5820( 0) - 07/18/95 18:05 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 5820 Version: ********** Check-in Date: ********** 1.Proposal Title: THE INNER REGIONS OF RADIO-LOUD QUASARS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Quasars AR 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Beverley Wills Department of Astronomy, University of Texas at Austin CoI: Jack Baldwin Cerro Tololo Inter-American Observatory N CoI: Hagai Netzer Tel-Aviv University N CoI: Gary J. Ferland University of Kentucky, Lexington N CoI: Derek Wills Department of Astronomy,University of N Texas at Austin CoI: Ian W. A. Browne Jodrell Bank,University of Manchester N CoI: Robert F. Carswell Institute of Astronomy,Cambridge N University ------------------------------------------------------------------------------------ 6. Abstract Our recent discovery of highly significant differences between the broad emission line spectra of radio-quiet and radio-loud quasars may finally lead to the solution of the long-standing puzzle of why just some QSOs (about 10\ powerful radio- emitters. Radio emission is clearly associated with low- velocity gas and the red wings that are prominent in the broad lines of C IV Lambda1549 and H Beta. The most extreme red wings occur in core-dominant quasars, suggesting axial jet flow. Low velocity BLR gas is related to strong NLR emission, weak optical Fe II emission, and a strong hard X-ray continuum. All good HST spectra for > 100\ radio-loud quasars with z <\ 1.2 will be used, with ground-based spectra, to relate line profile components to radio core- and lobe luminosity, the core-to-lobe ratio (an orientation indicator), and X-ray luminosity and spectral index. We propose to combine conventional profile analyses with the newly-applied technique of `spectral' principal component analysis (PCA). This powerful linear correlation technique allows line components to be distinguished based on their correlated inter -spectrum variations. Because it uses differences among spectra it does not depend on subjective continuum placement or unphysical line-profile parameterization, so that the signal-to-noise ratio in `principal component spectra' can be vastly improved by increasing the number of spectra, thereby sampling an increasing range of spectral properties. ------------------------------------------------------------------------------------ 5820( 0) - 07/18/95 18:05 - [ 2] Observations Description ------------------------ Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 5820( 0) - 07/18/95 18:05 - [ 3] Summary Form for Proposal 5820 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category AR ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Quasars ------------------------------------------------------------------------------------------------------------------------------------