luminosity relation has been suggested as well as a dependence of ionization of the Broad Line Region on continuum luminosity. These recent studies offer exciting prospects for probing the innermost regions by means of orientation-dependent emission line ratios, equivalent widths and profiles, and continuum spectra, including luminosities in the radio, UV, and X-ray regions.We propose to measure the UV line and continuum (FOS) spectra (rest wavelengths>1170A) in a complete sample of 3CR radio quasars extended to include quasars with measured X-ray flux densities and a range of radio core-dominance. These spectra are being extended by ground-based observations to ~8000A, to cover high and low ionization lines in the same quasar, and the HST sample itself is being complemented by higher redshift quasars where the strong lines of Ly-alpha,CIV lambda 1549, and CIIIlambda1909 are being observed from the ground. Some of several questions that we hope to answer are: 1. Is their evidence for massive accretion disks? (via equivalent width distributions and correlations with radio core-dominance for lines of different ionization).2. Are the line widths and fluxes correlated with the radio, UV or X-ray continuum properties? Is the result the same for all lines, in particular Fe II, C IV and H-Beta? What can this tell us about the kinematics and geometry of the BLR 3? What is the origin
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