6093( 0) - 07/18/95 19:57 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6093 Version: ********** Check-in Date: ********** 1.Proposal Title: Very High Density Clumps and Outflowing Winds in QSO Emission Line Regions ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Quasars GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Jack Baldwin Cerro Tololo Interamerican Observatory CoI: Gary Ferland University of Kentucky N CoI: Robert Carswell Institute of Astronomy, University of N Cambridge CoI: Gerard Williger Max-Planck-Institut fur Astronomie, N Heidelberg ------------------------------------------------------------------------------------ 6. Abstract We will use HST ultraviolet spectra to test the idea that the Broad Absorption Line (BAL) regions in QSOs consist of gas being ablated off the photospheres of stars located very near (0.02pc) to the central continuum source. We have found good evidence for this in a recent detailed study of the optical spectra of several luminous high redshift quasars with unusually narrow line profiles. In one of these objects, we can distinguish kinematically between at least three distinct gas components in the Broad Lined Region. Comparison between photoionization models and the emission-line intensity ratios from each component indicates that there is an outer region lying about 1-2 pc from the continuum source which produces a more-or- less normal QSO spectrum, and then two inner regions both about 0.02 pc from the nucleus with 10x solar metallicity. One of these inner regions appears to be a 10^4 kms outflowing wind with hydrogen density n(H) = 10^11 cm^-3 and a covering factor of ~0.5. The other component has n(H) = 10^13.5 cm^-3 (nearly that of the photosphere of a main sequence star), a covering factor of about 0.1-0.2, and line widths of only 1000kms (very similar to the virial velocities of stars at the centers M87 massive galaxies like M87). It is this ultra-dense region which we identify with ablating stars. The conclusive test for a very high density/high flux environment will be the detection with FOS of certain UV lines including NeVIII 774, OIII 834 and OV 630. ------------------------------------------------------------------------------------ 6093( 0) - 07/18/95 19:57 - [ 2] Observations Description ------------------------ We will use FOS + grating G270H to take spectra of two V=17.5 mag quasars, aiming for 20:1 signal-to-noise ratio in the continuum at 2500A. We will also observe 1 of the QSOs with FOS+grating G160L going for 15:1 s:n at 1500A. Real Time Justification ----------------------- No special requests None Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6093( 0) - 07/18/95 19:57 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 Q0207-398 GALAXY, QSO RA=2H 9M 28.57S +/- 0.1S, DEC=- 2000 Z = 2.81 V=17.15 +/- 0.5 39D 39' 40.0" +/- 0.1", PLATE- F(5000)=5.0 +/- 3 E-16 ID=00AL Comments: Coordinates measured with GASP 2 PKS2212-299 GALAXY, QUASAR RA=22H 15M 16.04S +/- 0.1S, DEC= 2000 Z = 2.70 V=17.44 +/- 0.5 -29D 44' 23.7" +/- 0.1", PLATE- B-V=0.14 ID=014I F(5000)=5.0 +/- 3 E-16 Comments: Coordinates measured with GASP 6093( 0) - 07/18/95 19:57 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 Q0207-398 FOS/RD ACQ/BIN 4.3 MIRROR 1 21S ONBOARD ACQ FOR 20 ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 Q0207-398 FOS/RD ACQ/PEA 0.3 MIRROR SCAN-STEP- 1 17S ONBOARD ACQ FOR 40 K Y=0.11, SCAN- STEP-X=0.11, SEARCH-SIZE- Y=5, SEARCH- Comments: SIZE-X=5 ------------------------------------------------------------------------------------------------------------------------------------ 40 Q0207-398 FOS/RD ACCUM 0.5 G270H 1 2736S ------------------------------------------------------------------------------------------------------------------------------------ 60 Q0207-398 FOS/BL ACCUM 1.0- G160L STEP- 1 2080S PAIR PATT=SINGLE ------------------------------------------------------------------------------------------------------------------------------------ 70 Q0207-398 FOS/BL ACCUM 1.0- G160L STEP- 1 2439S PAIR PATT=SINGLE ------------------------------------------------------------------------------------------------------------------------------------ 6093( 0) - 07/18/95 19:57 - [ 5] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 110 PKS2212-299 FOS/RD ACQ/BIN 4.3 MIRROR 1 21S ONBOARD ACQ FOR 120 ARY ------------------------------------------------------------------------------------------------------------------------------------ 120 PKS2212-299 FOS/RD ACQ/PEA 0.3 MIRROR SCAN-STEP- 1 17S ONBOARD ACQ FOR 140 K Y=0.11, SCAN- STEP-X=0.11, SEARCH-SIZE- Y=5, SEARCH- Comments: SIZE-X=5 ------------------------------------------------------------------------------------------------------------------------------------ 140 PKS2212-299 FOS/RD ACCUM 0.5 G270H 1 2610S ------------------------------------------------------------------------------------------------------------------------------------ 6093( 0) - 07/18/95 19:57 - [ 6] Summary Form for Proposal 6093 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SCAN-STEP-Y=0.11 SCAN-STEP-X=0.11 SEARCH-SIZE-Y=5 SEARCH-SIZE-X=5 STEP-PATT=SINGLE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Quasars ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 20 ONBOARD ACQ FOR 40 ONBOARD ACQ FOR 120 ONBOARD ACQ FOR 140 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G270H G160L ------------------------------------------------------------------------------------------------------------------------------------ Target Names Q0207-398 PKS2212-299 ------------------------------------------------------------------------------------------------------------------------------------